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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 |
|---|---|
| 3594 | /** |
| 3595 | * Filter the array of retrieved posts after they've been fetched and |
| 3596 | * internally processed. |
| 3597 | * |
| 3598 | * @since 1.5.0 |
| 3599 | * |
| 3600 | * @param array $posts The array of retrieved posts. |
| 3601 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 3602 | */ |
| 3603 | $this->posts = apply_filters_ref_array( 'the_posts', array( $this->posts, &$this ) ); |
| 3604 | } |
| 3605 | |
| 3606 | // Ensure that any posts added/modified via one of the filters above are |
| 3607 | // of the type WP_Post and are filtered. |
| 3608 | if ( $this->posts ) { |
| 3609 | $this->post_count = count( $this->posts ); |
| 3610 | |
| 3611 | $this->posts = array_map( 'get_post', $this->posts ); |
| 3612 | |