MYSQL's Timestampdiff not working with PHP's if/else bigger than >

Question

The following Mysql SELECT-part of Timestampdiff

$result_all = mysql_query("SELECT *, TIMESTAMPDIFF(MINUTE,aktualisiert,NOW()) AS quote_diff FROM sms WHERE gesendet ='1' AND DATE_FORMAT( aktualisiert,  '%Y' ) = '2015' AND trash ='0' ORDER BY aktualisiert DESC");

seems not to work with the if else PHP Code

<?php
$qd = $row['quote_diff'];
$qdint = intval($qd);
$zahl = intval(100);

echo $qdint;

if ( $qdint > $zahl) {echo " minutes"; }
else { echo " minute"; }

var_dump($qdint); //int(91)
var_dump($zahl); //int(100)
?>

Also var_dump says, there are both integer.

But why is there no reaction of is bigger than > (or is smaller than < or is equal to ==)?

Answer 1

Found a working solution, without Timestampdiff:

$result_all = mysql_query("SELECT * FROM sms WHERE gesendet ='1' AND DATE_FORMAT( aktualisiert,  '%Y' ) = '2015' AND trash ='0' ORDER BY aktualisiert DESC");

(because a known problem dev.mysql.com...12.7...user comment from April 9 2004

<?php  $now = time();
       $lastLogin = strtotime($row['aktualisiert']);
       $diff = $now - $lastLogin;
       $now = date('YmdHis',$now);

       $diffecho = idate('i',$diff);

       if($diff > 59 && $diff < 119) { // 3600 seconds is 1 hour
       echo $diffecho." minute ago"; }
       else { echo $diffecho." minutes ago"; }
?>

Use the PHP function i date, if you don't want a leading zero.

There is also another cool way on developphp.com: Convert MySQL Timestamp to Ago Time Format OOP Tutorial

Maybe I use this later.

Thanks