// 这是 PHP 单行注释 /* 这是 PHP 多行 注释 */
<?php $txt1="Learn PHP"; $txt2="w3cschool.cc"; $cars=array("Volvo","BMW","Toyota"); echo $txt1; echo "<br>"; echo "Study PHP at $txt2"; echo "My car is a {$cars[0]}"; echo "<br>"; echo "{$txt1}"; ?>
原文：http://www.cnblogs.com/liguangao/p/5232428.html