chr

Function • Params and return types changed in PHP 8.0

Generate a single-byte string from a number.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

`chr` Function synopsis

chr(int $codepoint): string

Parameters

`$codepoint`

Typeint

An integer between 0 and 255.

Return value

Typestring

A single-character string containing the specified byte.

Changes to the `chr` Function

PHP 8.0

Return type added: string
Parameter type added for parameter #1 ($codepoint): int

- chr($codepoint)
+ chr(int $codepoint): string

`chr` Function 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