php javascript C 变量环境 块级作用域

Posted 2020-08-15 rsapaper

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

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