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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 324373 $ -->
<section xml:id="internals2.opcodes.isset-isempty-var">
<title>ISSET_ISEMPTY_VAR</title>
<section xml:id="internals2.opcodes.isset-isempty-var.code">
<title>PHP code</title>
<programlisting role="php">
<![CDATA[
<?php
/*
* Tests if the value of a variable is set or not.
* opcode number: 114
*/
if(isset($a)){ return 0;}
?>
]]>
</programlisting>
</section>
<section xml:id="internals2.opcodes.isset-isempty-var.listing">
<title>PHP opcodes</title>
<simpara>Function name: (null)</simpara>
<simpara>Compiled variables: !0=$a </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>ZEND_ISSET_ISEMPTY_VAR</entry><entry></entry>
<entry>5</entry><entry>~0</entry>
<entry>!0</entry>
</row>
<row>
<entry></entry><entry>1</entry>
<entry>JMPZ</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~0,->4</entry>
</row>
<row>
<entry></entry><entry>2</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>0</entry>
</row>
<row>
<entry></entry><entry>3</entry>
<entry>JMP</entry><entry></entry>
<entry></entry><entry></entry>
<entry>->4</entry>
</row>
<row>
<entry>7</entry><entry>4</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>1</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
</section>
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