php, infinite loop in while() loop

Question

/// infinite loop??
$x=1; 
while($x=9){ 
echo $x;
$x++;
}

i dont understand the reason behind, why the above code causes infinite loop in my opinio

Answer 1

You mean

$x == 9

But in your example it won't do anything, because $x != 9. You probably mean

while($x < 9)