fseek

Function • Params and return types changed in PHP 8.0

Seeks on a file pointer.

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

fseek Function synopsis

fseek(
    $stream,
    int $offset,
    int $whence = SEEK_SET
  ): int

Parameters

$stream
$offset

Typeint

The offset.

$whence

OptionalTypeintDefault valueSEEK_SET

$whence values are:

Return value

Typeint

Upon success, returns 0; otherwise, returns -1.

fseek returns one of the following integer values:

  • 0
  • -1

Changes to the fseek Function

PHP 8.0

  • Return type added: int
  • Parameter name of parameter #1 changed: $fp to $stream
  • Parameter type added for parameter #2 ($offset): int
  • Parameter type added for parameter #3 ($whence): int
  • Parameter default value added for position #3 ($whence): SEEK_SET
  fseek(
-     $fp,
+     $stream,
-     $offset,
+     int $offset,
-     $whence
+     int $whence = SEEK_SET
-   )
+   ): int

fseek 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