adige Posted October 9, 2010 Share Posted October 9, 2010 Hi everyone,I want to learn PHP hook and I try hook examples.I tired this example but I saw only white page.It has a problem but I can't understand it Codes; hook.php <?php class Hooks { public function add($hook,$class=null,$method=null,$args=null) { if (empty($method)) error("You must include a method (function) when defining add_hook."); $this->hooks[$hook][]=array((!empty($class)?array($class,$method):$method),$args); return $this; } public function clear($hook=null) { if (!empty($hook)) unset($this->hooks[$hook]); else $this->hooks=null; } public function run($hook) { if (empty($this->hooks[$hook])) return $this; foreach ($this->hooks[$hook] as $hkey=>$hvalue) { if (is_array($hvalue[0])) $hvalue[0]=array($hvalue[0][0],$hvalue[0][1]); if (!empty($hvalue[1])) if (!is_array($hvalue[1])) call_user_func($hvalue[0],$hvalue[1]); else call_user_func_array($hvalue[0],$hvalue[1]); else call_user_func($hvalue[0]); } return $this; } } ?> script.php <?php // For a function: function doTitle() { echo $current->title; } $hooks->add('head_title',null,'doTitle'); // For a class: class Output { function body_final() { echo implode("\n",$this->body); } } $hooks->add('page_body','Output','body_final'); // To pass multiple arguments into a function, you must use: function test($arg1,$arg2) { echo "Arg1: {$arg1}, Arg2: {$arg2}"; } $hooks->add('page_body',null,'test',array('test','ing')); ?> index.php <?php // You must include the hook file here, or you can make an includes file to do all of your startup (as is normally done). include 'hook.php'; include 'script.php'; ?><!DOCTYPE html> <html> <head> <?php run('head_meta'); ?> <title><?php $hooks->run('head_title'); ?></title> <?php $hooks->run('head_links'); $hooks->run('head_scripts'); ?> </head> <body> <?php $hooks->run('page_body'); ?> </body> </html> Thank you Quote Link to comment Share on other sites More sharing options...
Pikachu2000 Posted October 9, 2010 Share Posted October 9, 2010 If you haven't done so already, turn on error reporting or logging and see if there are errors. Quote Link to comment Share on other sites More sharing options...
adige Posted October 9, 2010 Author Share Posted October 9, 2010 Thank you for your answer but I don't see any error :S Quote Link to comment Share on other sites More sharing options...
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