11) { echo "$x"; } else { echo "not greater than $x"; } ?>

Question

 <?php

 $x=11;
if ($x++>11)
{
    echo "$x";
}
else
{
    echo "not greater than $x";
}
?>

Output of this code is - not greater than 12

I want to know why this happens. Thanks!

Answer 1

Due to Precedence and Increment. The value is compared before it is incremented. Therefore, that condition is false. If you do ++$x instead of x$++, then you will have a different result due to the pre and post increment. If you put brackets around $x++ then it will be evaluated first and you will have it evaluated to true.

Answer 2

The issue here is that there are two different incrementing operators. See the documentation.

Basically:

• $x++ uses $x as-is, then increments.
• ++$x increments, then uses the variable.