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, Feb 09 '12 at 18:10

Stelian Matei · Accepted Answer · 2012-02-09T18:18:24.803

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 09 '12 at 18:18

answered Feb 09 '12 at 18:12

Stelian Matei

11,553
2
25
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See *Remote Procedure Call* - http://en.wikipedia.org/wiki/Remote_procedure_call (RPC), for example **JSON-RPC** - http://en.wikipedia.org/wiki/JSON-RPC – hakre Feb 09 '12 at 18:22

score 3 · Answer 2 · answered Feb 09 '12 at 18:26

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;

score 1 · Answer 3 · answered Dec 13 '12 at 00:10

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 '12 at 00:10

Joel Candela

11
1

You could improve this answer by adding comments explaining how your code works to answer the question... – Craig Dec 13 '12 at 00:28

score 1 · Answer 4 · answered Feb 09 '12 at 18:11

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 09 '12 at 18:11

James Lin

25,028
36
133
233

score 1 · Answer 5 · answered Feb 09 '12 at 18:18

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/

score 0 · Answer 6 · answered Feb 09 '12 at 18:13

0

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

answered Feb 09 '12 at 18:13

Madara's Ghost

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Accessing a PHP class function through AJAX

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