Question

I am learning json now and have run into an issue:

I am using code like this to spit about and array of data:

<?php
 $requiredFieldsArray = array();
    $results = mysql_query("select account_id, display_name, id from field 
where account_id = $holdAcctID and required_flag = 1");
    while($result = mysql_fetch_assoc($results)) 
        {
        $requiredFieldsArray[] = $result;
    }
?>
<script language="javascript">
    var requiredFieldsPRS = <?php echo "new Array(". json_encode($requiredFieldsArray).")"; ?>;
</script>
}

It outputs this:

 var requiedFieldsPRS = new Array([{"account_id":"3","display_name":"Project Requested By","id":"15"},{"account_id":"3","display_name":"Project Title","id":"18"},{"account_id":"3","display_name":"Project Type","id":"19"},{"account_id":"3","display_name":"Banner Details","id":"20"},{"account_id":"3","display_name":"Email to Me","id":"2910"}]);;

In my code how can I remove the “[” and “]” from the beginning and end of the array, so it will appear like this?

var requiedFieldsPRS = new Array({"account_id":"3","display_name":"Project Requested By","id":"15"},{"account_id":"3","display_name":"Project Title","id":"18"},{"account_id":"3","display_name":"Project Type","id":"19"},{"account_id":"3","display_name":"Banner Details","id":"20"},{"account_id":"3","display_name":"Email to Me","id":"2910"});

Note: The opening and closing brackets are gone in the above output.

Answer 1

You can trim off leading and ending []s easily enough for this particular example:

var requiredFieldsPRS = <?php echo "new Array(". trim(json_encode($requiredFieldsArray), '[]').")"; ?>;

However if your Array constructor is not necessary you could just use:

var requiredFieldsPRS = <?php echo json_encode($requiredFieldsArray); ?>;