利用PHP扩展vld查看PHP opcode
作者:zhanhailiang 日期:2013-03-04
首先下载最新版vld扩展：
~/public_html/php-5.3.13/ext> wget http://pecl.php.net/get/vld-0.11.2.tgz~/public_html/php-5.3.13/ext> tar zxvf vld-0.11.2.tgz ~/public_html/php-5.3.13/ext> cd vld-0.11.2/
接下来编译安装vld扩展：
~/public_html/php-5.3.13/ext/vld-0.11.2> phpize ~/public_html/php-5.3.13/ext/vld-0.11.2> ./configure --with-php-config=/usr/local/services/php/bin/php-config --enable-vld~/public_html/php-5.3.13/ext/vld-0.11.2> make~/public_html/php-5.3.13/ext/vld-0.11.2> sudo make installInstalling shared extensions: /usr/local/services/php/lib/php/extensions/no-debug-non-zts-20090626/
最后将生成的vld.so复制到extension_dir目录下：
~/public_html/php-5.3.13/ext/vld-0.11.2> cd /usr/local/services/php/lib/php/extensions/no-debug-non-zts-20090626//usr/local/services/php/lib/php/extensions/no-debug-non-zts-20090626> sudo cp vld.so /usr/local/services/php/extensions/
然后修改php.ini文件，添加如下配置：
extension=vld.so
接下来创建test.php文件：
<?php $a = "hello world"; echo $a . PHP_EOL;
使用cli来执行，查看生成的opcode：
~/public_html> php -dvld.active=1 test.php Finding entry pointsBranch analysis from position: 0Return foundfilename: /home/zhanhailiang/public_html/test.phpfunction name: (null)number of ops: 4compiled vars: !0 = $aline # * op fetch ext return operands--------------------------------------------- 3 0 > ASSIGN !0, 'hello+world' 5 1 CONCAT ~1 !0, '%0A' 2 ECHO ~1 6 3 > RETURN 1 branch: # 0; line: 3- 6; sop: 0; eop: 3path #1: 0, hello world
