flock

Function • Params and return types changed in PHP 8.0

Portable advisory file locking.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

flock(
    $stream,
    int $operation,
    &$would_block = null
  ): bool

Typeint

$operation is one of the following:

Passed by reference, OptionalDefault valuenull

The optional third argument is set to 1 if the lock would block (EWOULDBLOCK errno condition).

Note that the parameter $would_block is passed by reference, and contains additional/updated context data that may be useful.

Typebool

Returns true on success, false on failure

Changes to the `flock` Function

  flock(
-     $fp,
+     $stream,
-     $operation,
+     int $operation,
-     &$wouldblock
+     &$would_block = null
-   )
+   ): bool