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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 |
|---|---|
| 1162 | /** |
| 1163 | * Fires once the AJAX request has been validated or not. |
| 1164 | * |
| 1165 | * @since 2.1.0 |
| 1166 | * |
| 1167 | * @param string $action The AJAX nonce action. |
| 1168 | * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between |
| 1169 | * 0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago. |
| 1170 | */ |
| 1171 | do_action( 'check_ajax_referer', $action, $result ); |
| 1172 | |
| 1173 | if ( $die && false === $result ) { |
| 1174 | if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { |
| 1175 | wp_die( -1 ); |
| 1176 | } else { |
| 1177 | die( '-1' ); |
| 1178 | } |
| 1179 | } |
| 1180 | |