Overview
KB
Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Development
Learn PHP
 
<stream_socket_shutdownstream_wrapper_register>
^Stream FunctionsLast updated: Mon, 26 Oct 2026

stream_supports_lock

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

stream_supports_lock — Tells whether the stream supports locking

Description

function stream_supports_lock(resource $stream): bool

Tells whether the stream supports locking through flock().

Parameters

stream

The stream to check.

Return Values

Returns true on success or false on failure.

See Also

  • flock() - Portable advisory file locking


<stream_socket_shutdownstream_wrapper_register>
^Stream FunctionsLast updated: Mon, 26 Oct 2026