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Description
Execute functions hooked on a specific action hook.
This function invokes all functions attached to action hook `$tag`. It is possible to create new action hooks by simply calling this function, specifying the name of the new hook using the $tag
parameter.
You can pass extra arguments to the hooks, much like you can with apply_filters().
Usage
do_action( $tag, $arg );
Parameters
- $tag
- ( string ) required – The name of the action to be executed.
- $arg
- ( mixed ) optional –
Returns
void
Source
File name: wordpress/wp-includes/plugin.php
Lines: 1 to 36 of 36
function do_action($tag, $arg = '') { global $wp_filter, $wp_actions, $wp_current_filter; if ( ! isset($wp_actions[$tag]) ) $wp_actions[$tag] = 1; else ++$wp_actions[$tag]; // Do 'all' actions first if ( isset($wp_filter['all']) ) { $wp_current_filter[] = $tag; $all_args = func_get_args(); _wp_call_all_hook($all_args); } if ( !isset($wp_filter[$tag]) ) { if ( isset($wp_filter['all']) ) array_pop($wp_current_filter); return; } if ( !isset($wp_filter['all']) ) $wp_current_filter[] = $tag; $args = array(); if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this) $args[] =& $arg[0]; else $args[] = $arg; for ( $a = 2, $num = func_num_args(); $a < $num; $a++ ) $args[] = func_get_arg($a); $wp_filter[ $tag ]->do_action( $args ); array_pop($wp_current_filter); }