0

I'm trying to use vld to view opcode of a php file

prep

I've installed vld with:

pecl install channel://pecl.php.net/vld-0.12.0

To get familiar with VLD, I'm trying to compare to php files (echo1 and echo2)

echo1.php

<?php
echo "Hello"." "."World";

echo2.php

<?php
echo "Hello"," ","World";

phpinfo() shows that vld seems to be enabled:

vld support        enabled

Directive   Local Value Master Value
vld.active         0    0
vld.col_sep             
vld.dump_paths     1    1
vld.execute        1    1
vld.format         0    0
vld.save_dir       /tmp /tmp
vld.save_paths     0    0
vld.skip_append    0    0
vld.skip_prepend   0    0
vld.verbosity      1    1

problem

running php files shows output instead of opcode

# php -dvld.active=1 -f echo1.php
Hello World

# php -dvld.active=1 -dvld.execute=0 -f echo1.php
Hello World

# php -dvld.active=1 -f echo2.php
Hello World

# php -dvld.active=1 -dvld.execute=0 -f echo2.php
Hello World

Obviously I'm missing something :)

versions running

php version

# php -v
PHP 5.4.4-14+deb7u14 (cli) (built: Aug 21 2014 08:36:44)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies

Running Debian in Virtualbox with Apache 2.2.22

Paul
  • 46
  • 8

2 Answers2

2

After updating to PHP 5.6.2 I gave it another go and it is running :)

php version

# php -v
PHP 5.6.2 (cli) (built: Oct 17 2014 07:22:10)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies
    with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2014, by Zend Technologies

install pear

yum install php56w-pear

installing vld

pecl install vld

add extension to /etc/php.ini (or in file in /etc/php.d/__.ini)

#/etc/php.d/vld.ini
extension=vld.so

restart httpd service and test again (fingers crossed)

 # php -dvld.active=1 -f echo1.php
 Finding entry points
 Branch analysis from position: 0
 Jump found. Position 1 = -2
 filename:       /var/www/html/echo1.php
 function name:  (null)
 number of ops:  4
 compiled vars:  none
 line     #* E I O op                           fetch          ext  return  operands
 -------------------------------------------------------------------------------------
    2     0  E >   CONCAT                                           ~0      'Hello', '+'
          1        CONCAT                                           ~1      ~0, 'World'
          2        ECHO                                                     ~1
    3     3      > RETURN                                                   1

 branch: #  0; line:     2-    3; sop:     0; eop:     3; out1:  -2
 path #1: 0,
 Hello World

Boom Baby!

I don't know why, but it is working as expected :)

Now the OPCODE adventures can begin (also a love story)

Paul
  • 46
  • 8
0

You might be add extension.so to wrong php.ini file

You might be add the extension to php.ini that use by your webserver instead of cli version

What you can do is run locate php.ini, and choose the cli version of php.ini and add extension.so to that file

Normally cli version of php.ini located at /etc/php5/cli/php.ini

Dont forget to restart your console too

slier
  • 6,511
  • 6
  • 36
  • 55
  • Thanks for the reply, however i do not have this cli php.ini file. `locate php.ini` only showed `/etc/php.ini` Double checked this with `php -i | grep php.ini` `Loaded Configuration File => /etc/php.ini` – Paul Jan 26 '15 at 12:46