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Version of `add_filter()` for WordPress that only runs once
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| <?php | |
| /* | |
| Use this just like `add_filter()`, and then run something that calls the filter (like | |
| `new WP_Query`, maybe). | |
| That's it. If the filter gets called again, your callback will not be. | |
| This works around the common "filter sandwich" pattern where you have to remember to | |
| call `remove_filter` again after your call. | |
| */ | |
| function add_suicidal_filter( $hook, $callback, $priority = 10, $params = 1 ) { | |
| add_filter( $hook, function( $first_arg ) use( $callback ) { | |
| static $ran = false; | |
| if ( $ran ) { | |
| return $first_arg; | |
| } | |
| $ran = true; | |
| return call_user_func_array( $callback, func_get_args() ); | |
| }, $priority, $params ); | |
| } |
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