php菜鸟一问

Question

$__arr1 = explode("/",$_SERVER['REQUEST_URI']);
$__arr2 = array_reverse(explode(DIRECTORY_SEPARATOR,VANGV_ROOT));
$len = strlen($_SERVER['SERVER_PROTOCOL'])-strlen(substr($_SERVER['SERVER_PROTOCOL'],strpos($_SERVER['SERVER_PROTOCOL'],'/'),strlen($_SERVER['SERVER_PROTOCOL'])));
$protocol = strtolower(substr($_SERVER['SERVER_PROTOCOL'],0,$len));
$vcet_location = $protocol.'://'. $_SERVER['SERVER_NAME'].($_SERVER['SERVER_PORT']=="80"?"":':'.$_SERVER['SERVER_PORT']).'/';
for($___i=1; $___i<count($__arr1); $___i++){
if($__arr1[$___i] === $__arr2[$___i]){
$vcet_location .= "{$__arr1[$___i]}/";
}
}
$vcet_location = substr($vcet_location,0,-1);
unset($__arr1);unset($__arr2);unset($len);unset($protocol);

Answer 1

/* 变量初始化(包含头文件)
...
...
... 
*/
$__arr1 = explode("/",$_SERVER['REQUEST_URI']); 
$__arr2 = array_reverse(explode(DIRECTORY_SEPARATOR,VANGV_ROOT)); 
$len = strlen($_SERVER['SERVER_PROTOCOL'])-strlen(substr($_SERVER['SERVER_PROTOCOL'],strpos($_SERVER['SERVER_PROTOCOL'],'/'),strlen($_SERVER['SERVER_PROTOCOL']))); 
$protocol = strtolower(substr($_SERVER['SERVER_PROTOCOL'],0,$len)); 
$vcet_location = $protocol.'://'. $_SERVER['SERVER_NAME'].($_SERVER['SERVER_PORT']=="80"?"":':'.$_SERVER['SERVER_PORT']).'/'; 
for($___i=1; $___i <count($__arr1); $___i++){ 
if($__arr1[$___i] === $__arr2[$___i]){ 
$vcet_location .= "{$__arr1[$___i]}/"; 
} 
} 
$vcet_location = substr($vcet_location,0,-1); 
unset($__arr1);unset($__arr2);unset($len);unset($protocol);/* ...函数封装 
    ...
   ... */