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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 |
|---|---|
| 3549 | /** |
| 3550 | * Filters the array of retrieved posts after they've been fetched and |
| 3551 | * internally processed. |
| 3552 | * |
| 3553 | * @since 1.5.0 |
| 3554 | * |
| 3555 | * @param WP_Post[] $posts Array of post objects. |
| 3556 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 3557 | */ |
| 3558 | $this->posts = apply_filters_ref_array( 'the_posts', array( $this->posts, &$this ) ); |
| 3559 | } |
| 3560 | |
| 3561 | /* |
| 3562 | * Ensure that any posts added/modified via one of the filters above are |
| 3563 | * of the type WP_Post and are filtered. |
| 3564 | */ |
| 3565 | if ( $this->posts ) { |
| 3566 | $this->post_count = count( $this->posts ); |
| 3567 | |