array_change_key_case() Validates Its Case Argument¶
array_change_key_case() accepts a second argument, either CASE_LOWER or CASE_UPPER. Until PHP 8.6, any other value was silently treated as CASE_LOWER. In PHP 8.6, an invalid value throws a ValueError.
PHP code¶
<?php
var_dump(array_change_key_case(['A' => 1], 99));
?>
Before¶
array(1) {
[A]=>
int(1)
}
After¶
array_change_key_case(): Argument #2 ($case) must be either CASE_LOWER or CASE_UPPER
PHP version change¶
This behavior changed in 8.6
