/**
* Meta API: WP_Meta_Query class
*
* @package WordPress
* @subpackage Meta
* @since 4.4.0
*/
/**
* Core class used to implement meta queries for the Meta API.
*
* Used for generating SQL clauses that filter a primary query according to metadata keys and values.
*
* WP_Meta_Query is a helper that allows primary query classes, such as WP_Query and WP_User_Query,
*
* to filter their results by object metadata, by generating `JOIN` and `WHERE` subclauses to be attached
* to the primary SQL query string.
*
* @since 3.2.0
*/
#[AllowDynamicProperties]
class WP_Meta_Query {
/**
* Array of metadata queries.
*
* See WP_Meta_Query::__construct() for information on meta query arguments.
*
* @since 3.2.0
* @var array
*/
public $queries = array();
/**
* The relation between the queries. Can be one of 'AND' or 'OR'.
*
* @since 3.2.0
* @var string
*/
public $relation;
/**
* Database table to query for the metadata.
*
* @since 4.1.0
* @var string
*/
public $meta_table;
/**
* Column in meta_table that represents the ID of the object the metadata belongs to.
*
* @since 4.1.0
* @var string
*/
public $meta_id_column;
/**
* Database table that where the metadata's objects are stored (eg $wpdb->users).
*
* @since 4.1.0
* @var string
*/
public $primary_table;
/**
* Column in primary_table that represents the ID of the object.
*
* @since 4.1.0
* @var string
*/
public $primary_id_column;
/**
* A flat list of table aliases used in JOIN clauses.
*
* @since 4.1.0
* @var array
*/
protected $table_aliases = array();
/**
* A flat list of clauses, keyed by clause 'name'.
*
* @since 4.2.0
* @var array
*/
protected $clauses = array();
/**
* Whether the query contains any OR relations.
*
* @since 4.3.0
* @var bool
*/
protected $has_or_relation = false;
/**
* Constructor.
*
* @since 3.2.0
* @since 4.2.0 Introduced support for naming query clauses by associative array keys.
* @since 5.1.0 Introduced `$compare_key` clause parameter, which enables LIKE key matches.
* @since 5.3.0 Increased the number of operators available to `$compare_key`. Introduced `$type_key`,
* which enables the `$key` to be cast to a new data type for comparisons.
*
* @param array $meta_query {
* Array of meta query clauses. When first-order clauses or sub-clauses use strings as
* their array keys, they may be referenced in the 'orderby' parameter of the parent query.
*
* @type string $relation Optional. The MySQL keyword used to join the clauses of the query.
* Accepts 'AND' or 'OR'. Default 'AND'.
* @type array ...$0 {
* Optional. An array of first-order clause parameters, or another fully-formed meta query.
*
* @type string|string[] $key Meta key or keys to filter by.
* @type string $compare_key MySQL operator used for comparing the $key. Accepts:
* - '='
* - '!='
* - 'LIKE'
* - 'NOT LIKE'
* - 'IN'
* - 'NOT IN'
* - 'REGEXP'
* - 'NOT REGEXP'
* - 'RLIKE'
* - 'EXISTS' (alias of '=')
* - 'NOT EXISTS' (alias of '!=')
* Default is 'IN' when `$key` is an array, '=' otherwise.
* @type string $type_key MySQL data type that the meta_key column will be CAST to for
* comparisons. Accepts 'BINARY' for case-sensitive regular expression
* comparisons. Default is ''.
* @type string|string[] $value Meta value or values to filter by.
* @type string $compare MySQL operator used for comparing the $value. Accepts:
* - '='
* - '!='
* - '>'
* - '>='
* - '<'
* - '<='
* - 'LIKE'
* - 'NOT LIKE'
* - 'IN'
* - 'NOT IN'
* - 'BETWEEN'
* - 'NOT BETWEEN'
* - 'REGEXP'
* - 'NOT REGEXP'
* - 'RLIKE'
* - 'EXISTS'
* - 'NOT EXISTS'
* Default is 'IN' when `$value` is an array, '=' otherwise.
* @type string $type MySQL data type that the meta_value column will be CAST to for
* comparisons. Accepts:
* - 'NUMERIC'
* - 'BINARY'
* - 'CHAR'
* - 'DATE'
* - 'DATETIME'
* - 'DECIMAL'
* - 'SIGNED'
* - 'TIME'
* - 'UNSIGNED'
* Default is 'CHAR'.
* }
* }
*/
public function __construct( $meta_query = false ) {
if ( ! $meta_query ) {
return;
}
if ( isset( $meta_query['relation'] ) && 'OR' === strtoupper( $meta_query['relation'] ) ) {
$this->relation = 'OR';
} else {
$this->relation = 'AND';
}
$this->queries = $this->sanitize_query( $meta_query );
}
/**
* Ensures the 'meta_query' argument passed to the class constructor is well-formed.
*
* Eliminates empty items and ensures that a 'relation' is set.
*
* @since 4.1.0
*
* @param array $queries Array of query clauses.
* @return array Sanitized array of query clauses.
*/
public function sanitize_query( $queries ) {
$clean_queries = array();
if ( ! is_array( $queries ) ) {
return $clean_queries;
}
foreach ( $queries as $key => $query ) {
if ( 'relation' === $key ) {
$relation = $query;
} elseif ( ! is_array( $query ) ) {
continue;
// First-order clause.
} elseif ( $this->is_first_order_clause( $query ) ) {
if ( isset( $query['value'] ) && array() === $query['value'] ) {
unset( $query['value'] );
}
$clean_queries[ $key ] = $query;
// Otherwise, it's a nested query, so we recurse.
} else {
$cleaned_query = $this->sanitize_query( $query );
if ( ! empty( $cleaned_query ) ) {
$clean_queries[ $key ] = $cleaned_query;
}
}
}
if ( empty( $clean_queries ) ) {
return $clean_queries;
}
// Sanitize the 'relation' key provided in the query.
if ( isset( $relation ) && 'OR' === strtoupper( $relation ) ) {
$clean_queries['relation'] = 'OR';
$this->has_or_relation = true;
/*
* If there is only a single clause, call the relation 'OR'.
* This value will not actually be used to join clauses, but it
* simplifies the logic around combining key-only queries.
*/
} elseif ( 1 === count( $clean_queries ) ) {
$clean_queries['relation'] = 'OR';
// Default to AND.
} else {
$clean_queries['relation'] = 'AND';
}
return $clean_queries;
}
/**
* Determines whether a query clause is first-order.
*
* A first-order meta query clause is one that has either a 'key' or
* a 'value' array key.
*
* @since 4.1.0
*
* @param array $query Meta query arguments.
* @return bool Whether the query clause is a first-order clause.
*/
protected function is_first_order_clause( $query ) {
return isset( $query['key'] ) || isset( $query['value'] );
}
/**
* Constructs a meta query based on 'meta_*' query vars
*
* @since 3.2.0
*
* @param array $qv The query variables.
*/
public function parse_query_vars( $qv ) {
$meta_query = array();
/*
* For orderby=meta_value to work correctly, simple query needs to be
* first (so that its table join is against an unaliased meta table) and
* needs to be its own clause (so it doesn't interfere with the logic of
* the rest of the meta_query).
*/
$primary_meta_query = array();
foreach ( array( 'key', 'compare', 'type', 'compare_key', 'type_key' ) as $key ) {
if ( ! empty( $qv[ "meta_$key" ] ) ) {
$primary_meta_query[ $key ] = $qv[ "meta_$key" ];
}
}
// WP_Query sets 'meta_value' = '' by default.
if ( isset( $qv['meta_value'] ) && '' !== $qv['meta_value'] && ( ! is_array( $qv['meta_value'] ) || $qv['meta_value'] ) ) {
$primary_meta_query['value'] = $qv['meta_value'];
}
$existing_meta_query = isset( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ? $qv['meta_query'] : array();
if ( ! empty( $primary_meta_query ) && ! empty( $existing_meta_query ) ) {
$meta_query = array(
'relation' => 'AND',
$primary_meta_query,
$existing_meta_query,
);
} elseif ( ! empty( $primary_meta_query ) ) {
$meta_query = array(
$primary_meta_query,
);
} elseif ( ! empty( $existing_meta_query ) ) {
$meta_query = $existing_meta_query;
}
$this->__construct( $meta_query );
}
/**
* Returns the appropriate alias for the given meta type if applicable.
*
* @since 3.7.0
*
* @param string $type MySQL type to cast meta_value.
* @return string MySQL type.
*/
public function get_cast_for_type( $type = '' ) {
if ( empty( $type ) ) {
return 'CHAR';
}
$meta_type = strtoupper( $type );
if ( ! preg_match( '/^(?:BINARY|CHAR|DATE|DATETIME|SIGNED|UNSIGNED|TIME|NUMERIC(?:\(\d+(?:,\s?\d+)?\))?|DECIMAL(?:\(\d+(?:,\s?\d+)?\))?)$/', $meta_type ) ) {
return 'CHAR';
}
if ( 'NUMERIC' === $meta_type ) {
$meta_type = 'SIGNED';
}
return $meta_type;
}
/**
* Generates SQL clauses to be appended to a main query.
*
* @since 3.2.0
*
* @param string $type Type of meta. Possible values include but are not limited
* to 'post', 'comment', 'blog', 'term', and 'user'.
* @param string $primary_table Database table where the object being filtered is stored (eg wp_users).
* @param string $primary_id_column ID column for the filtered object in $primary_table.
* @param object $context Optional. The main query object that corresponds to the type, for
* example a `WP_Query`, `WP_User_Query`, or `WP_Site_Query`.
* Default null.
* @return string[]|false {
* Array containing JOIN and WHERE SQL clauses to append to the main query,
* or false if no table exists for the requested meta type.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
public function get_sql( $type, $primary_table, $primary_id_column, $context = null ) {
$meta_table = _get_meta_table( $type );
if ( ! $meta_table ) {
return false;
}
$this->table_aliases = array();
$this->meta_table = $meta_table;
$this->meta_id_column = sanitize_key( $type . '_id' );
$this->primary_table = $primary_table;
$this->primary_id_column = $primary_id_column;
$sql = $this->get_sql_clauses();
/*
* If any JOINs are LEFT JOINs (as in the case of NOT EXISTS), then all JOINs should
* be LEFT. Otherwise posts with no metadata will be excluded from results.
*/
if ( str_contains( $sql['join'], 'LEFT JOIN' ) ) {
$sql['join'] = str_replace( 'INNER JOIN', 'LEFT JOIN', $sql['join'] );
}
/**
* Filters the meta query's generated SQL.
*
* @since 3.1.0
*
* @param string[] $sql Array containing the query's JOIN and WHERE clauses.
* @param array $queries Array of meta queries.
* @param string $type Type of meta. Possible values include but are not limited
* to 'post', 'comment', 'blog', 'term', and 'user'.
* @param string $primary_table Primary table.
* @param string $primary_id_column Primary column ID.
* @param object $context The main query object that corresponds to the type, for
* example a `WP_Query`, `WP_User_Query`, or `WP_Site_Query`.
*/
return apply_filters_ref_array( 'get_meta_sql', array( $sql, $this->queries, $type, $primary_table, $primary_id_column, $context ) );
}
/**
* Generates SQL clauses to be appended to a main query.
*
* Called by the public WP_Meta_Query::get_sql(), this method is abstracted
* out to maintain parity with the other Query classes.
*
* @since 4.1.0
*
* @return string[] {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_clauses() {
/*
* $queries are passed by reference to get_sql_for_query() for recursion.
* To keep $this->queries unaltered, pass a copy.
*/
$queries = $this->queries;
$sql = $this->get_sql_for_query( $queries );
if ( ! empty( $sql['where'] ) ) {
$sql['where'] = ' AND ' . $sql['where'];
}
return $sql;
}
/**
* Generates SQL clauses for a single query array.
*
* If nested subqueries are found, this method recurses the tree to
* produce the properly nested SQL.
*
* @since 4.1.0
*
* @param array $query Query to parse (passed by reference).
* @param int $depth Optional. Number of tree levels deep we currently are.
* Used to calculate indentation. Default 0.
* @return string[] {
* Array containing JOIN and WHERE SQL clauses to append to a single query array.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_for_query( &$query, $depth = 0 ) {
$sql_chunks = array(
'join' => array(),
'where' => array(),
);
$sql = array(
'join' => '',
'where' => '',
);
$indent = '';
for ( $i = 0; $i < $depth; $i++ ) {
$indent .= ' ';
}
foreach ( $query as $key => &$clause ) {
if ( 'relation' === $key ) {
$relation = $query['relation'];
} elseif ( is_array( $clause ) ) {
// This is a first-order clause.
if ( $this->is_first_order_clause( $clause ) ) {
$clause_sql = $this->get_sql_for_clause( $clause, $query, $key );
$where_count = count( $clause_sql['where'] );
if ( ! $where_count ) {
$sql_chunks['where'][] = '';
} elseif ( 1 === $where_count ) {
$sql_chunks['where'][] = $clause_sql['where'][0];
} else {
$sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )';
}
$sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] );
// This is a subquery, so we recurse.
} else {
$clause_sql = $this->get_sql_for_query( $clause, $depth + 1 );
$sql_chunks['where'][] = $clause_sql['where'];
$sql_chunks['join'][] = $clause_sql['join'];
}
}
}
// Filter to remove empties.
$sql_chunks['join'] = array_filter( $sql_chunks['join'] );
$sql_chunks['where'] = array_filter( $sql_chunks['where'] );
if ( empty( $relation ) ) {
$relation = 'AND';
}
// Filter duplicate JOIN clauses and combine into a single string.
if ( ! empty( $sql_chunks['join'] ) ) {
$sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) );
}
// Generate a single WHERE clause with proper brackets and indentation.
if ( ! empty( $sql_chunks['where'] ) ) {
$sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')';
}
return $sql;
}
/**
* Generates SQL JOIN and WHERE clauses for a first-order query clause.
*
* "First-order" means that it's an array with a 'key' or 'value'.
*
* @since 4.1.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param array $clause Query clause (passed by reference).
* @param array $parent_query Parent query array.
* @param string $clause_key Optional. The array key used to name the clause in the original `$meta_query`
* parameters. If not provided, a key will be generated automatically.
* Default empty string.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to a first-order query.
*
* @type string[] $join Array of SQL fragments to append to the main JOIN clause.
* @type string[] $where Array of SQL fragments to append to the main WHERE clause.
* }
*/
public function get_sql_for_clause( &$clause, $parent_query, $clause_key = '' ) {
global $wpdb;
$sql_chunks = array(
'where' => array(),
'join' => array(),
);
if ( isset( $clause['compare'] ) ) {
$clause['compare'] = strtoupper( $clause['compare'] );
} else {
$clause['compare'] = isset( $clause['value'] ) && is_array( $clause['value'] ) ? 'IN' : '=';
}
$non_numeric_operators = array(
'=',
'!=',
'LIKE',
'NOT LIKE',
'IN',
'NOT IN',
'EXISTS',
'NOT EXISTS',
'RLIKE',
'REGEXP',
'NOT REGEXP',
);
$numeric_operators = array(
'>',
'>=',
'<',
'<=',
'BETWEEN',
'NOT BETWEEN',
);
if ( ! in_array( $clause['compare'], $non_numeric_operators, true ) && ! in_array( $clause['compare'], $numeric_operators, true ) ) {
$clause['compare'] = '=';
}
if ( isset( $clause['compare_key'] ) ) {
$clause['compare_key'] = strtoupper( $clause['compare_key'] );
} else {
$clause['compare_key'] = isset( $clause['key'] ) && is_array( $clause['key'] ) ? 'IN' : '=';
}
if ( ! in_array( $clause['compare_key'], $non_numeric_operators, true ) ) {
$clause['compare_key'] = '=';
}
$meta_compare = $clause['compare'];
$meta_compare_key = $clause['compare_key'];
// First build the JOIN clause, if one is required.
$join = '';
// We prefer to avoid joins if possible. Look for an existing join compatible with this clause.
$alias = $this->find_compatible_table_alias( $clause, $parent_query );
if ( false === $alias ) {
$i = count( $this->table_aliases );
$alias = $i ? 'mt' . $i : $this->meta_table;
// JOIN clauses for NOT EXISTS have their own syntax.
if ( 'NOT EXISTS' === $meta_compare ) {
$join .= " LEFT JOIN $this->meta_table";
$join .= $i ? " AS $alias" : '';
if ( 'LIKE' === $meta_compare_key ) {
$join .= $wpdb->prepare( " ON ( $this->primary_table.$this->primary_id_column = $alias.$this->meta_id_column AND $alias.meta_key LIKE %s )", '%' . $wpdb->esc_like( $clause['key'] ) . '%' );
} else {
$join .= $wpdb->prepare( " ON ( $this->primary_table.$this->primary_id_column = $alias.$this->meta_id_column AND $alias.meta_key = %s )", $clause['key'] );
}
// All other JOIN clauses.
} else {
$join .= " INNER JOIN $this->meta_table";
$join .= $i ? " AS $alias" : '';
$join .= " ON ( $this->primary_table.$this->primary_id_column = $alias.$this->meta_id_column )";
}
$this->table_aliases[] = $alias;
$sql_chunks['join'][] = $join;
}
// Save the alias to this clause, for future siblings to find.
$clause['alias'] = $alias;
// Determine the data type.
$_meta_type = isset( $clause['type'] ) ? $clause['type'] : '';
$meta_type = $this->get_cast_for_type( $_meta_type );
$clause['cast'] = $meta_type;
// Fallback for clause keys is the table alias. Key must be a string.
if ( is_int( $clause_key ) || ! $clause_key ) {
$clause_key = $clause['alias'];
}
// Ensure unique clause keys, so none are overwritten.
$iterator = 1;
$clause_key_base = $clause_key;
while ( isset( $this->clauses[ $clause_key ] ) ) {
$clause_key = $clause_key_base . '-' . $iterator;
++$iterator;
}
// Store the clause in our flat array.
$this->clauses[ $clause_key ] =& $clause;
// Next, build the WHERE clause.
// meta_key.
if ( array_key_exists( 'key', $clause ) ) {
if ( 'NOT EXISTS' === $meta_compare ) {
$sql_chunks['where'][] = $alias . '.' . $this->meta_id_column . ' IS NULL';
} else {
/**
* In joined clauses negative operators have to be nested into a
* NOT EXISTS clause and flipped, to avoid returning records with
* matching post IDs but different meta keys. Here we prepare the
* nested clause.
*/
if ( in_array( $meta_compare_key, array( '!=', 'NOT IN', 'NOT LIKE', 'NOT EXISTS', 'NOT REGEXP' ), true ) ) {
// Negative clauses may be reused.
$i = count( $this->table_aliases );
$subquery_alias = $i ? 'mt' . $i : $this->meta_table;
$this->table_aliases[] = $subquery_alias;
$meta_compare_string_start = 'NOT EXISTS (';
$meta_compare_string_start .= "SELECT 1 FROM $wpdb->postmeta $subquery_alias ";
$meta_compare_string_start .= "WHERE $subquery_alias.post_ID = $alias.post_ID ";
$meta_compare_string_end = 'LIMIT 1';
$meta_compare_string_end .= ')';
}
switch ( $meta_compare_key ) {
case '=':
case 'EXISTS':
$where = $wpdb->prepare( "$alias.meta_key = %s", trim( $clause['key'] ) ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
break;
case 'LIKE':
$meta_compare_value = '%' . $wpdb->esc_like( trim( $clause['key'] ) ) . '%';
$where = $wpdb->prepare( "$alias.meta_key LIKE %s", $meta_compare_value ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
break;
case 'IN':
$meta_compare_string = "$alias.meta_key IN (" . substr( str_repeat( ',%s', count( $clause['key'] ) ), 1 ) . ')';
$where = $wpdb->prepare( $meta_compare_string, $clause['key'] ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
break;
case 'RLIKE':
case 'REGEXP':
$operator = $meta_compare_key;
if ( isset( $clause['type_key'] ) && 'BINARY' === strtoupper( $clause['type_key'] ) ) {
$cast = 'BINARY';
$meta_key = "CAST($alias.meta_key AS BINARY)";
} else {
$cast = '';
$meta_key = "$alias.meta_key";
}
$where = $wpdb->prepare( "$meta_key $operator $cast %s", trim( $clause['key'] ) ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
break;
case '!=':
case 'NOT EXISTS':
$meta_compare_string = $meta_compare_string_start . "AND $subquery_alias.meta_key = %s " . $meta_compare_string_end;
$where = $wpdb->prepare( $meta_compare_string, $clause['key'] ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
break;
case 'NOT LIKE':
$meta_compare_string = $meta_compare_string_start . "AND $subquery_alias.meta_key LIKE %s " . $meta_compare_string_end;
$meta_compare_value = '%' . $wpdb->esc_like( trim( $clause['key'] ) ) . '%';
$where = $wpdb->prepare( $meta_compare_string, $meta_compare_value ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
break;
case 'NOT IN':
$array_subclause = '(' . substr( str_repeat( ',%s', count( $clause['key'] ) ), 1 ) . ') ';
$meta_compare_string = $meta_compare_string_start . "AND $subquery_alias.meta_key IN " . $array_subclause . $meta_compare_string_end;
$where = $wpdb->prepare( $meta_compare_string, $clause['key'] ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
break;
case 'NOT REGEXP':
$operator = $meta_compare_key;
if ( isset( $clause['type_key'] ) && 'BINARY' === strtoupper( $clause['type_key'] ) ) {
$cast = 'BINARY';
$meta_key = "CAST($subquery_alias.meta_key AS BINARY)";
} else {
$cast = '';
$meta_key = "$subquery_alias.meta_key";
}
$meta_compare_string = $meta_compare_string_start . "AND $meta_key REGEXP $cast %s " . $meta_compare_string_end;
$where = $wpdb->prepare( $meta_compare_string, $clause['key'] ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
break;
}
$sql_chunks['where'][] = $where;
}
}
// meta_value.
if ( array_key_exists( 'value', $clause ) ) {
$meta_value = $clause['value'];
if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true ) ) {
if ( ! is_array( $meta_value ) ) {
$meta_value = preg_split( '/[,\s]+/', $meta_value );
}
} elseif ( is_string( $meta_value ) ) {
$meta_value = trim( $meta_value );
}
switch ( $meta_compare ) {
case 'IN':
case 'NOT IN':
$meta_compare_string = '(' . substr( str_repeat( ',%s', count( $meta_value ) ), 1 ) . ')';
$where = $wpdb->prepare( $meta_compare_string, $meta_value );
break;
case 'BETWEEN':
case 'NOT BETWEEN':
$where = $wpdb->prepare( '%s AND %s', $meta_value[0], $meta_value[1] );
break;
case 'LIKE':
case 'NOT LIKE':
$meta_value = '%' . $wpdb->esc_like( $meta_value ) . '%';
$where = $wpdb->prepare( '%s', $meta_value );
break;
// EXISTS with a value is interpreted as '='.
case 'EXISTS':
$meta_compare = '=';
$where = $wpdb->prepare( '%s', $meta_value );
break;
// 'value' is ignored for NOT EXISTS.
case 'NOT EXISTS':
$where = '';
break;
default:
$where = $wpdb->prepare( '%s', $meta_value );
break;
}
if ( $where ) {
if ( 'CHAR' === $meta_type ) {
$sql_chunks['where'][] = "$alias.meta_value {$meta_compare} {$where}";
} else {
$sql_chunks['where'][] = "CAST($alias.meta_value AS {$meta_type}) {$meta_compare} {$where}";
}
}
}
/*
* Multiple WHERE clauses (for meta_key and meta_value) should
* be joined in parentheses.
*/
if ( 1 < count( $sql_chunks['where'] ) ) {
$sql_chunks['where'] = array( '( ' . implode( ' AND ', $sql_chunks['where'] ) . ' )' );
}
return $sql_chunks;
}
/**
* Gets a flattened list of sanitized meta clauses.
*
* This array should be used for clause lookup, as when the table alias and CAST type must be determined for
* a value of 'orderby' corresponding to a meta clause.
*
* @since 4.2.0
*
* @return array Meta clauses.
*/
public function get_clauses() {
return $this->clauses;
}
/**
* Identifies an existing table alias that is compatible with the current
* query clause.
*
* We avoid unnecessary table joins by allowing each clause to look for
* an existing table alias that is compatible with the query that it
* needs to perform.
*
* An existing alias is compatible if (a) it is a sibling of `$clause`
* (ie, it's under the scope of the same relation), and (b) the combination
* of operator and relation between the clauses allows for a shared table join.
* In the case of WP_Meta_Query, this only applies to 'IN' clauses that are
* connected by the relation 'OR'.
*
* @since 4.1.0
*
* @param array $clause Query clause.
* @param array $parent_query Parent query of $clause.
* @return string|false Table alias if found, otherwise false.
*/
protected function find_compatible_table_alias( $clause, $parent_query ) {
$alias = false;
foreach ( $parent_query as $sibling ) {
// If the sibling has no alias yet, there's nothing to check.
if ( empty( $sibling['alias'] ) ) {
continue;
}
// We're only interested in siblings that are first-order clauses.
if ( ! is_array( $sibling ) || ! $this->is_first_order_clause( $sibling ) ) {
continue;
}
$compatible_compares = array();
// Clauses connected by OR can share joins as long as they have "positive" operators.
if ( 'OR' === $parent_query['relation'] ) {
$compatible_compares = array( '=', 'IN', 'BETWEEN', 'LIKE', 'REGEXP', 'RLIKE', '>', '>=', '<', '<=' );
// Clauses joined by AND with "negative" operators share a join only if they also share a key.
} elseif ( isset( $sibling['key'] ) && isset( $clause['key'] ) && $sibling['key'] === $clause['key'] ) {
$compatible_compares = array( '!=', 'NOT IN', 'NOT LIKE' );
}
$clause_compare = strtoupper( $clause['compare'] );
$sibling_compare = strtoupper( $sibling['compare'] );
if ( in_array( $clause_compare, $compatible_compares, true ) && in_array( $sibling_compare, $compatible_compares, true ) ) {
$alias = preg_replace( '/\W/', '_', $sibling['alias'] );
break;
}
}
/**
* Filters the table alias identified as compatible with the current clause.
*
* @since 4.1.0
*
* @param string|false $alias Table alias, or false if none was found.
* @param array $clause First-order query clause.
* @param array $parent_query Parent of $clause.
* @param WP_Meta_Query $query WP_Meta_Query object.
*/
return apply_filters( 'meta_query_find_compatible_table_alias', $alias, $clause, $parent_query, $this );
}
/**
* Checks whether the current query has any OR relations.
*
* In some cases, the presence of an OR relation somewhere in the query will require
* the use of a `DISTINCT` or `GROUP BY` keyword in the `SELECT` clause. The current
* method can be used in these cases to determine whether such a clause is necessary.
*
* @since 4.3.0
*
* @return bool True if the query contains any `OR` relations, otherwise false.
*/
public function has_or_relation() {
return $this->has_or_relation;
}
}
/**
* WordPress Error API.
*
* @package WordPress
*/
/**
* WordPress Error class.
*
* Container for checking for WordPress errors and error messages. Return
* WP_Error and use is_wp_error() to check if this class is returned. Many
* core WordPress functions pass this class in the event of an error and
* if not handled properly will result in code errors.
*
* @since 2.1.0
*/
#[AllowDynamicProperties]
class WP_Error {
/**
* Stores the list of errors.
*
* @since 2.1.0
* @var array
*/
public $errors = array();
/**
* Stores the most recently added data for each error code.
*
* @since 2.1.0
* @var array
*/
public $error_data = array();
/**
* Stores previously added data added for error codes, oldest-to-newest by code.
*
* @since 5.6.0
* @var array[]
*/
protected $additional_data = array();
/**
* Initializes the error.
*
* If `$code` is empty, the other parameters will be ignored.
* When `$code` is not empty, `$message` will be used even if
* it is empty. The `$data` parameter will be used only if it
* is not empty.
*
* Though the class is constructed with a single error code and
* message, multiple codes can be added using the `add()` method.
*
* @since 2.1.0
*
* @param string|int $code Error code.
* @param string $message Error message.
* @param mixed $data Optional. Error data. Default empty string.
*/
public function __construct( $code = '', $message = '', $data = '' ) {
if ( empty( $code ) ) {
return;
}
$this->add( $code, $message, $data );
}
/**
* Retrieves all error codes.
*
* @since 2.1.0
*
* @return array List of error codes, if available.
*/
public function get_error_codes() {
if ( ! $this->has_errors() ) {
return array();
}
return array_keys( $this->errors );
}
/**
* Retrieves the first error code available.
*
* @since 2.1.0
*
* @return string|int Empty string, if no error codes.
*/
public function get_error_code() {
$codes = $this->get_error_codes();
if ( empty( $codes ) ) {
return '';
}
return $codes[0];
}
/**
* Retrieves all error messages, or the error messages for the given error code.
*
* @since 2.1.0
*
* @param string|int $code Optional. Error code to retrieve the messages for.
* Default empty string.
* @return string[] Error strings on success, or empty array if there are none.
*/
public function get_error_messages( $code = '' ) {
// Return all messages if no code specified.
if ( empty( $code ) ) {
$all_messages = array();
foreach ( (array) $this->errors as $code => $messages ) {
$all_messages = array_merge( $all_messages, $messages );
}
return $all_messages;
}
if ( isset( $this->errors[ $code ] ) ) {
return $this->errors[ $code ];
} else {
return array();
}
}
/**
* Gets a single error message.
*
* This will get the first message available for the code. If no code is
* given then the first code available will be used.
*
* @since 2.1.0
*
* @param string|int $code Optional. Error code to retrieve the message for.
* Default empty string.
* @return string The error message.
*/
public function get_error_message( $code = '' ) {
if ( empty( $code ) ) {
$code = $this->get_error_code();
}
$messages = $this->get_error_messages( $code );
if ( empty( $messages ) ) {
return '';
}
return $messages[0];
}
/**
* Retrieves the most recently added error data for an error code.
*
* @since 2.1.0
*
* @param string|int $code Optional. Error code. Default empty string.
* @return mixed Error data, if it exists.
*/
public function get_error_data( $code = '' ) {
if ( empty( $code ) ) {
$code = $this->get_error_code();
}
if ( isset( $this->error_data[ $code ] ) ) {
return $this->error_data[ $code ];
}
}
/**
* Verifies if the instance contains errors.
*
* @since 5.1.0
*
* @return bool If the instance contains errors.
*/
public function has_errors() {
if ( ! empty( $this->errors ) ) {
return true;
}
return false;
}
/**
* Adds an error or appends an additional message to an existing error.
*
* @since 2.1.0
*
* @param string|int $code Error code.
* @param string $message Error message.
* @param mixed $data Optional. Error data. Default empty string.
*/
public function add( $code, $message, $data = '' ) {
$this->errors[ $code ][] = $message;
if ( ! empty( $data ) ) {
$this->add_data( $data, $code );
}
/**
* Fires when an error is added to a WP_Error object.
*
* @since 5.6.0
*
* @param string|int $code Error code.
* @param string $message Error message.
* @param mixed $data Error data. Might be empty.
* @param WP_Error $wp_error The WP_Error object.
*/
do_action( 'wp_error_added', $code, $message, $data, $this );
}
/**
* Adds data to an error with the given code.
*
* @since 2.1.0
* @since 5.6.0 Errors can now contain more than one item of error data. {@see WP_Error::$additional_data}.
*
* @param mixed $data Error data.
* @param string|int $code Error code.
*/
public function add_data( $data, $code = '' ) {
if ( empty( $code ) ) {
$code = $this->get_error_code();
}
if ( isset( $this->error_data[ $code ] ) ) {
$this->additional_data[ $code ][] = $this->error_data[ $code ];
}
$this->error_data[ $code ] = $data;
}
/**
* Retrieves all error data for an error code in the order in which the data was added.
*
* @since 5.6.0
*
* @param string|int $code Error code.
* @return mixed[] Array of error data, if it exists.
*/
public function get_all_error_data( $code = '' ) {
if ( empty( $code ) ) {
$code = $this->get_error_code();
}
$data = array();
if ( isset( $this->additional_data[ $code ] ) ) {
$data = $this->additional_data[ $code ];
}
if ( isset( $this->error_data[ $code ] ) ) {
$data[] = $this->error_data[ $code ];
}
return $data;
}
/**
* Removes the specified error.
*
* This function removes all error messages associated with the specified
* error code, along with any error data for that code.
*
* @since 4.1.0
*
* @param string|int $code Error code.
*/
public function remove( $code ) {
unset( $this->errors[ $code ] );
unset( $this->error_data[ $code ] );
unset( $this->additional_data[ $code ] );
}
/**
* Merges the errors in the given error object into this one.
*
* @since 5.6.0
*
* @param WP_Error $error Error object to merge.
*/
public function merge_from( WP_Error $error ) {
static::copy_errors( $error, $this );
}
/**
* Exports the errors in this object into the given one.
*
* @since 5.6.0
*
* @param WP_Error $error Error object to export into.
*/
public function export_to( WP_Error $error ) {
static::copy_errors( $this, $error );
}
/**
* Copies errors from one WP_Error instance to another.
*
* @since 5.6.0
*
* @param WP_Error $from The WP_Error to copy from.
* @param WP_Error $to The WP_Error to copy to.
*/
protected static function copy_errors( WP_Error $from, WP_Error $to ) {
foreach ( $from->get_error_codes() as $code ) {
foreach ( $from->get_error_messages( $code ) as $error_message ) {
$to->add( $code, $error_message );
}
foreach ( $from->get_all_error_data( $code ) as $data ) {
$to->add_data( $data, $code );
}
}
}
}
/**
* Contains Translation_Entry class
*
* @version $Id: entry.php 1157 2015-11-20 04:30:11Z dd32 $
* @package pomo
* @subpackage entry
*/
if ( ! class_exists( 'Translation_Entry', false ) ) :
/**
* Translation_Entry class encapsulates a translatable string.
*
* @since 2.8.0
*/
#[AllowDynamicProperties]
class Translation_Entry {
/**
* Whether the entry contains a string and its plural form, default is false.
*
* @var bool
*/
public $is_plural = false;
public $context = null;
public $singular = null;
public $plural = null;
public $translations = array();
public $translator_comments = '';
public $extracted_comments = '';
public $references = array();
public $flags = array();
/**
* @param array $args {
* Arguments array, supports the following keys:
*
* @type string $singular The string to translate, if omitted an
* empty entry will be created.
* @type string $plural The plural form of the string, setting
* this will set `$is_plural` to true.
* @type array $translations Translations of the string and possibly
* its plural forms.
* @type string $context A string differentiating two equal strings
* used in different contexts.
* @type string $translator_comments Comments left by translators.
* @type string $extracted_comments Comments left by developers.
* @type array $references Places in the code this string is used, in
* relative_to_root_path/file.php:linenum form.
* @type array $flags Flags like php-format.
* }
*/
public function __construct( $args = array() ) {
// If no singular -- empty object.
if ( ! isset( $args['singular'] ) ) {
return;
}
// Get member variable values from args hash.
foreach ( $args as $varname => $value ) {
$this->$varname = $value;
}
if ( isset( $args['plural'] ) && $args['plural'] ) {
$this->is_plural = true;
}
if ( ! is_array( $this->translations ) ) {
$this->translations = array();
}
if ( ! is_array( $this->references ) ) {
$this->references = array();
}
if ( ! is_array( $this->flags ) ) {
$this->flags = array();
}
}
/**
* PHP4 constructor.
*
* @since 2.8.0
* @deprecated 5.4.0 Use __construct() instead.
*
* @see Translation_Entry::__construct()
*/
public function Translation_Entry( $args = array() ) {
_deprecated_constructor( self::class, '5.4.0', static::class );
self::__construct( $args );
}
/**
* Generates a unique key for this entry.
*
* @since 2.8.0
*
* @return string|false The key or false if the entry is null.
*/
public function key() {
if ( null === $this->singular ) {
return false;
}
// Prepend context and EOT, like in MO files.
$key = ! $this->context ? $this->singular : $this->context . "\4" . $this->singular;
// Standardize on \n line endings.
$key = str_replace( array( "\r\n", "\r" ), "\n", $key );
return $key;
}
/**
* Merges another translation entry with the current one.
*
* @since 2.8.0
*
* @param Translation_Entry $other Other translation entry.
*/
public function merge_with( &$other ) {
$this->flags = array_unique( array_merge( $this->flags, $other->flags ) );
$this->references = array_unique( array_merge( $this->references, $other->references ) );
if ( $this->extracted_comments !== $other->extracted_comments ) {
$this->extracted_comments .= $other->extracted_comments;
}
}
}
endif;
/**
* Object Cache API
*
* @link https://developer.wordpress.org/reference/classes/wp_object_cache/
*
* @package WordPress
* @subpackage Cache
*/
/** WP_Object_Cache class */
require_once ABSPATH . WPINC . '/class-wp-object-cache.php';
/**
* Sets up Object Cache Global and assigns it.
*
* @since 2.0.0
*
* @global WP_Object_Cache $wp_object_cache
*/
function wp_cache_init() {
$GLOBALS['wp_object_cache'] = new WP_Object_Cache();
}
/**
* Adds data to the cache, if the cache key doesn't already exist.
*
* @since 2.0.0
*
* @see WP_Object_Cache::add()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The cache key to use for retrieval later.
* @param mixed $data The data to add to the cache.
* @param string $group Optional. The group to add the cache to. Enables the same key
* to be used across groups. Default empty.
* @param int $expire Optional. When the cache data should expire, in seconds.
* Default 0 (no expiration).
* @return bool True on success, false if cache key and group already exist.
*/
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->add( $key, $data, $group, (int) $expire );
}
/**
* Adds multiple values to the cache in one call.
*
* @since 6.0.0
*
* @see WP_Object_Cache::add_multiple()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param array $data Array of keys and values to be set.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool[] Array of return values, grouped by key. Each value is either
* true on success, or false if cache key and group already exist.
*/
function wp_cache_add_multiple( array $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->add_multiple( $data, $group, $expire );
}
/**
* Replaces the contents of the cache with new data.
*
* @since 2.0.0
*
* @see WP_Object_Cache::replace()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The key for the cache data that should be replaced.
* @param mixed $data The new data to store in the cache.
* @param string $group Optional. The group for the cache data that should be replaced.
* Default empty.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool True if contents were replaced, false if original value does not exist.
*/
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->replace( $key, $data, $group, (int) $expire );
}
/**
* Saves the data to the cache.
*
* Differs from wp_cache_add() and wp_cache_replace() in that it will always write data.
*
* @since 2.0.0
*
* @see WP_Object_Cache::set()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The cache key to use for retrieval later.
* @param mixed $data The contents to store in the cache.
* @param string $group Optional. Where to group the cache contents. Enables the same key
* to be used across groups. Default empty.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool True on success, false on failure.
*/
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->set( $key, $data, $group, (int) $expire );
}
/**
* Sets multiple values to the cache in one call.
*
* @since 6.0.0
*
* @see WP_Object_Cache::set_multiple()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param array $data Array of keys and values to be set.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool[] Array of return values, grouped by key. Each value is either
* true on success, or false on failure.
*/
function wp_cache_set_multiple( array $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->set_multiple( $data, $group, $expire );
}
/**
* Retrieves the cache contents from the cache by key and group.
*
* @since 2.0.0
*
* @see WP_Object_Cache::get()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The key under which the cache contents are stored.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @param bool $force Optional. Whether to force an update of the local cache
* from the persistent cache. Default false.
* @param bool $found Optional. Whether the key was found in the cache (passed by reference).
* Disambiguates a return of false, a storable value. Default null.
* @return mixed|false The cache contents on success, false on failure to retrieve contents.
*/
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
global $wp_object_cache;
return $wp_object_cache->get( $key, $group, $force, $found );
}
/**
* Retrieves multiple values from the cache in one call.
*
* @since 5.5.0
*
* @see WP_Object_Cache::get_multiple()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param array $keys Array of keys under which the cache contents are stored.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @param bool $force Optional. Whether to force an update of the local cache
* from the persistent cache. Default false.
* @return array Array of return values, grouped by key. Each value is either
* the cache contents on success, or false on failure.
*/
function wp_cache_get_multiple( $keys, $group = '', $force = false ) {
global $wp_object_cache;
return $wp_object_cache->get_multiple( $keys, $group, $force );
}
/**
* Removes the cache contents matching key and group.
*
* @since 2.0.0
*
* @see WP_Object_Cache::delete()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key What the contents in the cache are called.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @return bool True on successful removal, false on failure.
*/
function wp_cache_delete( $key, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->delete( $key, $group );
}
/**
* Deletes multiple values from the cache in one call.
*
* @since 6.0.0
*
* @see WP_Object_Cache::delete_multiple()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param array $keys Array of keys under which the cache to deleted.
* @param string $group Optional. Where the cache contents are grouped. Default empty.
* @return bool[] Array of return values, grouped by key. Each value is either
* true on success, or false if the contents were not deleted.
*/
function wp_cache_delete_multiple( array $keys, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->delete_multiple( $keys, $group );
}
/**
* Increments numeric cache item's value.
*
* @since 3.3.0
*
* @see WP_Object_Cache::incr()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The key for the cache contents that should be incremented.
* @param int $offset Optional. The amount by which to increment the item's value.
* Default 1.
* @param string $group Optional. The group the key is in. Default empty.
* @return int|false The item's new value on success, false on failure.
*/
function wp_cache_incr( $key, $offset = 1, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->incr( $key, $offset, $group );
}
/**
* Decrements numeric cache item's value.
*
* @since 3.3.0
*
* @see WP_Object_Cache::decr()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int|string $key The cache key to decrement.
* @param int $offset Optional. The amount by which to decrement the item's value.
* Default 1.
* @param string $group Optional. The group the key is in. Default empty.
* @return int|false The item's new value on success, false on failure.
*/
function wp_cache_decr( $key, $offset = 1, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->decr( $key, $offset, $group );
}
/**
* Removes all cache items.
*
* @since 2.0.0
*
* @see WP_Object_Cache::flush()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @return bool True on success, false on failure.
*/
function wp_cache_flush() {
global $wp_object_cache;
return $wp_object_cache->flush();
}
/**
* Removes all cache items from the in-memory runtime cache.
*
* @since 6.0.0
*
* @see WP_Object_Cache::flush()
*
* @return bool True on success, false on failure.
*/
function wp_cache_flush_runtime() {
return wp_cache_flush();
}
/**
* Removes all cache items in a group, if the object cache implementation supports it.
*
* Before calling this function, always check for group flushing support using the
* `wp_cache_supports( 'flush_group' )` function.
*
* @since 6.1.0
*
* @see WP_Object_Cache::flush_group()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param string $group Name of group to remove from cache.
* @return bool True if group was flushed, false otherwise.
*/
function wp_cache_flush_group( $group ) {
global $wp_object_cache;
return $wp_object_cache->flush_group( $group );
}
/**
* Determines whether the object cache implementation supports a particular feature.
*
* @since 6.1.0
*
* @param string $feature Name of the feature to check for. Possible values include:
* 'add_multiple', 'set_multiple', 'get_multiple', 'delete_multiple',
* 'flush_runtime', 'flush_group'.
* @return bool True if the feature is supported, false otherwise.
*/
function wp_cache_supports( $feature ) {
switch ( $feature ) {
case 'add_multiple':
case 'set_multiple':
case 'get_multiple':
case 'delete_multiple':
case 'flush_runtime':
case 'flush_group':
return true;
default:
return false;
}
}
/**
* Closes the cache.
*
* This function has ceased to do anything since WordPress 2.5. The
* functionality was removed along with the rest of the persistent cache.
*
* This does not mean that plugins can't implement this function when they need
* to make sure that the cache is cleaned up after WordPress no longer needs it.
*
* @since 2.0.0
*
* @return true Always returns true.
*/
function wp_cache_close() {
return true;
}
/**
* Adds a group or set of groups to the list of global groups.
*
* @since 2.6.0
*
* @see WP_Object_Cache::add_global_groups()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param string|string[] $groups A group or an array of groups to add.
*/
function wp_cache_add_global_groups( $groups ) {
global $wp_object_cache;
$wp_object_cache->add_global_groups( $groups );
}
/**
* Adds a group or set of groups to the list of non-persistent groups.
*
* @since 2.6.0
*
* @param string|string[] $groups A group or an array of groups to add.
*/
function wp_cache_add_non_persistent_groups( $groups ) {
// Default cache doesn't persist so nothing to do here.
}
/**
* Switches the internal blog ID.
*
* This changes the blog id used to create keys in blog specific groups.
*
* @since 3.5.0
*
* @see WP_Object_Cache::switch_to_blog()
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*
* @param int $blog_id Site ID.
*/
function wp_cache_switch_to_blog( $blog_id ) {
global $wp_object_cache;
$wp_object_cache->switch_to_blog( $blog_id );
}
/**
* Resets internal cache keys and structures.
*
* If the cache back end uses global blog or site IDs as part of its cache keys,
* this function instructs the back end to reset those keys and perform any cleanup
* since blog or site IDs have changed since cache init.
*
* This function is deprecated. Use wp_cache_switch_to_blog() instead of this
* function when preparing the cache for a blog switch. For clearing the cache
* during unit tests, consider using wp_cache_init(). wp_cache_init() is not
* recommended outside of unit tests as the performance penalty for using it is high.
*
* @since 3.0.0
* @deprecated 3.5.0 Use wp_cache_switch_to_blog()
* @see WP_Object_Cache::reset()
*
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*/
function wp_cache_reset() {
_deprecated_function( __FUNCTION__, '3.5.0', 'wp_cache_switch_to_blog()' );
global $wp_object_cache;
$wp_object_cache->reset();
}