Increment On Boolean Is Deprecated

Incrementing or decrementing a boolean value had no effect. In PHP 8.3, it is now a deprecation warning, and a message.

PHP code

<?php

$a = true;
$a++;

$b = false;
--$b;
echo $a, $b;

?>

Before

1

After

PHP Warning:  Increment on type bool has no effect, this will change in the next major version of PHP in /codes/incrementOnBoolean.php on line 4

Warning: Increment on type bool has no effect, this will change in the next major version of PHP in /codes/incrementOnBoolean.php on line 4
PHP Warning:  Decrement on type bool has no effect, this will change in the next major version of PHP in /codes/incrementOnBoolean.php on line 7

Warning: Decrement on type bool has no effect, this will change in the next major version of PHP in /codes/incrementOnBoolean.php on line 7
1

PHP version change

This behavior was deprecated in 8.3

This behavior changed in 9.0

Error Messages

• Increment on type bool has no effect, this will change in the next major version of PHP