Parsing data from jQuery in PHP [closed]

Question

I'm getting closer. I have a form that want to submit to a PHP file for processing and updating a MySQL db and then update a div. I can send the data to my PHP file and see it but not sure how to access it so it is useful.

from my JS

var str = $("form").serialize();
xmlhttp.open("GET","concessions_write.php?"+str,true);
xmlhttp.send();

sends this to my PHP file

concessions_write.php?btn%5B%5D=button01&itm%5B%5D=Hot+Dog&prc%5B%5D=1.00&id%5B%5D=1&btn%5B%5D=button02&itm%5B%5D=Popcorn&prc%5B%5D=1.00&id%5B%5D=3&btn%5B%5D=button03&itm%5B%5D=Combo&prc%5B%5D=3.50&id%5B%5D=2&btn%5B%5D=button04&itm%5B%5D=Nabs&prc%5B%5D=0.50&id%5B%5D=4&name=&message=

in my PHP file a

print_r($_GET);

gives

Array (
    [btn] => Array (
        [0] => button01
        [1] => button02
        [2] => button03
        [3] => button04 
    )
    [itm] => Array (
        [0] => Hot Dog
        [1] => Popcorn
        [2] => Combo
        [3] => Nabs
    )
    [prc] => Array (
        [0] => 1.00
        [1] => 1.00
        [2] => 3.50
        [3] => 0.50
    )
    [id] => Array (
        [0] => 1
        [1] => 3
        [2] => 2
        [3] => 4
    )
    [name] =>
    [message] =>
)

This is the info I need. Each entry has 4 parts - btn, itm, prc and id and I currently have 4 entries. Just not sure how to break it down to usable arrays so I can write the data back to the db.

Look at parse_str but can't seem to get it to work.

Ideas? Also any idea where name and message might be coming from? No form elements with this.

This question is vague. You have your request, and you know how to get your data from it, and now you want... what? — Yanick Rochon
– Yanick Rochon, Commented Dec 29, 2012 at 18:04
Why are you creating an XMLHttpRequest manually? The jQuery $.get() function would make this simpler. — Blender
– Blender, Commented Dec 29, 2012 at 18:05

ROY Finley · Accepted Answer · 2012-12-29 18:06:53Z

1

if you know the format of the data you can do this after you collect the $_GET as array():

$_GET['btn']['0'];

The name and meesage have to be coming form form input names.

answered Dec 29, 2012 at 18:06

ROY Finley

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2 Comments

Jason Templeman Over a year ago

Thanks. As the length is variable is there an easy way to get the length of the array?

smottt Over a year ago

Use count or sizeof. Basically the same. $length = sizeof($_GET['btn']);

halfer · Accepted Answer · 2012-12-29 19:14:52Z

0

Seems to me you just need a for loop:

for ($i = 0; $i < 3; $i++) {
    $btn = $_GET['btn'][$i];
    $itm = $_GET['itm'][$i];
    $prc = $_GET['prc'][$i];
    $id = $_GET['id'][$i];

    // Sanitise and save these values here
}

answered Dec 29, 2012 at 19:14

halfer

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