Hooks.php (1400B)
1 <?php 2 /** 3 * Handles adding and dispatching events 4 * 5 * @package Requests 6 * @subpackage Utilities 7 */ 8 9 /** 10 * Handles adding and dispatching events 11 * 12 * @package Requests 13 * @subpackage Utilities 14 */ 15 class Requests_Hooks implements Requests_Hooker { 16 /** 17 * Registered callbacks for each hook 18 * 19 * @var array 20 */ 21 protected $hooks = array(); 22 23 /** 24 * Constructor 25 */ 26 public function __construct() { 27 // pass 28 } 29 30 /** 31 * Register a callback for a hook 32 * 33 * @param string $hook Hook name 34 * @param callback $callback Function/method to call on event 35 * @param int $priority Priority number. <0 is executed earlier, >0 is executed later 36 */ 37 public function register($hook, $callback, $priority = 0) { 38 if (!isset($this->hooks[$hook])) { 39 $this->hooks[$hook] = array(); 40 } 41 if (!isset($this->hooks[$hook][$priority])) { 42 $this->hooks[$hook][$priority] = array(); 43 } 44 45 $this->hooks[$hook][$priority][] = $callback; 46 } 47 48 /** 49 * Dispatch a message 50 * 51 * @param string $hook Hook name 52 * @param array $parameters Parameters to pass to callbacks 53 * @return boolean Successfulness 54 */ 55 public function dispatch($hook, $parameters = array()) { 56 if (empty($this->hooks[$hook])) { 57 return false; 58 } 59 60 foreach ($this->hooks[$hook] as $priority => $hooked) { 61 foreach ($hooked as $callback) { 62 call_user_func_array($callback, $parameters); 63 } 64 } 65 66 return true; 67 } 68 }