jQuery $.getJSON : Passing arrays to PHP

Question

I have javascript passing an array to PHP with:

         var mapIDArray = ["4f8d7684791635ec2e000000", "4f8cbc087916359181000000"];

         $.getJSON("rebound.php",
            { 
                'mapIDs[]' : mapIDArray
            },

            function(output){

                console.log(output);

            }
        );

In rebound.php, I try to read the passed array (var_dump, print_r, etc.), such as:

print_r($_GET['mapIDs[]']);

But no luck...

try print_r($_GET['mapIDs']);

Roman Pominov
– Roman Pominov

2012-04-17 20:57:36 +00:00
Commented Apr 17, 2012 at 20:57 — Roman Pominov
– Roman Pominov, Commented Apr 17, 2012 at 20:57

gen_Eric · Accepted Answer · 2012-04-17 20:57:44Z

5

You don't need add the [] to the name.

var mapIDArray = ["4f8d7684791635ec2e000000", "4f8cbc087916359181000000"];
$.getJSON("rebound.php",
{ 
   mapIDs: mapIDArray
},
function(output){
    console.log(output);
});

Then in your PHP: $_GET['mapIDs'] will be an array.

answered Apr 17, 2012 at 20:57

gen_Eric

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2 Comments

alyx Over a year ago

Didn't work – PHP is still not returning anything (PHP error log says "undefined index" for mapIDs.

gen_Eric Over a year ago

@jrbaldwinn: print_r($_GET) to see if anything is being sent at all.

freeone3000 · Accepted Answer · 2012-04-17 20:58:44Z

1

It'd be print_r($_GET['mapIDs']); on the server-side, and

var mapIDArray = ["4f8d7684791635ec2e000000", "4f8cbc087916359181000000"];
$.ajax("rebound.php",
            dataType: 'json',
            data:
            { 
                'mapIDs[]' : mapIDArray[0],
                'mapIds[]' : mapIdArray[1],
            },
            traditional: true,
            success: function(output){

                console.log(output);

            }
        );

on the client side. The key issues being that first, PHP sees it an an array with name 'mapIDs', even though it was mapIDs[] as a GET parameter, and second, multiple fields need multiple entries.

answered Apr 17, 2012 at 20:58

freeone3000

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4 Comments

gen_Eric Over a year ago

You can't have 2 elements in one object with the same name.

freeone3000 Over a year ago

You're (mostly) right. I could set traditional: false, as is the default, and mapIDs[]: mapIDArray.

gen_Eric Over a year ago

You shouldn't have the [] in the name with traditional: false.

gen_Eric Over a year ago

You forgot the {} around the object passed to $.ajax.

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