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<SysvMessageQueueSysvSharedMemory>
^SemaphoreLast updated: Mon, 26 Oct 2026

The SysvSemaphore class

(PHP 8)

Introduction

A fully opaque class which replaces a sysvsem resource as of PHP 8.0.0.

Class synopsis

final class SysvSemaphore {
}

<SysvMessageQueueSysvSharedMemory>
^SemaphoreLast updated: Mon, 26 Oct 2026