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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 324373 $ -->
<section xml:id="internals2.opcodes.fetch-is">
<title>FETCH_IS</title>
<section xml:id="internals2.opcodes.fetch-is.code">
<title>PHP code</title>
<programlisting role="php">
<![CDATA[
<?php
/*
* Fetch the value from variable which is to be used to test if it is set or not, through isset()/isempty().
* opcode number: 89
*/
echo isset($_SESSION['userid']);
echo isset($_SESSION['userid'][1]);
echo isset($_SESSION->prop->prop);
?>
]]>
</programlisting>
</section>
<section xml:id="internals2.opcodes.fetch-is.listing">
<title>PHP opcodes</title>
<simpara>Function name: (null)</simpara>
<simpara>Compiled variables: none </simpara>
<informaltable>
<tgroup cols="7">
<thead>
<row>
<entry>line</entry><entry>#</entry><entry>op</entry>
<entry>fetch</entry><entry>ext</entry><entry>return</entry>
<entry>operands</entry>
</row>
</thead>
<tbody>
<row>
<entry>6</entry><entry>0</entry>
<entry>FETCH_IS</entry><entry></entry>
<entry></entry><entry>$0</entry>
<entry>'_SESSION'</entry>
</row>
<row>
<entry></entry><entry>1</entry>
<entry>ZEND_ISSET_ISEMPTY_DIM_OBJ</entry><entry></entry>
<entry>1</entry><entry>~1</entry>
<entry>$0,'userid'</entry>
</row>
<row>
<entry></entry><entry>2</entry>
<entry>ECHO</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~1</entry>
</row>
<row>
<entry>7</entry><entry>3</entry>
<entry>FETCH_IS</entry><entry></entry>
<entry></entry><entry>$2</entry>
<entry>'_SESSION'</entry>
</row>
<row>
<entry></entry><entry>4</entry>
<entry>FETCH_DIM_IS</entry><entry></entry>
<entry></entry><entry>$3</entry>
<entry>$2,'userid'</entry>
</row>
<row>
<entry></entry><entry>5</entry>
<entry>ZEND_ISSET_ISEMPTY_DIM_OBJ</entry><entry></entry>
<entry>1</entry><entry>~4</entry>
<entry>$3,1</entry>
</row>
<row>
<entry></entry><entry>6</entry>
<entry>ECHO</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~4</entry>
</row>
<row>
<entry>8</entry><entry>7</entry>
<entry>FETCH_IS</entry><entry></entry>
<entry></entry><entry>$5</entry>
<entry>'_SESSION'</entry>
</row>
<row>
<entry></entry><entry>8</entry>
<entry>FETCH_OBJ_IS</entry><entry></entry>
<entry></entry><entry>$6</entry>
<entry>$5,'prop'</entry>
</row>
<row>
<entry></entry><entry>9</entry>
<entry>ZEND_ISSET_ISEMPTY_PROP_OBJ</entry><entry></entry>
<entry></entry><entry>~7</entry>
<entry>$6,'prop'</entry>
</row>
<row>
<entry></entry><entry>10</entry>
<entry>ECHO</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~7</entry>
</row>
<row>
<entry>9</entry><entry>11</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>1</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
</section>
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