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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 |
|---|---|
| 3001 | * Filters the LIMIT clause of the query. |
| 3002 | * |
| 3003 | * For use by caching plugins. |
| 3004 | * |
| 3005 | * @since 2.5.0 |
| 3006 | * |
| 3007 | * @param string $limits The LIMIT clause of the query. |
| 3008 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 3009 | */ |
| 3010 | $limits = apply_filters_ref_array( 'post_limits_request', array( $limits, &$this ) ); |
| 3011 | |
| 3012 | /** |
| 3013 | * Filters all query clauses at once, for convenience. |
| 3014 | * |
| 3015 | * For use by caching plugins. |
| 3016 | * |
| 3017 | * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT, |
| 3018 | * fields (SELECT), and LIMIT clauses. |
| 3019 | * |