How to pass object (or array) to PHP from jQuery?

Question

I have an array that I'm trying to pass to a php file which is passing, but it shows the array as a string. How do I convert the string to an array so I can go through it in php? Here's my code:

jQuery

$('#add-child').click(function()
{
    var _attributes = [];
    $('#attributes input').each(function()
    {
        _attributes.push($(this).val());
    });
    $.post('../assets/hub.php',{'task':'add-child','parent':$('#parent-id').val(),'value':$('#child-value').val(),'attributes':JSON.stringify(_attributes)},function(callback)
    {
        console.log(callback);
    });
});

PHP

case 'add-child':
    $department = $_POST['parent'];
    $category   = $_POST['value'];        
    $attributes = $_POST['attributes'];
    print($department.' : '.$category.' : '.$attributes);
break;

CURRENT OUTPUT

test1 : test2 : ["sdfg","34","vsdf"]

** EDIT **

I removed JSON.stringify() and added var_dump() and this is the output:

string(3) "114"
string(4) "asdf"
array(3) {
    [0]=>
    string(4) "asdf"
    [1]=>
    string(4) "ZVCX"
    [2]=>
    string(5) "asdfr"

}

Why don't you pass _attributes value as-is? WHY do you apply JSON.stringify for it? — zerkms
– zerkms, Commented Nov 18, 2012 at 21:41
I tried that and I get an error > Array to string conversion in ... — Mike
– Mike, Commented Nov 18, 2012 at 21:42
because you're concatenating variables assuming they are string at line print($department.' : '.$category.' : '.$attributes);. While $attributes is an array. — zerkms
– zerkms, Commented Nov 18, 2012 at 21:43
You converted the data to JSON. Now you have to parse it into a PHP array. — Felix Kling
– Felix Kling, Commented Nov 18, 2012 at 21:47
@Felix Kling: .. or remove conversion (since it pointless) )) — zerkms
– zerkms, Commented Nov 18, 2012 at 21:47

zerkms · Accepted Answer · 2012-11-18 21:44:21Z

1

You don't need JSON.stringify at all and you check that everything is passed successfully using

var_dump($department, $category, $attributes);

not the pring_r with concatenations

answered Nov 18, 2012 at 21:44

zerkms

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3 Comments

Mike Over a year ago

hey zerkms, I did what you said and put the var_dump() results up in my post.

zerkms Over a year ago

@Mike: and you get expected result. Everything works, doesn't it?

Mike Over a year ago

Well, I learned I'm an idiot .. really? I'm gonna concatenate a string and array and expected it to work? Rookie mistake. Also YES! It does output my result when I do the following print($attributes[0]); Thanks, and good job ;)

Atif · Accepted Answer · 2012-11-18 21:51:17Z

1

$attributes = json_decode($_POST['attributes']);

if you want to join the array back agian with a comma then

$attributes = implode(',' , json_decode($_POST['attributes']));

edited Nov 18, 2012 at 21:51

answered Nov 18, 2012 at 21:40

Atif

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4 Comments

Mike Over a year ago

Hey Atif, I tried what you suggested and I get > Array to string conversion in ...

Atif Over a year ago

@Mike hey Mike, Im sorry I didn't understand what you said can you explain it clearly

zerkms Over a year ago

@Atif Mohammed Ameenuddin: he says that he concatenates variables (strings and array) and wonders why array cannot be converted to a string :)))

Atif Over a year ago

@zerkms but the questions says "How do I convert the string to an array do I can go through it in php?"

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