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This is crazy. I ran across this in an app I was writing. The following code will echo “YES”:
<?php
$var = 0;
if ($var == 'cash') echo 'YES';
else echo 'WEIRD';
?>
WHY??? How is zero interpretted to be equal to ‘cash’ ???
When you compare a number and a string, the string is converted to number. When you convert string ‘cash’ to number, the result is zero. You can use strict comparison (===), so you compare not only the value, but the type as well, and no type casting will be involved