<?php $a = 10; $b = 20; $c = $a + $b; echo $c; ?>
<?php if("0" == 0) echo "YES"; else echo "NO"; if("0" === 0) echo "YES"; else echo "NO";
<?php $a = 10; $b = 20; $c = $a + $b; echo $c; ?>
<?php if("0" == 0) echo "YES"; else echo "NO"; if("0" === 0) echo "YES"; else echo "NO";