How to pass PHP array values to another file using jQuery Ajax?

Question

Here is my code,

<?php
$answers = Array( [0] => 13 [1] => 5 [2] => 6 [3] => 11 );
?>

<script>
    function loadData1(val) {
        var dataToSend = {
            'name': val,
            'ans[]': <? php echo $answers; ?>
        };
        $.ajax({
            type: 'POST',
            data: dataToSend,
            url: '<?php echo JURI::ROOT();?>classfiles/sample.php',
            success: function (data) {
                $('#questions').html(data);
            }
        });
    }
</script>

I want the array values in sample.php file, but I don't get any output.

Any useful answers are really appreciated.

sample.php just contains <?php $answers = Array ( [0] => 13 [1] => 5 [2] => 6 [3] => 11 ); ?> ? — user1157393
– user1157393, Commented Jan 24, 2013 at 10:01

Salman Arshad · Accepted Answer · 2013-01-24 10:21:05Z

7

The line:

var dataToSend = {'name' : val, 'ans[]' : <?php echo $answers; ?> } ;

will print:

var dataToSend = {'name' : val, 'ans[]' : Array } ;

which creates a ~~javascript syntax~~ semantic error (ans = empty string will be posted). Change to:

var dataToSend = {'name' : val, 'ans[]' : <?php echo json_encode($answers); ?> } ;

which prints:

var dataToSend = {'name' : val, 'ans[]' : [13,5,6,11] } ;

edited Jan 24, 2013 at 10:21

answered Jan 24, 2013 at 10:01

Salman Arshad

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3 Comments

Viktor S. Over a year ago

suppose key like ans[] can make a problem. If I'm not missing something, PHP will parse that like Array([0] => Array([0] => 13...)), so simply ans should be enough

Salman Arshad Over a year ago

@FAngel jQuery will build the string ans[]=13&ans[]=5&... which PHP will parse correctly as $_POST["ans"]=array(13,5,...);

Viktor S. Over a year ago

@SalmanA Ha! Cool! Sorry, I thought it will build ans[][]=13&ans[][]=5&... because array is being passed. But appears that in both cases (when key is ans or ans[]) it builds a string like ans[]=13&ans[]=5&... Will remember this...

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