這篇文章主要介紹了關於PHP判斷連結是否有效 的方法,有著一定的參考價值,現在分享給大家,有需要的朋友可以參考一下
get_headers — 取得伺服器響應一個 HTTP 要求所發送的所有標題
array get_headers ( string $url [, int $format ] )
如果地址有效則返回一個數組,否則返回false,當第二個參數為1時,會解析相應的資訊並設定數組的鍵名,返回關聯陣列
eg:
<?php$url = 'http://www.investfree-brk.com';print_r(get_headers($url));print_r(get_headers($url, 1));?>
以上結果輸出如下:
Array( [0] => HTTP/1.1 200 OK [1] => Date: Sat, 29 May 2004 12:28:13 GMT [2] => Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) [3] => Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT [4] => ETag: "3f80f-1b6-3e1cb03b" [5] => Accept-Ranges: bytes [6] => Content-Length: 438 [7] => Connection: close [8] => Content-Type: text/html)Array( [0] => HTTP/1.1 200 OK [Date] => Sat, 29 May 2004 12:28:14 GMT [Server] => Apache/1.3.27 (Unix) (Red-Hat/Linux) [Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT [ETag] => "3f80f-1b6-3e1cb03b" [Accept-Ranges] => bytes [Content-Length] => 438 [Connection] => close [Content-Type] => text/html)
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