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Editorial Team
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Asked: 2026-05-16T11:52:30+00:00

I finally succeeded in using Ajax to get SOMETHING sent from one page to

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I finally succeeded in using Ajax to get SOMETHING sent from one page to another! What I’m trying to do is pass an array from a PHP file to a Javascript file, and the Javascript file is receiving this in this.responseText:

<html>
<head>

    <script type="text/javascript">
        var jsonArray = ["chickens","horses","cows","werewolves","zombies","vampires","phantoms","U.S. Congressmen","performance artists","pieces of fencepost","barnhouses","robots","cyborgs"]

    </script>
</head>
</html>

I tried running eval() and alerting the result, but no result appears. How do I successfully extract the array from this.responseText?

Edit Here is my function thus far:

/*
 * Function: selectVictim
 * Called from function laserOn()
 *
 * Selects a random victim from a list of victims
 *
 * @return String: victim
 */
function selectVictim()
{
var params = "url=queenofsheep.com/Sheep/victims.php";
var request = new ajaxRequest();

request.open("POST", "victims.php", true);
request.setRequestHeader("Content-Type",
                             "application/x-www-form-urlencoded");
request.setRequestHeader("Content-Length", params.length);
request.setRequestHeader("Connection", "close");

request.onreadystatechange = function ()
{
    if (this.readyState == 4)
    {
        if (this.status == 200)
        {
            if (this.responseText != null )
            {
                var vicArray = eval('('+this.responseText+')');
                var numVic = Math.floor(Math.random() * (vicArray - 1));
                alert(vicArray);
            }
            else alert("Ajax error: No data received");
        }
        else alert("Ajax Error: " + this.statusText);
    }
}

request.send(params);
}

Second Edit The file containing the array (in PHP) is as follows:

<html>
<head>
<?php

$victims = array(

    // Animals
    "chickens",
    "horses",
    "cows",

    // Supernatural
    "werewolves",
    "zombies",
    "vampires",
    "phantoms",

    // Human
    "U.S. Congressmen",
    "performance artists",

    // Inanimate, non-mechanical
    "pieces of fencepost",
    "barnhouses",

    // Mechanical
    "robots",
    "cyborgs"

);

?>

    <script type="text/javascript">
        var jsonArray = <?php echo json_encode($victims); ?>


    </script>
</head>
</html>
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1 Answer

  1. Editorial Team

    If your php page is returning all the text that you reported (with <html> etc…) then your output is not a JSON object, but an html page. Your response should contain only your serialized JSON object (and the proper http response headers)…

    Once you have ‘cleaned’ your output you can use JSON2 library to parse your object:
    http://www.json.org/js.html

    var myObject = JSON.parse(myJSONtext);
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