Convert php array to Javascript

I'm going to assume that the two arrays you've given for PHP and JS are not related, and they're just examples of how arrays look in the two languages. Clearly you're not going to be able to convert those sequences of letters and numbers into those city names.

PHP provides a function to convert PHP arrays into Javascript code: json_encode(). (technically, it's JSON format; JSON stands for JavaScript Object Notation)

Use it like this:

<script type='text/javascript'>
<?php
$php_array = array('abc','def','ghi');
$js_array = json_encode($php_array);
echo "var javascript_array = ". $js_array . ";\n";
?>
</script>

See also the manual page I linked above for more information.

Note that json_encode() is only available in PHP 5.2 and up, so if you're using an older version, you'll need to use an existing one -- the PHP manual page also includes comments with functions written by people who needed it. (but that said, if you're using anything older than PHP 5.2 you should upgrade ASAP; PHP is currently at v5.3, and even 5.2 is no longer supported)

Dumb and simple :

var js_array = [<?php echo '"'.implode('","', $php_array).'"' ?>];

you can convert php arrays into javascript using php's json_encode()* function

<?php $phpArray = array(
          0 => 001-1234567, 
          1 => 1234567, 
          2 => 12345678, 
          3 => 12345678,
          4 => 12345678,
          5 => 'AP1W3242',
          6 => 'AP7X1234',
          7 => 'AS1234',
          8 => 'MH9Z2324', 
          9 => 'MX1234', 
          10 => 'TN1A3242',
          11 => 'ZZ1234'
    )
?>

<script type="text/javascript">

    var jArray= <?php echo json_encode($phpArray ); ?>;

    for(var i=0;i<12;i++){
        alert(jArray[i]);
    }

 </script>

You do not have to call parseJSON since the output of json_decode is a javascript literal. Just assign it to a js variable.

<script type="text/javascript">
    //Assign php generated json to JavaScript variable
    var tempArray = <?php echo json_encode($php_array); ?>;

   //You will be able to access the properties as 
    alert(tempArray[0].Key);
</script>

This is my function. JavaScript must be under PHP otherwise use SESSION.

<?php
 $phpArray=array(1,2,3,4,5,6);
?>

<div id="arrayCon" style="width:300px;"></div>

<script type="text/javascript">
var jsArray = new Array();
<?php
 $numArray=count($phpArray);
 for($i=0;$i<$numArray;$i++){
  echo "jsArray[$i] = ". $phpArray[$i] . ";\n";
 }
?>
$("#arrayCon").text(jsArray[1]);
</script>

Last row can be ....text(jsArray); and will be shown "1,2,3,4,5,6"

I find the quickest and easiest way to work with a PHP array in Javascript is to do this:

PHP:

$php_arr = array('a','b','c','d');

Javascript:

//this gives me a JSON object
js_arr = '<?php echo JSON_encode($php_arr);?>';


//Depending on what I use it for I sometimes parse the json so I can work with a straight forward array:
js_arr = JSON.parse('<?php echo JSON_encode($php_arr);?>');

For a multidimensional array in PHP4 you can use the following addition to the code posted by Udo G:

function js_str($s) {
   return '"'.addcslashes($s, "\0..\37\"\\").'"';
}

function js_array($array, $keys_array) {
  foreach ($array as $key => $value) {
    $new_keys_array = $keys_array;
    $new_keys_array[] = $key;
    if(is_array($value)) {          
      echo 'javascript_array';
      foreach($new_keys_array as $key) {
        echo '["'.$key.'"]';
      }
      echo ' = new Array();';

      js_array($value, $new_keys_array);
    } else {
      echo 'javascript_array';
      foreach($new_keys_array as $key) {
        echo '["'.$key.'"]';
      }
      echo ' = '.js_str($value).";";                        
    }
  } 
}

echo 'var javascript_array = new Array();';
js_array($php_array, array());

I had the same problem and this is how i done it.

/*PHP FILE*/

<?php

$data = file_get_contents('http://yourrssdomain.com/rss');
$data = simplexml_load_string($data);

$articles = array();

foreach($data->channel->item as $item){

    $articles[] = array(

        'title' => (string)$item->title,
        'description' => (string)$item ->description,
        'link' => (string)$item ->link, 
        'guid' => (string)$item ->guid,
        'pubdate' => (string)$item ->pubDate,
        'category' => (string)$item ->category,

    );  
}

// IF YOU PRINT_R THE ARTICLES ARRAY YOU WILL GET THE SAME KIND OF ARRAY THAT YOU ARE GETTING SO I CREATE AN OUTPUT STING AND WITH A FOR LOOP I ADD SOME CHARACTERS TO SPLIT LATER WITH JAVASCRIPT

$output="";

for($i = 0; $i < sizeof($articles); $i++){

    //# Items
    //| Attributes 

    if($i != 0) $output.="#"; /// IF NOT THE FIRST

// IF NOT THE FIRST ITEM ADD '#' TO SEPARATE EACH ITEM AND THEN '|' TO SEPARATE EACH ATTRIBUTE OF THE ITEM 

    $output.=$articles[$i]['title']."|";
    $output.=$articles[$i]['description']."|";
    $output.=$articles[$i]['link']."|";
    $output.=$articles[$i]['guid']."|";
    $output.=$articles[$i]['pubdate']."|";
    $output.=$articles[$i]['category'];
}

echo $output;

?>
/* php file */


/*AJAX COMUNICATION*/

$(document).ready(function(e) {

/*AJAX COMUNICATION*/

var prodlist= [];
var attrlist= [];

  $.ajax({  
      type: "get",  
      url: "php/fromupnorthrss.php",  
      data: {feeding: "feedstest"},
      }).done(function(data) {

        prodlist= data.split('#');

        for(var i = 0; i < prodlist.length; i++){

            attrlist= prodlist[i].split('|');

            alert(attrlist[0]); /// NOW I CAN REACH EACH ELEMENT HOW I WANT TO. 
        }
   });
});

I hope it helps.

It can be done in a safer way, with only 1 line of code.

If your PHP array contains special characters, you need to use rawurlencode() in PHP and then use decodeURIComponent() in JS to escape those. And parse the JSON to native js. Try this:

var data = JSON.parse(decodeURIComponent("<?=rawurlencode(json_encode($data));?>"));
console.log(data);