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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 |
|---|---|
| 508 | } |
| 509 | |
| 510 | if ( empty( $arg ) ) { |
| 511 | $arg[] = ''; |
| 512 | } elseif ( is_array( $arg[0] ) && 1 === count( $arg[0] ) && isset( $arg[0][0] ) && is_object( $arg[0][0] ) ) { |
| 513 | // Backward compatibility for PHP4-style passing of `array( &$this )` as action `$arg`. |
| 514 | $arg[0] = $arg[0][0]; |
| 515 | } |
| 516 | |
| 517 | $wp_filter[ $hook_name ]->do_action( $arg ); |
| 518 | |
| 519 | array_pop( $wp_current_filter ); |
| 520 | } |
| 521 | |
| 522 | /** |
| 523 | * Calls the callback functions that have been added to an action hook, specifying arguments in an array. |
| 524 | * |
| 525 | * @since 2.1.0 |
| 526 | * |