No Max() On Empty Array¶
max() does not accept an empty array as argument. In that case, it used to return NULL, but NULL is also a valid return value, and it is not possible to differentiate between the NULL of an empty array and the NULL that is really a maximum value.
PHP code¶
<?php
max([]);
?>
Before¶
PHP Warning: max(): Array must contain at least one element in /codes/maxOnEmpty.php on line 3
Warning: max(): Array must contain at least one element in /codes/maxOnEmpty.php on line 3
After¶
PHP Fatal error: Uncaught ValueError: max(): Argument #1 ($value) must contain at least one element in /codes/maxOnEmpty.php:3
Stack trace:
#0 /codes/maxOnEmpty.php(3): max(Array)
#1 {main}
thrown in /codes/maxOnEmpty.php on line 3
Fatal error: Uncaught ValueError: max(): Argument #1 ($value) must contain at least one element in /codes/maxOnEmpty.php:3
Stack trace:
#0 /codes/maxOnEmpty.php(3): max(Array)
#1 {main}
thrown in /codes/maxOnEmpty.php on line 3
PHP version change¶
This behavior changed in 8.0
