CodeIgniter _remap function?

CodeIgniter permits you to override its default routing behavior through the use of the _remap() function. As you already knew the second segment of the URI typically determines with function is in the controller get called and it will be passed as a parameter to the _remap() function. So to hide the real method name in the URL you can use _remap() and you can define your own set of routing rules.

If your controller contains a function named _remap(), it will always get called regardless of what your URI contains. It overrides the normal behavior. For example: your URL is http://localhost/index.php/post/index and you do not want to call index for this then you can use _remap() to map new function view instead of index like this.

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public function _remap($method) {     if ($method == 'index')     {         $this->postList();     }     else     {         show_404();     } } public function postList() {    }

Any extra segments after the method name are passed into _remap() as an optional second parameter. This array can be used in combination with PHP’s call_user_func_array() to reproduce the CodeIgniter’s default behavior.

we can process your mappings neatly by avoiding multiple if – elseif – else and switch statements ,by defining your methods with prefix(Ex: process) and calling methods dynamically with call_user_func_array() as shown below.

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public function _remap($method, $params = array())   {       $method = 'process'.ucwords($method);       if (method_exists($this, $method))       {           return call_user_func_array(array($this, $method), $params);       }       show_404();   }

Resources:

• call_user_func_array(): Call a callback with an array of parameters
• method_exists(): Checks if the class method exists
• ucwords(): Uppercase the first character of each word in a string
• _remap(): override the default behavior of CI’s routing

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