Accessing a PHP class function through AJAX

Question

Does anyone know how I can directly access a function from a PHP class through AJAX (using jQuery).

PHP:

class Blah
{
    function __construct()
    {
    }

    function doSomething(data)
    {
        echo "I am not an animal";
    }
}

jQuery:

$.ajax({
        url: myClass.php,
        data: Blah.doSomething(); "or" Blah->doSomething()  "or whatever"
    });

I know this is a crude example, i'm just trying to illustrate a point, I hope you can get the gist of my question.

At the moment i'm doing something along these lines:

$.ajax({
        url: myClass.php,
        data: data : { 'type':'doSomething' }
    });

||

if(POST['data']['type'] == 'doSomething')
{
     $this->doSomething();
}

And I don't like it...

Consider the security implications if your example were true.. Anyone could call arbitrary class functions from the browser! — calebds
– calebds, Commented Feb 9, 2012 at 18:10

Stelian Matei · Accepted Answer · 2012-02-09 18:18:24Z

5

You need to create an object of that class and then invoke the methods you need. The class declaration doesn't not execute any code.

For example, you can add this below the class:

class Blah { ... }
$b = new Blah();
$b->doSomething();

UPDATE:

If you want to invoke the method sent in POST, you can use the function call_user_function:

$method_name = $_POST['method'];
$b->{$method_name}();

See here more details: http://php.net/manual/en/function.call-user-func.php

edited Feb 9, 2012 at 18:18

answered Feb 9, 2012 at 18:12

Stelian Matei

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1 Comment

hakre Over a year ago

See Remote Procedure Call - en.wikipedia.org/wiki/Remote_procedure_call (RPC), for example JSON-RPC - en.wikipedia.org/wiki/JSON-RPC

rajesh · Accepted Answer · 2012-02-09 18:26:40Z

3

i don't know why do you like to do so. its not a good programming practice. but you can try something like this

$.ajax({
    url: myClass.php,
    data: {'call':'Blah.doSomething', 'args':5}
});

and in server side you can do like

$fun = explode('.', $call);
$function = array($fun[0], $fun[1]);
if (is_callable($function)) {
    $response = call_user_func_array($function, $args);
}
echo $response;

answered Feb 9, 2012 at 18:26

rajesh

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Comments

James Lin · Accepted Answer · 2012-02-09 18:11:15Z

1

Right now I can't think of any better way than PHP outputting results in json and you get the result via getJSON

answered Feb 9, 2012 at 18:11

James Lin

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Comments

Greg Kramida · Accepted Answer · 2012-02-09 18:18:15Z

1

I concur with mazzucci's answer. I hope this is a bit more complete.

PHP:

class SomeClass{ 
 //definintion 
}
$obj = new SomeClass();
$obj->doStuff();

HTML:

<input type="button" onclick="<?php $obj->doStuff(); ?>" id="btnAdd" value="Click Me" />

Also, you can look into xajax, a nice little framework that simplifies php<->javascript interaction. It can call js functions from php as well. Here's the link: http://www.xajax-project.org/en/home/

answered Feb 9, 2012 at 18:18

Greg Kramida

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Comments

Joel Candela · Accepted Answer · 2012-12-13 00:10:11Z

1

**Your class**
class Blah {
    function doSomething(data) {
        echo "I am not an animal, I'm a ".data;
    }
}

**Ajax call in other document**
$.ajax({
   url: example.php,
   data: info='beast'
   success: data () { ...
});

**in example.php**
include (class.blah.php);
$obj = new SomeClass();
$obj ->doStuff($_GET['info']);

answered Dec 13, 2012 at 0:10

Joel Candela

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1 Comment

Craig Over a year ago

You could improve this answer by adding comments explaining how your code works to answer the question...

Madara's Ghost · Accepted Answer · 2012-02-09 18:13:05Z

0

It's not possible. What you currently have is probably the best way.

answered Feb 9, 2012 at 18:13

Madara's Ghost

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