自定义url变量转义方法

 
function base_encode($str) {
  
    $src  = array("/","+","=","?","&");
  
    $dist = array("_.a._","_.b._","_.c._","_.d._","_.e._");
  
  
  
    $new  = str_replace($src,$dist,$str);
  
    return $new;
  
}
  
function base_decode($str) {
  
        $src = array("_.a._","_.b._","_.c._","_.d._","_.e._");
  
        $dist  = array("/","+","=","?","&");
  
        $new  = str_replace($src,$dist,$str);
  
        return $new;
  
}