Inserting PHP array into Javascript array

Question

I have an array like this:

Array
(
[0] => Array
 (
 [id] => 9826
 [tag] => "php"
 )
[1] => Array
 (
 [id] => 9680 
 [tag] => "perl"
 )
)

I want to pass this to a javascript variable that looks like this:

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

I have gotten this far:

var availableTags = [
 <?php
 foreach($Tags as $tag){
 echo $tag['tag'];
 }
 ?>
 ];

the problem I have is adding the double quotes around each tag and inserting a comma after each apart from the last.

I'm not sure of how to best do that?

Answer 1

Save yourself some lines of code:

var availableTags = <?php
function get_tag($value) {
 return $value['tag'];
}
echo json_encode(array_map("get_tag", $Tags));
?>

• Skilldrick: +1, this is exactly what json_encode is for. But it's not quite right, you need to make an array in PHP which is just 'tag', and json_encode that.
• thetaiko: @Skilldrick - indeed you are correct. Code changed appropriately.
• BBonifield: Use a lambda instead of a named function. array_map(function($this){ /**/ }, $Tags); Other than that, +1
• thetaiko: @BBonifield - would have except that a lot of people not yet using >= PHP 5.3.

Answer 2

var availableTags = [
<?php
 $tag_strings = array();
 foreach($Tags as $tag){
 $tag_strings[] = '"'.$tag['tag'].'"';
 }
 echo implode(",", $tag_strings);
 ?>
];

Answer 3

var availableTags = [
 <?php
 foreach($Tags as $tag){
 echo '"'.$tag['tag'].'",';
 }
 ?>
 ];

• Blair McMillan: The extra comma will break IE.
• Phill Pafford: hmm jQuery handles this, but after testing you guys are right. ugh, learning

Answer 4

Try:

var availableTags = <?php
echo json_encode(array_map(create_function('$v','return $v[\'tag\'];'), $Tags));
?>;

Answer 5

<?php 
$arr = array(
0 => array("id" => 9826, "tag" => "php"),
1 => array("id" => 9680, "tag" => "perl")
);
$my_array;
foreach($arr as $key=>$val) {
 $my_array[] = $arr[$key]['tag'];
}
$availableTags = json_encode($my_array);
echo $availableTags;
?>