Description:
------------
if the string is starting by characters,
it will be true if compare with zero.


Reproduce code:
---------------
$a="a.1afdsfdsfsd";

if($a==0) {
	echo "YES";
}
shows YES

$a=".1afdsfdsfsd";

if($a==0) {
	echo "YES";
}
shows nothing

$a="1afdsfdsfsd";

if($a==0) {
	echo "YES";
}
shows nothing

Expected result:
----------------
$a="a.1afdsfdsfsd";

if($a==0) {
	echo "YES";
}
shows nothing

Actual result:
--------------
$a="a.1afdsfdsfsd";

if($a==0) {
	echo "YES";
}
shows YES