How to make a wrapper to call functions in different classes? - php

Question

I'm trying to solve a problem in ajax which is coming out from the moment that my client asked me to not use any framework for web applications.
I have always used CodeIgniter and I never had any problem with ajax requests, especially when I had to call a method simply perform this call:
var postUrl = GlobalVariables.baseUrl + 'application/controllers/user.php/ajax_check_login';
//http://localhost/App_Name/application/controllers/user.php/ajax_check_login <-postUrl content
var postData =
{
'username': $('#username').val(),
'password': $('#password').val()
};
$.post(postUrl, postData, function(response)
{
// do stuff...
});
How you can see from the code above what I want to do is call a method within the controller user.php whose name is ajax_check_login.
What I have done so far to achieve the desired result is to make this code:
$allowed_functions = array('ajax_check_login');
$ru = $_SERVER['REQUEST_URI']
$func = preg_replace('/.*\//', '', $ru);
if (isset($func) && in_array($func, $allowed_functions)) {
$user = new User();
$user->$func();
}
if you want to see the complete structure of a class click here.
The problem is that this code should be placed inside each controller,
and you have to set all the methods offered, sometimes the function available reaching fifty, leads to discard this solution...
What I want to know is: how can I make a wrapper, a class that allows me to invoke a method of the controller from url and execute it?
Before all this work was done by CodeIgniter. So now I have to write my own class that allows me to access the controls easily and recall methods in different classes.
All classes that have to respond to ajax request reside in application/controllers / ... folder. In the controllers folder I have 20 controllers.

Answer 1

You can add ajax.php:
<?php
preg_match_all('/([^\/.]*)\.php\/([^\/]*)$/', $_SERVER['REQUEST_URI'], $matches);
$class = $matches[1][0];
$func = $matches[2][0];
$allowed_classes = array('user','account','foo');
if (isset($class) && isset($func) && in_array($class, $allowed_classes)) {
require_once "application/controllers/" . $class. ".php";
// here you could do some security checks about the requested function
// if not, then all the public functions will be possible to call
// for example if you don't want to allow any function to be called
// you can add a static function to each class:
// static function getAllowedFunctions() {return array('func1','func2');}
// and use it the same way you had checked it in the question
$obj = new $class();
$obj->$func();
// or if need to pass $_POST:
// call_user_func(array($obj, $func, $_POST));
}
and in javascript post to:
var postUrl = GlobalVariables.baseUrl + 'application/controllers/ajax.php/user.php/ajax_check_login';
If you have apache, then you might be able to do it even without adding ajax.php by adding this to .htaccess in the controller directory:
RewriteEngine On
RewriteBase /baseUrl.../application/controllers/
RewriteRule ^([^\.]*\.php)/[^/]*$ ajax.php?file=$1&func=$2
Of course you need your real baseUrl there. And change the 1st 3 lines in the php to:
$class = $_GET['class'];
$func = $_GET['func'];