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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 |
|---|---|
| 63 | if ( ! empty( $_GET['action'] ) && in_array( $_GET['action'], $core_actions_get ) ) |
| 64 | add_action( 'wp_ajax_' . $_GET['action'], 'wp_ajax_' . str_replace( '-', '_', $_GET['action'] ), 1 ); |
| 65 | |
| 66 | if ( ! empty( $_POST['action'] ) && in_array( $_POST['action'], $core_actions_post ) ) |
| 67 | add_action( 'wp_ajax_' . $_POST['action'], 'wp_ajax_' . str_replace( '-', '_', $_POST['action'] ), 1 ); |
| 68 | |
| 69 | add_action( 'wp_ajax_nopriv_autosave', 'wp_ajax_nopriv_autosave', 1 ); |
| 70 | |
| 71 | if ( is_user_logged_in() ) |
| 72 | do_action( 'wp_ajax_' . $_REQUEST['action'] ); // Authenticated actions |
| 73 | else |
| 74 | do_action( 'wp_ajax_nopriv_' . $_REQUEST['action'] ); // Non-admin actions |
| 75 | |
| 76 | // Default status |
| 77 | die( '0' ); |
| 78 | |