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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 |
|---|---|
| 2918 | } |
| 2919 | |
| 2920 | /** |
| 2921 | * Filters the dbDelta SQL queries. |
| 2922 | * |
| 2923 | * @since 3.3.0 |
| 2924 | * |
| 2925 | * @param string[] $queries An array of dbDelta SQL queries. |
| 2926 | */ |
| 2927 | $queries = apply_filters( 'dbdelta_queries', $queries ); |
| 2928 | |
| 2929 | $cqueries = array(); // Creation queries. |
| 2930 | $iqueries = array(); // Insertion queries. |
| 2931 | $for_update = array(); |
| 2932 | |
| 2933 | // Create a tablename index for an array ($cqueries) of recognized query types. |
| 2934 | foreach ( $queries as $qry ) { |
| 2935 | if ( preg_match( '|CREATE TABLE ([^ ]*)|', $qry, $matches ) ) { |
| 2936 | $table_name = trim( $matches[1], '`' ); |