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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Check whether a specific entry exists</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.shm-has-var" class="refentry">
<div class="refnamediv">
<h1 class="refname">shm_has_var</h1>
<p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7)</p><p class="refpurpose"><span class="refname">shm_has_var</span> &mdash; <span class="dc-title">Check whether a specific entry exists</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.shm-has-var-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>shm_has_var</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$shm_identifier</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$variable_key</code></span>
) : <span class="type">bool</span></div>
<p class="para rdfs-comment">
Checks whether a specific key exists inside a shared memory segment.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.shm-has-var-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">shm_identifier</code></dt>
<dd>
<p class="para">
Shared memory segment, obtained from <span class="function"><a href="shm_attach.html" class="function">shm_attach()</a></span>.
</p>
</dd>
<dt>
<code class="parameter">variable_key</code></dt>
<dd>
<p class="para">
The variable key.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.shm-has-var-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the entry exists, otherwise <strong><code>FALSE</code></strong>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.shm-has-var-seealso">
<h3 class="title">参见</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="shm_get_var.html" class="function" rel="rdfs-seeAlso">shm_get_var()</a> - Returns a variable from shared memory</span></li>
<li class="member"><span class="function"><a href="shm_put_var.html" class="function" rel="rdfs-seeAlso">shm_put_var()</a> - Inserts or updates a variable in shared memory</span></li>
</ul>
</p>
</div>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Check whether a specific entry exists</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.shm-has-var" class="refentry">
<div class="refnamediv">
<h1 class="refname">shm_has_var</h1>
<p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7)</p><p class="refpurpose"><span class="refname">shm_has_var</span> &mdash; <span class="dc-title">Check whether a specific entry exists</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.shm-has-var-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>shm_has_var</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$shm_identifier</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$variable_key</code></span>
) : <span class="type">bool</span></div>
<p class="para rdfs-comment">
Checks whether a specific key exists inside a shared memory segment.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.shm-has-var-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">shm_identifier</code></dt>
<dd>
<p class="para">
Shared memory segment, obtained from <span class="function"><a href="shm_attach.html" class="function">shm_attach()</a></span>.
</p>
</dd>
<dt>
<code class="parameter">variable_key</code></dt>
<dd>
<p class="para">
The variable key.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.shm-has-var-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the entry exists, otherwise <strong><code>FALSE</code></strong>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.shm-has-var-seealso">
<h3 class="title">参见</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="shm_get_var.html" class="function" rel="rdfs-seeAlso">shm_get_var()</a> - Returns a variable from shared memory</span></li>
<li class="member"><span class="function"><a href="shm_put_var.html" class="function" rel="rdfs-seeAlso">shm_put_var()</a> - Inserts or updates a variable in shared memory</span></li>
</ul>
</p>
</div>
</div></div></div></body></html>