Instructions for using hooks under the CI framework and their functions

//hooks source code
//hooks are hooks, their main function is to extend base_system under the CI framework, and their main function is when CI starts,
//Run some methods defined by developers to achieve some specific functions
//Method definition defined in application/config/hooks.php to be started when CI starts
$hook['pre_controller'][] = array(
                                                                                                                                                                                                     'class'                                                                                                                                                                                                                                                                                                                      'function' => 'Myfunction',
                                                                                                                                                                                                                                         'filename' => 'Myclass.php',
                                                                                                                                                                                                                                             'filepath' => 'hooks',
                                                                                                                                                                                                                                                                                                                                                                                                               

$hook['pre_controller'][] = array(
'Class' = & gt; 'myotherclass',
'FMCTION' = & GT; 'Myotherfunction',
                                                                                                                                                                                                                                         'filename' => 'Myotherclass.php',
                                                                                                                                                                                                                                             'filepath' => 'hooks',
                                                                                                                                                                                                                                                                                                                                                                                           

//hooks source code First determine whether hooks (i.e. a custom array similar to the one above) exists or is a two-digit array
if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0])){


//If yes, loop and run run_hook


foreach ($this->hooks[$which] as $val){
$this->_run_hook($val);
} }else{
//If not, run hooks directly

$this->_run_hook($this->hooks[$which]); }
//Set $this->in_progress = TRUE; below to prevent calling a hook at the same time. When a new object is created, //Just mark in_progress as false
$this->in_progress = TRUE;


if ($class !== FALSE){


if ( ! class_exists($class)){


require($filepath);
}
$HOOK = new $class;
$HOOK->$function($params); }else{
if ( ! function_exists($function)){

require($filepath);
}
$function($params);
}
$this->in_progress = FALSE;
The above introduces the instructions for using hooks under the CI framework and its functions, including relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.