<!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>Checks if a variable exists in the user cache</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.wincache-ucache-delete.html">wincache_ucache_delete</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.wincache-ucache-get.html">wincache_ucache_get</a></div> <div class="up"><a href="ref.wincache.html">WinCache Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.wincache-ucache-exists" class="refentry"> <div class="refnamediv"> <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 <em><code class="parameter">key</code></em> 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> <span class="term"><em><code class="parameter">key</code></em></span> <dd> <p class="para"> The <em><code class="parameter">key</code></em> that was used to store the variable in the cache. <em><code class="parameter">key</code></em> is case sensitive. </p> </dd> </dt> </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 <em><code class="parameter">key</code></em> 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-577"> <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> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.wincache-ucache-delete.html">wincache_ucache_delete</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.wincache-ucache-get.html">wincache_ucache_get</a></div> <div class="up"><a href="ref.wincache.html">WinCache Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>