Why does PHP ignore ajax POST?

Question

The code: (index.php):

<head>

<?php
if(isset($_GET['text1']))
{
some_function();
}
?>
</head>

<body>
<form id="form">
<input type="text" id="text1" name="text1"/>
<input type="text" id="text2" name="text2"/>
<input type="submit" id="submit" value="submit"/>
</form>

<script>
$(document).ready(function(){

    $("#submit").click(function(){
            var dataString=$("form#form").serialize();
            var proccessPage="<?php echo $_SERVER['PHP_SELF'] ?>";

            alert(dataString);
            $.ajax({
                type: "POST", 
                url: proccessPage,
                data: dataString,
                });
    return false;
    });


});
</script>
</body>

Anyone know why some_function(); call is not triggered? I don't know if the problem is in ajax, or php, or where. I have spent two days in trying to use $.post, or $.ajax, searching for possible errors in code etc, but I cant find anything wrong with it.

Do you know something about it? Thanks for all answers.

score 6 · Accepted Answer · edited May 23 '17 at 12:12

6

Because you're looking for GET not POST. Change your PHP to the following:

<?php
if(isset($_POST['text1']))
{
some_function();
}
?>

GET and POST are different types of HTTP requests and you need to make sure your PHP code is looking for the right one. There's a fairly comprehensive description of the difference between them on this question: What is the difference between POST and GET?

edited May 23 '17 at 12:12

Community

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answered Oct 30 '12 at 12:27

n00dle

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Or $_REQUEST to catch both POST and GET type requests (and cookies, sadly). – Tino Didriksen Oct 30 '12 at 12:31
That's true. I always feel a little bit dirty using `$_REQUEST` though, unless there's no way I can know if I should be receiving `GET` or `POST`. In 99% of cases though, you know which you'll be getting and it seems like accepting from both could open up insecurities... Just a thought though - may well just be my paranoia! – n00dle Oct 30 '12 at 12:35
It's still not working. I tried $_POST and $_GET before, but it seems like php just ignores it. Even when I manually try to open localhost/?text1=blabla in browser, it doesnt work. – 4713n Oct 30 '12 at 12:40
What function is "some_function()"? The code you've got should work for the type of manual get request you mention. It sounds like your "some_function" isn't working as you'd expect. – n00dle Oct 30 '12 at 12:49
Sorry, its working now. It was something with POST as you said. Thanks. – 4713n Oct 30 '12 at 12:52

score 1 · Answer 2 · edited Oct 31 '12 at 16:02

1

This wont work anyhow!

The reason is you are making an AJAX POSTBACK which is Asynchronus.

In order to get what you need, you have to try this way:

<form id="form" action="" method="post">

and remove the script part. It will work!

~Shakir Shabbir

edited Oct 31 '12 at 16:02

Clyde Lobo

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answered Oct 30 '12 at 13:21

SHAKIR SHABBIR

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To some extent I agree - it could do with refactoring so that the PHP block is before the block and includes an `exit` or `die` if the POST exists. That way you'll only get the result of the function sent back to jQuery... – n00dle Oct 30 '12 at 15:15

Why does PHP ignore ajax POST?

2 Answers2