jQuery to PHP - serialized strings

I'm currently AJAX'ing a login form.

var data = $(this).serialize();

This is the data I'm sending, I get this with PHP using Codeigniter like so:

$ajax = $this->input->post('data');

This returns username=john&password=doe as you'd expect.

How do I turn that into an array? I've tried doing unserialize() and I get null.


I believe you can use PHP's parse_str() function: http://php.net/manual/en/function.parse-str.php

$str = "first=value&arr[]=foo+bar&arr[]=baz";
echo $first;  // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz

parse_str($str, $output);
echo $output['first'];  // value
echo $output['arr'][0]; // foo bar
echo $output['arr'][1]; // baz


Using your code it would be:

parse_str($this->input->post('data'), $ajax);
echo $ajax['username'] . "/" . $ajax['password'];

Short answer is with parse_str;

parse_str($ajax, $array);
$array === array('username'=>'john', 'password'=>'doe');

However, the way you send your ajax data is a bit odd. Why are you serializing to a formencoded string and sending that string as a value to the 'data' parameter? Why don't you just send it directly? Then you could use $this->input->post('username') === 'john' without the extra level of deserializing.

For example, do this:

$.post(url, $(form).serialize());

instead of this (which you seem to be doing:

$.post(url, {data:$(form).serialize()});

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