View PHP opcode_PHP tutorial using PHP extension vld

~/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/

Next compile and install the vld extension:

~/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/

Finally copy the generated vld.so to the extension_dir directory:

~/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/

Then modify the php.ini file and add the following configuration:

extension=vld.so

Next create the test.php file:

$a = "hello world";

echo $a . PHP_EOL;

Use cli to execute and view the generated opcode:

~/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                                                                                                                                

-------------------------------------------------- ----------------------------------

3 0 > ASSIGN                                       ! 0, 'hello+world'

5 1 CONCAT

2 2 ECHO 1

6 3 > RETURN                                         1

branch: # 0; line: 3- 6; sop: 0; eop: 3

path #1: 0,

hello world

http://www.bkjia.com/PHPjc/477704.html

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477704.htmlTechArticle~/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/ Next compile.. .

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn