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<td valign="top" style="font-size: 13px"> <h2 id="email-title-heading" style="font-size: 16px; line-height: 20px; min-height: 20px; margin: 0; padding: 0"> <a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+12+Function_SHARED" style="color: #326ca6; text-decoration: none"> <img class="icon" src="cid:page-icon" alt="" style="border: 0; padding: 0 5px 0 0; text-align: left; vertical-align: middle" /> <strong style="font-size:16px;line-height:20px;vertical-align:top;">Asterisk 12 Function_SHARED</strong> </a> </h2> </td>
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<h1 id="Asterisk12Function_SHARED-SHARED%28%29">SHARED()</h1>
<h3 id="Asterisk12Function_SHARED-Synopsis">Synopsis</h3>
<p style="font-size: 13px">Gets or sets the shared variable specified.</p>
<h3 id="Asterisk12Function_SHARED-Description">Description</h3>
<p style="font-size: 13px">Implements a shared variable area, in which you may share variables between channels.</p>
<p style="font-size: 13px">The variables used in this space are separate from the general namespace of the channel and thus <code style="font-size: 13px">SHARED(foo)</code> and <code style="font-size: 13px">foo</code> represent two completely different variables, despite sharing the same name.</p>
<p style="font-size: 13px">Finally, realize that there is an inherent race between channels operating at the same time, fiddling with each others' internal variables, which is why this special variable namespace exists; it is to remind you that variables in the SHARED namespace may change at any time, without warning. You should therefore take special care to ensure that when using the SHARED namespace, you retrieve the variable and store it in a regular channel variable before using it in a set of calculations (or you might be surprised by the result).</p>
<h3 id="Asterisk12Function_SHARED-Syntax">Syntax</h3>
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<pre style="font-size: 13px">SHARED(varname,channel)</pre>
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<h5 id="Asterisk12Function_SHARED-Arguments">Arguments</h5>
<ul>
<li style="font-size: 13px"> <code style="font-size: 13px">varname</code> - Variable name</li>
<li style="font-size: 13px"> <code style="font-size: 13px">channel</code> - If not specified will default to current channel. It is the complete channel name: <code style="font-size: 13px">SIP/12-abcd1234</code> or the prefix only <code style="font-size: 13px">SIP/12</code>.</li>
</ul>
<h3 id="Asterisk12Function_SHARED-ImportVersion">Import Version</h3>
<p style="font-size: 13px">This documentation was imported from Asterisk Version SVN-branch-12-r397911</p>
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