Description:
------------
This bug for unknown reason. Happens approximately 5 times for every 1000 times the script is run. The PHP script where this bug occurs is very complicated so we couldn't figure what encourages this bug to occur. This bug has been bothering us for months. Today we finally gaught it and realized $_REQUEST is the problem. If you run print_r($_REQUEST) key "startqid" is there with its value, but isset($_REQUEST['startqid']) returns false and also if you try to assign "startqid" to a local variable the value will be empty. We fixed this problem simply by replacing $_REQUEST with $_POST, so this is definately a bug in PHP as all $_POST values should exists always in $_REQUEST.

We are using Apache 1.3.33

'./configure' '--with-apxs=/var/apache1333/bin/apxs' '--with-mysql' '--prefix=/var/apache1333/php' '--with-config-file-path=/var/apache1333/php' '--with-imap=/usr/local/imap-2004a' '--with-gd' '--with-png-dir=/usr/include/lib' '--with-zlib-dir=/root/Apache1333/zlib-1.2.1' '--enable-gd-native-ttf' '--with-freetype-dir=/usr/include/freetype2' 

Reproduce code:
---------------
# THIS METHOD DOESN'T
if (isset($_REQUEST('startqid']))
{
    echo "Startqid is coming in ";
    $startqid=$_REQUEST['startqid'];
    echo "($startqid)";
}
else
{
    echo "Startqid not coming in";
}

# THIS METHOD WORKS
if (isset($_POST('startqid']))
{
    echo "Startqid is coming in ";
    $startqid=$_POST['startqid'];
    echo "($startqid)";
}
else
{
    echo "Startqid not coming in";
}

Expected result:
----------------
Startqid is coming in (1)
Startqid is coming in (1)

Actual result:
--------------
Startqid not coming in 
Startqid is coming in (1)