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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1075 | * |
| 1076 | * @type array $clauses Array containing the query's JOIN and WHERE clauses. |
| 1077 | * @type array $queries Array of meta queries. |
| 1078 | * @type string $type Type of meta. |
| 1079 | * @type string $primary_table Primary table. |
| 1080 | * @type string $primary_id_column Primary column ID. |
| 1081 | * @type object $context The main query object. |
| 1082 | * } |
| 1083 | */ |
| 1084 | return apply_filters_ref_array( 'get_meta_sql', array( compact( 'join', 'where' ), $this->queries, $type, $primary_table, $primary_id_column, $context ) ); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /** |
| 1089 | * Retrieve the name of the metadata table for the specified object type. |
| 1090 | * |
| 1091 | * @since 2.9.0 |
| 1092 | * @uses $wpdb WordPress database object for queries. |
| 1093 | * |