fwrite

Function • Params and return types changed in PHP 8.0

Binary-safe file write.

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

fwrite Function synopsis

fwrite(
    $stream,
    string $data,
    ?int $length = null
  ): int|false

Parameters

$stream
$data

Typestring

The string that is to be written.

$length

OptionalType?intDefault valuenull

If $length is an int, writing will stop after $length bytes have been written or the end of $data is reached, whichever comes first.

Return value

Typeint|false

Changes to the fwrite Function

PHP 8.0

  • Return type added: int|false
  • Parameter name of parameter #1 changed: $fp to $stream
  • Parameter name of parameter #2 changed: $str to $data
  • Parameter type added for parameter #2 ($data): string
  • Parameter type added for parameter #3 ($length): ?int
  • Parameter default value added for position #3 ($length): null
  fwrite(
-     $fp,
+     $stream,
-     $str,
+     string $data,
-     $length
+     ?int $length = null
-   )
+   ): int|false

fwrite 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