ctype_lower

Function • Params and return types changed in PHP 8.0

Check for lowercase character(s).

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

ctype_lower Function synopsis

ctype_lower(mixed $text): bool

Parameters

$text

Typemixed

The tested string.

Return value

Typebool

Returns true if every character in $text is a lowercase letter in the current locale. When called with an empty string the result will always be false.

Changes to the ctype_lower Function

PHP 8.0

  • Return type added: bool
  • Parameter type added for parameter #1 ($text): mixed
- ctype_lower($text)
+ ctype_lower(mixed $text): bool

ctype_lower Function Availability

PHP VersionAvailability
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