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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 |
|---|---|
| 2747 | |
| 2748 | /** |
| 2749 | * Filters the LIMIT clause of the query. |
| 2750 | * |
| 2751 | * @since 2.1.0 |
| 2752 | * |
| 2753 | * @param string $limits The LIMIT clause of the query. |
| 2754 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 2755 | */ |
| 2756 | $limits = apply_filters_ref_array( 'post_limits', array( $limits, &$this ) ); |
| 2757 | |
| 2758 | /** |
| 2759 | * Filters the SELECT clause of the query. |
| 2760 | * |
| 2761 | * @since 2.1.0 |
| 2762 | * |
| 2763 | * @param string $fields The SELECT clause of the query. |
| 2764 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 2765 | */ |