Action hook 'example_action'

in WP Core File wp-includes/plugin.php at line 468

View Source

example_action

Action Hook
Description
Adds a callback function to an action hook. Actions are the hooks that the WordPress core launches at specific points during execution, or when specific events occur. Plugins can specify that one or more of its PHP functions are executed at these points, using the Action API.

Hook Information

File Location wp-includes/plugin.php View on GitHub
Hook Type Action
Line Number 468

Hook Parameters

Type Name Description
string $hook_name The name of the action to add the callback to.
callable $callback The callback to be run when the action is called.
int $priority Optional. Used to specify the order in which the functions associated with a particular action are executed. Lower numbers correspond with earlier execution, and functions with the same priority are executed in the order in which they were added to the action. Default 10.
int $accepted_args Optional. The number of arguments the function accepts. Default 1.

Usage Examples

Basic Usage
<?php
// Hook into example_action
add_action('example_action', 'my_custom_function', 10, 4);

function my_custom_function($hook_name, $callback, $priority, $accepted_args) {
    // Your custom code here
}

Source Code Context

wp-includes/plugin.php:468 - How this hook is used in WordPress core
<?php
 463   *      * Trigger the actions by calling the 'example_callback()' function
 464   *      * that's hooked onto `example_action` above.
 465   *      *
 466   *      * - 'example_action' is the action hook.
 467   *      * - $arg1 and $arg2 are the additional arguments passed to the callback.
 468   *     do_action( 'example_action', $arg1, $arg2 );
 469   *
 470   * @since 1.2.0
 471   * @since 5.3.0 Formalized the existing and already documented `...$arg` parameter
 472   *              by adding it to the function signature.
 473   *

PHP Documentation

<?php
/**
 * Adds a callback function to an action hook.
 *
 * Actions are the hooks that the WordPress core launches at specific points
 * during execution, or when specific events occur. Plugins can specify that
 * one or more of its PHP functions are executed at these points, using the
 * Action API.
 *
 * @since 1.2.0
 *
 * @param string   $hook_name       The name of the action to add the callback to.
 * @param callable $callback        The callback to be run when the action is called.
 * @param int      $priority        Optional. Used to specify the order in which the functions
 *                                  associated with a particular action are executed.
 *                                  Lower numbers correspond with earlier execution,
 *                                  and functions with the same priority are executed
 *                                  in the order in which they were added to the action. Default 10.
 * @param int      $accepted_args   Optional. The number of arguments the function accepts. Default 1.
 * @return true Always returns true.
 */
Quick Info
  • Hook Type: Action
  • Parameters: 4
  • File: wp-includes/plugin.php
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