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<?php class BaseObserver { protected $events = array(); public function register($callable, $event){ if (!isset($this->events[$event])) { $this->events[$event] = array(); } $this->events[$event][] = $callable; } public function notify($event, $params = array()) { if (isset($this->events[$event])) { foreach ($this->events[$event] AS $callable){ call_user_func_array($callable, $params); } } } } function print_meta($p1, $p2) { echo $p1 . ' ' . $p2; } function multiply_meta($p1, $p2) { echo $p1 * $p2; } function add_meta($p1, $p2) { echo $p1 + $p2; } $observer = new BaseObserver(); $observer->register('print_meta', 'event1'); $observer->register('multiple_meta', 'event1'); $observer->register('print_meta', 'event2'); $observer->register('add_meta', 'event2'); $observer->register('multiple_meta', 'event3'); $observer->register('add_meta', 'event3'); $observer->notify('event1', array(1, 2)); $observer->notify('event2', array(3, 4)); $observer->notify('event3', array(5, 6));
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
1 2 Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "multiple_meta" not found or invalid function name in /in/MoKSH:14 Stack trace: #0 /in/MoKSH(40): BaseObserver->notify('event1', Array) #1 {main} thrown in /in/MoKSH on line 14
Process exited with code 255.
Output for 8.0.0 - 8.0.9
1 2 Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($function) must be a valid callback, function "multiple_meta" not found or invalid function name in /in/MoKSH:14 Stack trace: #0 /in/MoKSH(40): BaseObserver->notify('event1', Array) #1 {main} thrown in /in/MoKSH on line 14
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
1 2 Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'multiple_meta' not found or invalid function name in /in/MoKSH on line 14 3 47 Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'multiple_meta' not found or invalid function name in /in/MoKSH on line 14 11
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
1 2 Warning: call_user_func_array(): First argument is expected to be a valid callback, 'multiple_meta' was given in /in/MoKSH on line 14 3 47 Warning: call_user_func_array(): First argument is expected to be a valid callback, 'multiple_meta' was given in /in/MoKSH on line 14 11
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/MoKSH on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/MoKSH on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/MoKSH on line 4
Process exited with code 255.
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