PHP简单源码学习 书上的源代码，好多个，每个都要敲就烦死了，上网扣了段遍历文件的代码：http://www.web589.com/posts/808.html作者写得不错的嘛，注释非常详细
<?php phpinfo();?> $number = "5"; # $number is a string $sum = 15 + $number; # Add an integer and string to produce integer print("$sum\n");
