jQuery ajax not passing data JSON value

Question

I am having some issues with the jQuery Ajax function and PHP.

I am checking the existance of the nav key in the $_REQUEST variable in PHP with code such as this:

if ($_REQUEST['nav']) {
    // do something
} else {
    echo 'Please specify NAV.';
}

However the above expression never evaluates as nav is never passed to it and always outputs 'Please specify NAV.'

console.log('paramList: ' + paramList);

$.ajax({
    type: 'POST',
    url: '/admin/nav_builder/edit.php?act=save&nav_id=<?php echo $nav_id; ?>',
    data: {'nav':paramList},
    dataType: 'json',
    error: function(xhr, err) {                             
        loadLayout();
        hideLoader();
        hideLoaderPalette();
    },
    success: function(data){
        $('.errorMsg').html(data.html);
        hideLoader();
        hideLoaderPalette();
    }
});

Using the Firefox Firebug plugin I can see that paramList does indeed hold a value, this is:

paramList: {"section0":{"elem0":{"nav_palette":"text","nav_name":"fdgfdgdfg","nav_url":""},"elem1":{"nav_palette":"category","c_id":"226"}}}

I can't see for the life of my why nav is not being passed to the URL provided to the ajax function.

Have you tried dumping the $_REQUEST on the PHP side to see what's actually being populated? — Evan Davis
– Evan Davis, Commented May 29, 2012 at 14:49
Does it work with $_POST['nav'] instead of $_REQUEST['nav']? — Alessandro Pezzato
– Alessandro Pezzato, Commented May 29, 2012 at 14:51
@AlessandroPezzato No, it doesn't work with $_POST, $_GET or $_REQUEST — crmpicco
– crmpicco, Commented May 29, 2012 at 15:05
Why are you specifying a POST? Does the server require a POST instead of a GET? — Jonathan M
– Jonathan M, Commented May 29, 2012 at 15:23

Jonathan M · Accepted Answer · 2012-05-29 15:20:52Z

1

Try to print first if the "nav" parameter if it has a value.

echo $_REQUEST['nav'];

The other one is that you have used two method in one request.

Just try the following.

$.ajax({
    type: 'POST',
    url: '/admin/nav_builder/edit.php',
    data: {act:'save', nav_id:'<?php echo $nav_id; ?>', nav:paramList},
    dataType: 'json',
    error: function(xhr, err) {                             
        loadLayout();
        hideLoader();
        hideLoaderPalette();
    },
    success: function(data){
        $('.errorMsg').html(data.html);
        hideLoader();
        hideLoaderPalette();
    }
});

edited May 29, 2012 at 15:20

Jonathan M

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answered May 29, 2012 at 15:03

John Rey Flores

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Comments

Jeff Watkins · Accepted Answer · 2012-05-29 14:50:44Z

0

Try $_POST instead. As you're posting the nav contents.

answered May 29, 2012 at 14:50

Jeff Watkins

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3 Comments

Ruben Nagoga Over a year ago

What is the difference? $_REQUEST - An associative array that by default contains the contents of $_GET, $_POST and $_COOKIE.

Jonathan M Over a year ago

$_REQUEST is the combination of $_POST and $_GET and $_COOKIE.

Jeff Watkins Over a year ago

I'd worry that the querystring built up above could contain something spurious which could poison the well (e.g. I'm not sure what'd happen if in the nav_id there was an ampersand then nav). If you're using $_POST, you KNOW it's a post value you're getting and not anything from a different/subverted source.

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