PHP: Hypertext Preprocessor (original) (raw)

shmop_size

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

shmop_size — Get size of shared memory block

Description

Parameters

shmop

The shared memory block identifier created by shmop_open()

Return Values

Returns an int, which represents the number of bytes the shared memory block occupies.

Changelog

Examples

Example #1 Getting the size of the shared memory block

<?php <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>h</mi><msub><mi>m</mi><mi>s</mi></msub><mi>i</mi><mi>z</mi><mi>e</mi><mo>=</mo><mi>s</mi><mi>h</mi><mi>m</mi><mi>o</mi><msub><mi>p</mi><mi>s</mi></msub><mi>i</mi><mi>z</mi><mi>e</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">shm_size = shmop_size(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8444em;vertical-align:-0.15em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">h</span><span class="mord"><span class="mord mathnormal">m</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.1514em;"><span style="top:-2.55em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">s</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mord mathnormal">i</span><span class="mord mathnormal">ze</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">hm</span><span class="mord mathnormal">o</span><span class="mord"><span class="mord mathnormal">p</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.1514em;"><span style="top:-2.55em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">s</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mord mathnormal">i</span><span class="mord mathnormal">ze</span><span class="mopen">(</span></span></span></span>shm_id); ?>

This example will put the size of shared memory block identified by$shm_id into $shm_size.