~/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/

~/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/

~/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/

extension=vld.so

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

~/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