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78 * @subpackage Plugin |
78 * @subpackage Plugin |
79 * @since 2.5 |
79 * @since 2.5 |
80 * @global array $wp_filter Stores all of the filters |
80 * @global array $wp_filter Stores all of the filters |
81 * |
81 * |
82 * @param string $tag The name of the filter hook. |
82 * @param string $tag The name of the filter hook. |
83 * @param callback $function_to_check optional. If specified, return the priority of that function on this hook or false if not attached. |
83 * @param callback $function_to_check optional. |
84 * @return int|boolean Optionally returns the priority on that hook for the specified function. |
84 * @return mixed If $function_to_check is omitted, returns boolean for whether the hook has anything registered. |
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85 * When checking a specific function, the priority of that hook is returned, or false if the function is not attached. |
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86 * When using the $function_to_check argument, this function may return a non-boolean value that evaluates to false |
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87 * (e.g.) 0, so use the === operator for testing the return value. |
85 */ |
88 */ |
86 function has_filter($tag, $function_to_check = false) { |
89 function has_filter($tag, $function_to_check = false) { |
87 global $wp_filter; |
90 global $wp_filter; |
88 |
91 |
89 $has = !empty($wp_filter[$tag]); |
92 $has = !empty($wp_filter[$tag]); |
252 * @param callback $function_to_remove The name of the function which should be removed. |
255 * @param callback $function_to_remove The name of the function which should be removed. |
253 * @param int $priority optional. The priority of the function (default: 10). |
256 * @param int $priority optional. The priority of the function (default: 10). |
254 * @param int $accepted_args optional. The number of arguments the function accepts (default: 1). |
257 * @param int $accepted_args optional. The number of arguments the function accepts (default: 1). |
255 * @return boolean Whether the function existed before it was removed. |
258 * @return boolean Whether the function existed before it was removed. |
256 */ |
259 */ |
257 function remove_filter($tag, $function_to_remove, $priority = 10, $accepted_args = 1) { |
260 function remove_filter( $tag, $function_to_remove, $priority = 10 ) { |
258 $function_to_remove = _wp_filter_build_unique_id($tag, $function_to_remove, $priority); |
261 $function_to_remove = _wp_filter_build_unique_id($tag, $function_to_remove, $priority); |
259 |
262 |
260 $r = isset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]); |
263 $r = isset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]); |
261 |
264 |
262 if ( true === $r) { |
265 if ( true === $r) { |
495 * @subpackage Plugin |
498 * @subpackage Plugin |
496 * @since 2.5 |
499 * @since 2.5 |
497 * @see has_filter() has_action() is an alias of has_filter(). |
500 * @see has_filter() has_action() is an alias of has_filter(). |
498 * |
501 * |
499 * @param string $tag The name of the action hook. |
502 * @param string $tag The name of the action hook. |
500 * @param callback $function_to_check optional. If specified, return the priority of that function on this hook or false if not attached. |
503 * @param callback $function_to_check optional. |
501 * @return int|boolean Optionally returns the priority on that hook for the specified function. |
504 * @return mixed If $function_to_check is omitted, returns boolean for whether the hook has anything registered. |
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505 * When checking a specific function, the priority of that hook is returned, or false if the function is not attached. |
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506 * When using the $function_to_check argument, this function may return a non-boolean value that evaluates to false |
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507 * (e.g.) 0, so use the === operator for testing the return value. |
502 */ |
508 */ |
503 function has_action($tag, $function_to_check = false) { |
509 function has_action($tag, $function_to_check = false) { |
504 return has_filter($tag, $function_to_check); |
510 return has_filter($tag, $function_to_check); |
505 } |
511 } |
506 |
512 |
516 * @since 1.2 |
522 * @since 1.2 |
517 * |
523 * |
518 * @param string $tag The action hook to which the function to be removed is hooked. |
524 * @param string $tag The action hook to which the function to be removed is hooked. |
519 * @param callback $function_to_remove The name of the function which should be removed. |
525 * @param callback $function_to_remove The name of the function which should be removed. |
520 * @param int $priority optional The priority of the function (default: 10). |
526 * @param int $priority optional The priority of the function (default: 10). |
521 * @param int $accepted_args optional. The number of arguments the function accepts (default: 1). |
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522 * @return boolean Whether the function is removed. |
527 * @return boolean Whether the function is removed. |
523 */ |
528 */ |
524 function remove_action($tag, $function_to_remove, $priority = 10, $accepted_args = 1) { |
529 function remove_action( $tag, $function_to_remove, $priority = 10 ) { |
525 return remove_filter($tag, $function_to_remove, $priority, $accepted_args); |
530 return remove_filter( $tag, $function_to_remove, $priority ); |
526 } |
531 } |
527 |
532 |
528 /** |
533 /** |
529 * Remove all of the hooks from an action. |
534 * Remove all of the hooks from an action. |
530 * |
535 * |