accessing php variable from javascript code

Question

My file is with .php extension. I have a php variable $dataSelected that is an associative array. Actually it's the result set of a select query output. Here is what this variable has when printing with print_r:

Array
(
 [0] => Array
    (
        [attribute_group_id] => 3
        [language_id] => 1
        [name] => Memory
    )

 [1] => Array
    (
        [attribute_group_id] => 4
        [language_id] => 1
        [name] => Technical
    )

 [2] => Array
    (
        [attribute_group_id] => 5
        [language_id] => 1
        [name] => Motherboard
    )

 [3] => Array
    (
        [attribute_group_id] => 6
        [language_id] => 1
        [name] => Processor
    )

)

I want to access this variable from within my javascript code snippet(on the same page). My goal is to use the result of the query(which is stored in the $dataSelected variable) to dynamically add option element to a select tag.

I have tried the below code. But it is printing null in the console. Can anyone please help what I am doing wrong here?

<? php
    $dataSelected = $coreModel -> selectData('*','oc_attribute_group_description');
?>

<script>
 var attrGroups = <?php echo json_encode($dataSelected)?>;
 console.log(attrGroups);
</script>

Maybe you can put the php value to a hidden input, and you can import it easily in javascript. :D — Mihálovics Rómeó
– Mihálovics Rómeó, Commented Mar 20, 2017 at 9:37
Possible duplicate of How to pass variables and data from PHP to JavaScript? — wildeyes
– wildeyes, Commented Mar 20, 2017 at 9:39
first try a var_dump($dataSelected) in php. If all is alright, maybe try var attrGroups = '<?php echo json_encode($dataSelected);?>'; or just without the ' but with the extra ; — Edwin
– Edwin, Commented Mar 20, 2017 at 9:39
put single quotes around php opening and closing tags in javascript. Thanks. — user1544541
– user1544541, Commented Mar 20, 2017 at 9:46
@MihálovicsRómeó: that's a tricky alternative solution. Thanks. But I would first try to achieve what I explained in the question. — Yeasir Arafat Majumder
– Yeasir Arafat Majumder, Commented Mar 20, 2017 at 12:39

Community · Accepted Answer · 2017-05-23 12:32:11Z

1

As suggested in: previous comment

try:

var attrGroups = '<?php echo json_encode($dataSelected);?>';

edited May 23, 2017 at 12:32

CommunityBot

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answered Mar 20, 2017 at 12:58

Edwin

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Comments

Marco Salerno · Accepted Answer · 2017-03-20 09:42:19Z

1

Try in this way:

<? php
    $dataSelected = $coreModel -> selectData('*','oc_attribute_group_description');
?>

<script>
 var attrGroups = "<?php echo $dataSelected; ?>";
 console.log(attrGroups);
</script>

answered Mar 20, 2017 at 9:42

Marco Salerno

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