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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 |
|---|---|
| 2139 | } |
| 2140 | |
| 2141 | /** |
| 2142 | * Filters the dbDelta SQL queries. |
| 2143 | * |
| 2144 | * @since 3.3.0 |
| 2145 | * |
| 2146 | * @param array $queries An array of dbDelta SQL queries. |
| 2147 | */ |
| 2148 | $queries = apply_filters( 'dbdelta_queries', $queries ); |
| 2149 | |
| 2150 | $cqueries = array(); // Creation Queries |
| 2151 | $iqueries = array(); // Insertion Queries |
| 2152 | $for_update = array(); |
| 2153 | |
| 2154 | // Create a tablename index for an array ($cqueries) of queries |
| 2155 | foreach ($queries as $qry) { |
| 2156 | if ( preg_match( "|CREATE TABLE ([^ ]*)|", $qry, $matches ) ) { |
| 2157 | $cqueries[ trim( $matches[1], '`' ) ] = $qry; |