利用PHP擴展vld查看PHP opcode操作步驟

2024-05-04 23:08:39

字體：大中小

供稿：網(wǎng)友

首先下載最新版vld擴展：

復(fù)制代碼代碼如下:

~/public_html/php-5.3.13/ext> wget
~/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/

接下來編譯安裝vld擴展：

復(fù)制代碼代碼如下:

~/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 install
Installing shared extensions: /usr/local/services/php/lib/php/extensions/no-debug-non-zts-20090626/

最后將生成的vld.so復(fù)制到extension_dir目錄下：

復(fù)制代碼代碼如下:

~/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：

復(fù)制代碼代碼如下:

extension=vld.so

接下來創(chuàng)建test.php文件：

復(fù)制代碼代碼如下:

<?php
$a = "hello world";
echo $a . PHP_EOL;

使用cli來執(zhí)行，查看生成的opcode：

復(fù)制代碼代碼如下:

~/public_html> php -dvld.active=1 test.php
Finding entry points
Branch analysis from position: 0
Return found
filename: /home/zhanhailiang/public_html/test.php
function name: (null)
number of ops: 4
compiled vars: !0 = $a
line # * 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: 3
path #1: 0,
hello world