Comparing responseText to string

[ShaolinF]

Hi Guys,

 

I've been trying to do this in several different occasions but it doesn't work. See the code below:

 

php script:

if ($_GET['tn'] > $result['TicketsOnSale']) {
    echo "inline";
} else {
    echo "none";
}

 

AJAX:

if(ihr.responseText == 'inline')

 

If the script echos inline, then the AJAX IF statement should be true. But even if logically it is true it still doesn't work. I've tried single and double quotes for both the php and AJAX script to no avail. The whole script works fine up until the IF statement. I've tried to debug using firebug but it outputs no errors. Why does this happen ?

[phpQuestioner]

Did you try something like this:

 

<script language="javascript">

// Your AJAX Would Be Here

function check4It() {
var what = ihr.responseText;
if (what == "inline") {
// do something
}
setTimeout("check4It()", 1000);
}
window.onload = function() {
check4It();
}
</script>

 

I will not guarantee this will work; but it might be worth a shot.

[ShaolinF]

Yes, I have tried the code upto setTimeout().

[priti]

Hi,

 

do alert and find what you are getting in responseText then trim off the extra spaces before comparing and check weather it works.

 

 

 

Regards,

[ShaolinF]

Hi,

 

Alert gives me the exact answer that is being compared in the IF statement. Trimming doesnt work either.

[priti]

Kindly check once in error console in FF .Any error is coming there or not??? check the variables names . if you can post the code we can help you more.

[laffin]

yer php script sez

if ($_GET['tn'] > $result['TicketsOnSale']) {

 

yet in a string comparison it will be either == or !=

not > and <

if ya want to use < or >  use strcmp function

 

otherwise make shure 'tn' is a number as define it as so.

 

 

 

[ShaolinF]

how would i use strcmp and where?

[ShaolinF]

yer php script sez

if ($_GET['tn'] > $result['TicketsOnSale']) {

 

yet in a string comparison it will be either == or !=

not > and <

if ya want to use < or >  use strcmp function

 

otherwise make shure 'tn' is a number as define it as so.

 

 

 

 

But that shouldn't be a problem because I am echo-ing a string.

 

Check out my code below and tell me if you see any problems:

 

var tickno = document.signup.ticketno.value;
var queryString = "?tn=" + tickno;
xhr.open("GET","tickno.php" + queryString,true);

xhr.onreadystatechange=function() {   
if(xhr.readyState==4) {
	var what = xhr.responseText;
		if (what == "none") {
		alert("yes");
		}
}	
}
xhr.send(null);  
}

 

PHP:

<?php	
include('db_connect.php');
$result = mysql_query('SELECT TicketsOnSale FROM event WHERE eventset = 1 LIMIT 1') or die(mysql_error());
$result = mysql_fetch_array($result);

if ($_GET['tn'] > $result['TicketsOnSale']) {
    echo "setdisplay";
} else {
    echo "setnone";
}
?>

[ShaolinF]

Damn, can't edit script. in the AJAX, change the following line:

 

if (what == "none") {

 

--to--

 

if (what == "setnone") {

[back2school4good]

ShaolinF, I'm having the exact same problem with a site that I'm currently building. But on a previous site I built that was running PHP on a Windows IIS 7 server, this code works! So maybe it's a server-related issue? Does anyone else have an idea as to how we can solve this problem on a Linux server?

[back2school4good]

ShaolinF, I hardly ever post anything in a forum, but wouldn't you know that two seconds after I post something (like my last reply), I FIGURED OUT THE PROBLEM!!!...

 

By reading this post, I learned how to use the trim() function and also the console.log(someObjectName) function. I have no idea why, but my responseText was being sent back with an extra space at the first. I HAVE NO IDEA WHY. I double-checked my PHP file that was sending the text back to my AJAX code, and it had no extra spaces... who knows!