get specific variable from ajax response using javascript

Question

I am using ajax in javascript to get data into same page. but I need specific variables from my php page rather then whole response..

right now I am using,

document.getElementById("myDiv").innerHTML=xmlhttp.responseText;

that is fetching everything from that page.

Edited Code-PHP:

$currentscript = $clients->curr_group_content($_POST['group']);
$scriptscount = sizeof($currentscript);
                   for($i=0;$i<$scriptscount;$i++){
                        $script[] = $currentscript[$i]['subject'];
                        echo $script[$i];
                   }
echo "$scriptcount";

JAVASCRIPT:

if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
  document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}

Right now, I am getting all the data from $script and $scriptcount... I want both of these but in separate manner.

so what have you tried in order to get a specific variable? Do you have any code that you can show us that you think should do the job, but doesn't work as you expect it to? — Mike 'Pomax' Kamermans
– Mike 'Pomax' Kamermans, Commented Sep 19, 2013 at 19:42
So, how do you expect anyone to help without showing them the information? — Diodeus - James MacFarlane
– Diodeus - James MacFarlane, Commented Sep 19, 2013 at 19:43

bfavaretto · Accepted Answer · 2013-09-19 19:56:16Z

1

Make your PHP output JSON:

echo json_encode(array(
    'scriptcount'=> $scriptcount,
    'script'=> $script
));

(do not echo anything else from your PHP)

Then in JS:

var data = JSON.parse(xmlhttp.responseText);
document.getElementById("myDiv").innerHTML = data.scriptcount;

edited Sep 19, 2013 at 19:56

answered Sep 19, 2013 at 19:50

bfavaretto

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6 Comments

user2696691 Over a year ago

first script you wrote on JSON, Do I need to put it in php page??

bfavaretto Over a year ago

Yes, instead of echo "$scriptcount"; And remove the other echo inside the loop.

user2696691 Over a year ago

Would it be same for if I want to print array instead of variable?

bfavaretto Over a year ago

Try document.getElementById("myDiv").innerHTML = data.script. You'll get a comma-separated strings with the value from the array.

user2696691 Over a year ago

Yes.. I am getting that. but, I have to separate it to put all that data into dropdownbox.. is there any way?

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