CASE_UPPER
Constant
CASE_UPPER is one of the accepted parameters for array_change_key_case parameter #2.
CASE_UPPER — CASE_UPPER is used with
array_change_key_case and is used to convert array
keys to upper case. As of PHP 8.2.0, only ASCII characters will be
converted.
PHP 5
PHP 7
PHP 8.0-8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6
CASE_UPPER = 1;CASE_UPPER Constant Availability
CASE_UPPER Constant Availability| PHP Version | Availability |
|---|---|
| PHP 8.6Upcoming Release | Yes |
| PHP 8.5Supported (Latest) | Yes |
| PHP 8.4Supported | Yes |
| PHP 8.3Security-Fixes Only | Yes |
| PHP 8.2Security-Fixes Only | Yes |
| PHP 8.1Unsupported | Yes |
| PHP 8.0Unsupported | Yes |
| PHP 7.4Unsupported | Yes |
| PHP 7.3Unsupported | Yes |
| PHP 7.2Unsupported | Yes |
| PHP 7.1Unsupported | Yes |
| PHP 7.0Unsupported | Yes |
| PHP 5.6Unsupported | Yes |
| PHP 5.5Unsupported | Yes |
| PHP 5.4Unsupported | Yes |
| PHP 5.3Unsupported | Yes |