我们在开发过程中会请求URL并获取http请求发送的标头。比如查看301重定向的链接等信息
下面我们就模拟测试下get_header的使用方法
写一个重定向的测试文件，丢A服务器上
test.php
<?php header( "Location: http://www.baidu.com" ); ?>另一个文件，丢B服务器上。也就是我们用来发起请求的文件
$url="http://www.123.com/test.php"; $result=get_headers($url,1); print_r($result);打印结果
Array ( [0] => HTTP/1.1 302 Found [Server] => Array ( [0] => nginx/1.9.7 [1] => BWS/1.1 ) [Date] => Array ( [0] => Thu, 31 Oct 2019 09:33:13 GMT [1] => Thu, 31 Oct 2019 09:33:10 GMT ) [Content-Type] => Array ( [0] => text/html [1] => text/html ) [Content-Length] => Array ( [0] => 0 [1] => 14615 ) [Connection] => close [X-Powered-By] => PHP/5.5.26 [Location] => http://www.baidu.com [1] => HTTP/1.0 200 OK [Accept-Ranges] => bytes [Cache-Control] => no-cache [P3p] => Array ( [0] => CP=" OTI DSP COR IVA OUR IND COM " [1] => CP=" OTI DSP COR IVA OUR IND COM " ) [Pragma] => no-cache [Set-Cookie] => Array ( [0] => BAIDUID=587693442FB88E961CDD443BEC6573EE:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com [1] => BIDUPSID=587693442FB88E961CDD443BEC6573EE; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com [2] => PSTM=1572514390; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com [3] => BAIDUID=587693442FB88E96AC33252175C6E72D:FG=1; max-age=31536000; expires=Fri, 30-Oct-20 09:33:10 GMT; domain=.baidu.com; path=/; version=1; comment=bd ) [Traceid] => 157251439004187625068283715721969339934 [Vary] => Accept-Encoding [X-Ua-Compatible] => IE=Edge,chrome=1 )我们可以看到最终得到HTTP返回码 302
