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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 |
|---|---|
| 515 | } |
| 516 | |
| 517 | return; |
| 518 | } |
| 519 | |
| 520 | if ( ! isset( $wp_filter['all'] ) ) { |
| 521 | $wp_current_filter[] = $hook_name; |
| 522 | } |
| 523 | |
| 524 | $wp_filter[ $hook_name ]->do_action( $args ); |
| 525 | |
| 526 | array_pop( $wp_current_filter ); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Checks if any action has been registered for a hook. |
| 531 | * |
| 532 | * When using the `$callback` argument, this function may return a non-boolean value |
| 533 | * that evaluates to false (e.g. 0), so use the `===` operator for testing the return value. |