add php array to json array

[Pain]

Hello. I was wondering how can I add a php array to a js array containing json values.

var availableTags = [
  "AppleScript",
  "Asp",
  "BASIC",
  "C",
  "C++",
  "Clojure",
  "COBOL",
  "ColdFusion",
  "Erlang",
  "Fortran",
  "Groovy",
  "Haskell",
  "Java",
  "JavaScript",
  "Lisp",
  "Perl",
  "PHP",
  "Python",
  "Ruby",
  "Scala",
  "Scheme"
];

I want to add this to the js array:

<?php $arr = array('red', 'green', 'blue'); ?>

I've tried doing this, but its definitely the wrong approach as it just sums everything up into one element "redgreenblue"

 
var availableTags = [
  "<?php foreach($arr as $row) { echo $row; } ?>",
  "AppleScript",
  "Asp",
  "BASIC",
....

Thanks for any kind of help!

Edited August 19, 2014 by Pain

[CroNiX]

Where is the js array stored? Somehow you'd have to get that into php-land, or vice-versa. Then just json_decode(js_array) and array_merge() it with your php array, or the other way around (json_encode(php_array) and concatenate the 2 js arrays using jsarray.concat(other_array))

Edited August 19, 2014 by CroNiX

[Pain]

It's just this one variable - var availableTags = []. it is used in a script later on.

[CroNiX]

Yes, but that's a javascript array. Is it being generated by php or something before you stick it on the page?

[Pain]

Not really, it is pre-populated with values

[CroNiX]

I'm not sure how you would do that then. One is in the browser (js) and the other is on the server (php). Somehow they need to be in the same place in order to merge them.

[Pain]

Thanks for your effort. I have solved it by doing this:

 

 

 
<?php $php_cities_array = array('smth', 'smth2'); 
 
function js_str($s)
{
    return '"' . addcslashes($s, "\0..\37\"\\") . '"';
}
 
function js_array($array)
{
    $temp = array_map('js_str', $array);
    return '[' . implode(',', $temp) . ']';
}
 
$array = 'var availableTags = ' . js_array($php_cities_array) . ';';
 
?>
<script>
 
<?php echo $array; ?>
 
</script>

[CroNiX]

Something like this might work for you.

var availableTags = [
  "AppleScript",
  "Asp",
  "BASIC",
  "C",
  "C++",
  "Clojure",
  "COBOL",
  "ColdFusion",
  "Erlang",
  "Fortran",
  "Groovy",
  "Haskell",
  "Java",
  "JavaScript",
  "Lisp",
  "Perl",
  "PHP",
  "Python",
  "Ruby",
  "Scala",
  "Scheme"
];

<?php
$arr = array('red', 'green', 'blue');
echo "var php_array = " . json_encode($arr) . ';';
?>

availableTags = availableTags.concat(php_array);