php javascript C 变量环境 块级作用域

<?php
$w = 'w';
$wb = '123'.$w;
$w = 'ww';
echo $wb;

if(TRUE){
    $wd = '123wd';
}
echo $wd;
if(FALSE){
    $we = '123wd';
}
var_dump($we); 

 

posted @ 2016-10-19 15:51  papering  阅读(135)  评论(0编辑  收藏  举报