这些PHP的概念,有些刚开始比较难懂,很难理解,我把他们都列出来,希望能帮助一些人,在前进的路上少点荆棘。 1. variable variables(变量的变量) variable_variables.php 复制代码 代码如下:<?php$a = ‘hello’;$hello = ‘hello everyone’; echo $$a.'’; $b = ‘John’;$c = ‘Mary’;$e = ‘Joe’; $students = array(‘b’,’c’,’e’); echo ${$students[1]};/*foreach($students as $seat){