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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 |
|---|---|
| 809 | _doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.2' ); |
| 810 | |
| 811 | $adminurl = strtolower(admin_url()); |
| 812 | $referer = strtolower(wp_get_referer()); |
| 813 | $result = isset($_REQUEST[$query_arg]) ? wp_verify_nonce($_REQUEST[$query_arg], $action) : false; |
| 814 | if ( !$result && !(-1 == $action && strpos($referer, $adminurl) === 0) ) { |
| 815 | wp_nonce_ays($action); |
| 816 | die(); |
| 817 | } |
| 818 | do_action('check_admin_referer', $action, $result); |
| 819 | return $result; |
| 820 | } |
| 821 | endif; |
| 822 | |
| 823 | if ( !function_exists('check_ajax_referer') ) : |
| 824 | /** |
| 825 | * Verifies the AJAX request to prevent processing requests external of the blog. |
| 826 | * |
| 827 | * @since 2.0.3 |