PHP学习笔记

来源：互联网发布：淘宝上二手苹果6可信吗编辑：程序博客网时间：2024/06/06 02:58

一、file_get_contents()函数可以把一个文件（我理解就是一个URL）读入一个字符串。请问php能得到访问这个链接的状态码么？比如200是成功，404是错误等等。

RE1：

$curl = curl_init();
$url=’http://www.smdcn.net’;
curl_setopt($curl, CURLOPT_URL, $url); //设置URL
curl_setopt($curl, CURLOPT_HEADER, 1); //获取Header
curl_setopt($curl,CURLOPT_NOBODY,true); //请求，不需要body
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); //数据存到成字符串吧，别给我直接输出到屏幕了
$data = curl_exec($curl); //开始执行
echo curl_getinfo($curl,CURLINFO_HTTP_CODE); //获取HTTPSTAT码
curl_close($curl); //用完记得关掉他

RE2：

var_dump(get_headers("http://www.baidu.com")); // 这个不需要php curl扩展

<?php
$url = 'http://www.example.com';
print_r(get_headers($url));
print_r(get_headers($url, 1));
?>

The above example will outputsomething similar to:

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
)