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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 2575 | |
| 2576 | /** |
| 2577 | * Filters the SELECT clause of the query. |
| 2578 | * |
| 2579 | * @since 2.1.0 |
| 2580 | * |
| 2581 | * @param string $fields The SELECT clause of the query. |
| 2582 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 2583 | */ |
| 2584 | $fields = apply_filters_ref_array( 'posts_fields', array( $fields, &$this ) ); |
| 2585 | |
| 2586 | /** |
| 2587 | * Filters all query clauses at once, for convenience. |
| 2588 | * |
| 2589 | * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT, |
| 2590 | * fields (SELECT), and LIMITS clauses. |
| 2591 | * |
| 2592 | * @since 3.1.0 |
| 2593 | * |