!/usr/bin/perl

$a = "http://www.myurl.com/e.php?a";
$b = "http://www.myurl.com/e.php?a";

if ($a =~ /$b/) {
        print "FOUND\n";
} else {
        print "NOT FOUND\n";
}

$a = "http://www.myurl.com/e.php";
$b = "http://www.myurl.com/e.php";

if ($a =~ /$b/) {
        print "FOUND\n";
} else {
        print "NOT FOUND\n";
}

##</code><code>##

NOT FOUND
FOUND