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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 |
|---|---|
| 1149 | /** |
| 1150 | * Fires once the AJAX request has been validated or not. |
| 1151 | * |
| 1152 | * @since 2.1.0 |
| 1153 | * |
| 1154 | * @param string $action The AJAX nonce action. |
| 1155 | * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between |
| 1156 | * 0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago. |
| 1157 | */ |
| 1158 | do_action( 'check_ajax_referer', $action, $result ); |
| 1159 | |
| 1160 | return $result; |
| 1161 | } |
| 1162 | endif; |
| 1163 | |
| 1164 | if ( !function_exists('wp_redirect') ) : |
| 1165 | /** |
| 1166 | * Redirects to another page. |
| 1167 | * |