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141 lines
4.4 KiB
HTML
141 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Read data from shared memory block</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.shmop-read" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">shmop_read</h1>
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<p class="verinfo">(PHP 4 >= 4.0.4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">shmop_read</span> — <span class="dc-title">Read data from shared memory block</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.shmop-read-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>shmop_read</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$shmid</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$start</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$count</code></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>shmop_read()</strong></span> will read a string from shared memory block.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.shmop-read-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">shmid</code></dt>
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<dd>
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<p class="para">
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The shared memory block identifier created by
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<span class="function"><a href="shmop_open.html" class="function">shmop_open()</a></span>
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</p>
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</dd>
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<dt>
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<code class="parameter">start</code></dt>
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<dd>
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<p class="para">
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Offset from which to start reading
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</p>
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</dd>
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<dt>
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<code class="parameter">count</code></dt>
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<dd>
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<p class="para">
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The number of bytes to read.
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<em>0</em> reads <code class="code">shmop_size($shmid) - $start</code> bytes.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.shmop-read-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns the data 或者在失败时返回 <strong><code>FALSE</code></strong>.
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.shmop-read-changelog">
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<h3 class="title">更新日志</h3>
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>7.0.0</td>
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<td>
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The type of <code class="parameter">shmid</code> has been changed from
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<span class="type"><a href="language.types.integer.html" class="type int">int</a></span> to <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>.
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="refsect1 examples" id="refsect1-function.shmop-read-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-4458">
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<p><strong>Example #1 Reading shared memory block</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$shm_data </span><span style="color: #007700">= </span><span style="color: #0000BB">shmop_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$shm_id</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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<p class="para">
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This example will read 50 bytes from shared memory block and place the data
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inside <em>$shm_data</em>.
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.shmop-read-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="shmop_write.html" class="function" rel="rdfs-seeAlso">shmop_write()</a> - Write data into shared memory block</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |