mb_convert_case

Function • Params and return types changed in PHP 8.0

Perform case folding on a string.

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

mb_convert_case Function synopsis

mb_convert_case(
    string $string,
    int $mode,
    ?string $encoding = null
  ): string

Parameters

$string

Typestring

The string being converted.

$mode

Typeint

The mode of the conversion. It can be one of MB_CASE_UPPER, MB_CASE_LOWER, MB_CASE_TITLE, MB_CASE_FOLD, MB_CASE_UPPER_SIMPLE, MB_CASE_LOWER_SIMPLE, MB_CASE_TITLE_SIMPLE, MB_CASE_FOLD_SIMPLE.

$mode accepts one of the following constant values:

$encoding

OptionalType?stringDefault valuenull

Return value

Typestring

A case folded version of $string converted in the way specified by $mode.

Changes to the mb_convert_case Function

PHP 8.0

  • Return type added: string
  • Parameter name of parameter #1 changed: $sourcestring to $string
  • Parameter type added for parameter #1 ($string): string
  • Parameter type added for parameter #2 ($mode): int
  • Parameter type added for parameter #3 ($encoding): ?string
  • Parameter default value added for position #3 ($encoding): null
  mb_convert_case(
-     $sourcestring,
+     string $string,
-     $mode,
+     int $mode,
-     $encoding
+     ?string $encoding = null
-   )
+   ): string

mb_convert_case 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