Check whether data returned from php via ajax is empty

Question

I have tried (data = "") and various others but none seem to work.

$.ajax({
    url: "includes/peopleGoingList.php",
    type: "POST",
    dataType: "html",
    data: {"ID": eventID},
    success: function(data){
    console.log(data);

    if (data.length === 0) {
        $("#dialog-attendees").html("<p>No one is going.. :[</p>");
    } else {
        $("#dialog-attendees").html(data);
    }
});

I always return JSON with ['ok'] set to true if everything went well and check if (typeof data=='object' && data.ok) — Popnoodles
– Popnoodles, Commented Jan 1, 2014 at 21:49
I originally returned json but I want sure how to loop though all the json data so I decided to echo html data in the php file instead. Musa's answer worked so I will stick with it :) — Tom S
– Tom S, Commented Jan 1, 2014 at 21:57
Ok but FYI $json=array('ok'=>true, 'html'=>$thehtml); echo json_encode($json); die; and $("#dialog-attendees").html(data.html); — Popnoodles
– Popnoodles, Commented Jan 1, 2014 at 22:02

Musa · Accepted Answer · 2014-01-01 21:47:20Z

3

There are probably arbitrary white space in your output, try trimming it

if ($.trim(data) == '') {

answered Jan 1, 2014 at 21:47

Musa

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