Null With array_key_exists()¶
null is not accepted anymore as the first argument of the PHP native function array_key_exists(). Since PHP 8.5, null is not accepted anymore as a key in an array, so it is also not accepted with the function array_key_exists(), which checks if a key exists in an array.
PHP code¶
<?php
$array = [null => 1]; // silent error
var_dump(array_key_exists(null, $array));
?>
Before¶
bool(true)
After¶
PHP Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead
Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead
bool(true)
PHP version change¶
This behavior changed in 8.5
