This was a talk given at the Sun JVM Languages summit on the PHP runtime in WebSphere sMash. For more information please visit http://www.projectzero.org. See also http://www.infoq.com/presentations/nicholson-php-jvm;jsessionid=25B17C308F85BF13354502DC6DF49A91 The Summit was mainly for language implementos so this is a very language specific presentation.

1. P8, IBM’s PHP on Java Virtual Machine TM Project Rob Nicholson [email_address]

5. How applications are supported. Zend Engine 2 ZE2 Extension interface file string pcre DOM App1 App2 App3 App4 PHP.net P8 file string pcre DOM App1 App2 App3 App4 XAPI-J todo XAPI-C todo ZE2 Extension interface sMash Apps depend on extensions which depend on ZE2 interfaces Array Array

7. Typical PHP inc1.php: <?php include “inc1.php”; $var=1; foo (“bar.php”,$var); include $var; ?> index.php: <?php function foo($a, &$b) { $b=$a; } ?>

8. PHP Request Processing. Program state Request functions classes constants Global variables Objects Execute includes

9. Shared nothing architecture

11. Function Invoke w/o methodHandles <?php function foo(){} foo(); bar(); ?> public class Bytecode1_rob_php extends AbstractBytecode { private static Invocable invocable1 ; private Invocable invocable2; public PHPValue run(Runtime runtime) { if ( invocable1 == null ) invocable1 = Op. jhGetInvocable (runtime, “foo” ); Op. jhCALL ( null , invocable1 , runtime, true ); // PHPValue returnVal = invocable1.bytecode.run(runtime); if ( invocable2 == null ) invocable2 = Op. jhGetInvocable (runtime, “bar” ); Op. jhCALL ( null , invocable2 , runtime, true ); // PHPValue returnVal = invocable2.bytecode.run(runtime ); return null ; } }

15. Questions…?