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<title>Checks if a variable exists in the user cache</title>
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<h1 class="refname">wincache_ucache_exists</h1>
<p class="verinfo">(PECL wincache >= 1.1.0)</p><p class="refpurpose"><span class="refname">wincache_ucache_exists</span> — <span class="dc-title">
Checks if a variable exists in the user cache
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.wincache-ucache-exists-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>wincache_ucache_exists</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$key</code></span>
)</div>
<p class="para rdfs-comment">
Checks if a variable with the <code class="parameter">key</code> exists in the user cache or not.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.wincache-ucache-exists-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">key</code></dt>
<dd>
<p class="para">
The <code class="parameter">key</code> that was used to store the variable in the cache.
<code class="parameter">key</code> is case sensitive.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.wincache-ucache-exists-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if variable with the <code class="parameter">key</code> exitsts,
otherwise returns <strong><code>FALSE</code></strong>.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.wincache-ucache-exists-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-661">
<p><strong>Example #1 Using <span class="function"><strong>wincache_ucache_exists()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">wincache_ucache_exists</span><span style="color: #007700">(</span><span style="color: #DD0000">'green'</span><span style="color: #007700">))<br /> </span><span style="color: #0000BB">wincache_ucache_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'green'</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">wincache_ucache_exists</span><span style="color: #007700">(</span><span style="color: #DD0000">'green'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
bool(true)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.wincache-ucache-exists-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.wincache-ucache-set.html" class="function" rel="rdfs-seeAlso">wincache_ucache_set()</a> - Adds a variable in user cache and overwrites a variable if it already exists in the cache</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-add.html" class="function" rel="rdfs-seeAlso">wincache_ucache_add()</a> - Adds a variable in user cache only if variable does not already exist in the cache</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-get.html" class="function" rel="rdfs-seeAlso">wincache_ucache_get()</a> - Gets a variable stored in the user cache</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-clear.html" class="function" rel="rdfs-seeAlso">wincache_ucache_clear()</a> - Deletes entire content of the user cache</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-delete.html" class="function" rel="rdfs-seeAlso">wincache_ucache_delete()</a> - Deletes variables from the user cache</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-meminfo.html" class="function" rel="rdfs-seeAlso">wincache_ucache_meminfo()</a> - Retrieves information about user cache memory usage</span></li>
<li class="member"><span class="function"><a href="function.wincache-ucache-info.html" class="function" rel="rdfs-seeAlso">wincache_ucache_info()</a> - Retrieves information about data stored in the user cache</span></li>
</ul>
</p>
</div>
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