You can use json_encode() to make array as an json object like,

var words = <?php echo json_encode($wordsArray) ?>;// don't use quotes
$.each(words, function(key, value) {
    console.log('stuff : ' + key + ", " + value);
});

It seems that your form submits a json object to the server so use json_decode with second parameter set to true to convert it to an array.

$php_array=  json_decode($_POST["questionandanswers"],true)

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)

I have fixed the problem. First I converted the object array to a normal array in PHP:

$customers = $app['database']->selectAll('customers');

$allCustomers = array();

foreach($customers as $key => $val) 
{
    $allCustomers[] = $val;
}

Then in the javascript part, I used json encode on this variable, and used a for loop to add each 'name' property to a javascript array, and finally passed it to the autocomplete function likewise:

var js_data = <?php echo json_encode($allCustomers) ?>;

var customername = [];

for (var i = 0; i < js_data.length; i++) 
{
    customername[i] = js_data[i]["name"];
}

autocomplete(document.getElementById("customers"), customername);

Thanks a lot everyone for offering your help.

Is this what you are trying to achieve?

$incoming is the jsonString coming from the javascript code

$incoming = '{
    "name":"A Name",
    "_typography": {
      "color": {
        "hex":"#2196f3"
      },
      "text-transform":"uppercase",
      "font-weight":"600"
      }
    }';

$a = json_decode($incoming, true);
echo var_export($a);

RESULT

array (
  'name' => 'A Name',
  '_typography' => 
  array (
    'color' => 
    array (
      'hex' => '#2196f3',
    ),
    'text-transform' => 'uppercase',
    'font-weight' => '600',
  ),
)

You can convert the PHP object to an array, and then use JSON function to encode it. After that, decode it from JavaScript. Here are some basic steps:

1. Convert the PHP object to an array.

2. Using json_encode() to encode that PHP array.

3. Pass JSON-encoded data to PHP

4. Decode JSON from JavaScript using JSON.parse or you can use jQuery.parseJSON to do that.

This is an interesting tutorial about passing a JavaScript object to a PHP object. You might find it useful by watching some other featured/related videos.

Hope this helps.

To convert you PHP array to JS , you can do it like this :

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

or using JSON_ENCODE :

var js_array =<?php echo json_encode($disabledDaysRange );?>;

Example without JSON_ENCODE:

<script type='text/javascript'>
    <?php
    $php_array = array('abc','def','ghi');
    ?>
    var js_array = [<?php echo '"'.implode('","', $php_array).'"' ?>];
    alert(js_array[0]);
</script>

Example with JSON_ENCODE :

<script type='text/javascript'>
    <?php
    $php_array = array('abc','def','ghi');
    ?>
    var js_array =<?php echo json_encode($disabledDaysRange );?>;
    alert(js_array[0]);
</script>

It sounds like you're retrieving a JSON string in JavaScript (perhaps via AJAX?). If you need to make this into an actual array value, you'd probably want to use JSON.parse().

var retrievedJSON = '["float","float","float","float"]'; // normally from AJAX
var myArray = JSON.parse(retrievedJSON);

If you're actually writing out a value into the page, rather than using AJAX, then you should be able to simply echo the output of json_encode directly, without quoting; JSON itself is valid JavaScript.

var myArray = <?php echo json_encode($myPhpArray); ?>;