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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 324373 $ -->
<section xml:id="internals2.opcodes.qm-assign">
<title>QM_ASSIGN</title>
<section xml:id="internals2.opcodes.qm-assign.code">
<title>PHP code</title>
<programlisting role="php">
<![CDATA[
<?php
/*
* Question Mark Assign, used twice inside a question mark assign to temporarily assign result as value1 (this is followed up with an ASSIGN bytecode)
* opcode number: 22
*/
function A(){
echo 1?2:3;
}
function B(){
$b = 0;
$a = $b > 1 ? 10: 11;
}
?>
]]>
</programlisting>
</section>
<section xml:id="internals2.opcodes.qm-assign.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>NOP</entry><entry></entry>
<entry></entry><entry></entry>
<entry></entry>
</row>
<row>
<entry>10</entry><entry>1</entry>
<entry>NOP</entry><entry></entry>
<entry></entry><entry></entry>
<entry></entry>
</row>
<row>
<entry>14</entry><entry>2</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>1</entry>
</row>
</tbody>
</tgroup>
</informaltable>
<simpara>Function name: A</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>7</entry><entry>0</entry>
<entry>JMPZ</entry><entry></entry>
<entry></entry><entry></entry>
<entry>1,->3</entry>
</row>
<row>
<entry></entry><entry>1</entry>
<entry>QM_ASSIGN</entry><entry></entry>
<entry></entry><entry>~0</entry>
<entry>2</entry>
</row>
<row>
<entry></entry><entry>2</entry>
<entry>JMP</entry><entry></entry>
<entry></entry><entry></entry>
<entry>->4</entry>
</row>
<row>
<entry></entry><entry>3</entry>
<entry>QM_ASSIGN</entry><entry></entry>
<entry></entry><entry>~0</entry>
<entry>3</entry>
</row>
<row>
<entry></entry><entry>4</entry>
<entry>ECHO</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~0</entry>
</row>
<row>
<entry>8</entry><entry>5</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>null</entry>
</row>
</tbody>
</tgroup>
</informaltable>
<simpara>Function name: B</simpara>
<simpara>Compiled variables: !0=$b, !1=$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>11</entry><entry>0</entry>
<entry>ASSIGN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>!0,0</entry>
</row>
<row>
<entry>12</entry><entry>1</entry>
<entry>IS_SMALLER</entry><entry></entry>
<entry></entry><entry>~1</entry>
<entry>1,!0</entry>
</row>
<row>
<entry></entry><entry>2</entry>
<entry>JMPZ</entry><entry></entry>
<entry></entry><entry></entry>
<entry>~1,->5</entry>
</row>
<row>
<entry></entry><entry>3</entry>
<entry>QM_ASSIGN</entry><entry></entry>
<entry></entry><entry>~2</entry>
<entry>10</entry>
</row>
<row>
<entry></entry><entry>4</entry>
<entry>JMP</entry><entry></entry>
<entry></entry><entry></entry>
<entry>->6</entry>
</row>
<row>
<entry></entry><entry>5</entry>
<entry>QM_ASSIGN</entry><entry></entry>
<entry></entry><entry>~2</entry>
<entry>11</entry>
</row>
<row>
<entry></entry><entry>6</entry>
<entry>ASSIGN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>!1,~2</entry>
</row>
<row>
<entry>13</entry><entry>7</entry>
<entry>RETURN</entry><entry></entry>
<entry></entry><entry></entry>
<entry>null</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
</section>
|
