is_writable

Function • Params and return types changed in PHP 8.0

Tells whether the filename is writable.

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

is_writable Function synopsis

is_writable(string $filename): bool

Parameters

$filename

Typestring

The filename being checked.

Return value

Typebool

Returns true if the $filename exists and is writable.

Changes to the is_writable Function

PHP 8.0

  • Return type added: bool
  • Parameter type added for parameter #1 ($filename): string
- is_writable($filename)
+ is_writable(string $filename): bool

is_writable Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Supported Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Security-Fixes Only 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