利用PHP的VLD查询OPCODE

为了能更好的查看php的编译过程需要用VLD来查看php的编译的OPCODE代码:

1:下载 VLD扩展包:# wget http://pecl.php.net/get/vld-0.10.1.tgz  

2：安装:

# tar zxvf vld-0.10.1.tgz
# cd ./vld-0.10.1
# /usr/local/php/bin/phpize 或者直接phpize
# ./configure --with-php-config=/usr/local/php/bin/php-config --enable-vld
# make && make install

3:编辑php.ini文件加入vld扩张:extension="vld.so"#确保vld.so在扩张路径下面

然后需要重启Apache或者是nginx

<?php
$a = 1;
$b = $a++;
echo $b;
echo $a;

root@bogon no-debug-non-zts-20060613]# /usr/local/php/bin/php -dvld.active=1 /usr/src/source/test.php

Finding entry points
Branch analysis from position: 0
Return found
filename:       /usr/src/source/test.php
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a, !1 = $b
line     # *  op                           fetch          ext  return  operands
---------------------------------------------------------------------------------
   2     0  >   ASSIGN                                                   !0, 1
   3     1      POST_INC                                         ~1      !0
         2      ASSIGN                                                   !1, ~1
   4     3      ECHO                                                     !1
   5     4      ECHO                                                     !0
   6     5    > RETURN                                                   1
         6*   > ZEND_HANDLE_EXCEPTION                                    

branch: #  0; line:     2-    6; sop:     0; eop:     6
path #1: 0,