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<?php
$url1
=
'http://www.91hi.net/web/demo/1.jpg'
//exists
$url2
=
'http://91hi.net/web/demo/www/jd/image/logo.png'
; //not exists
$get1
=get_headers(
$url1
);
$get2
=get_headers(
$url2
);
print_r(
$get1
);
print_r(
$get2
);
|
返回结果:
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Array
(
[0] => HTTP/1.1 404 Not Found
[1] =>
Date
: Tue, 14 Mar 2017 10:58:00 GMT
[2] => Server: Apache
[3] => Vary: User-Agent,Accept-Encoding
[4] => Connection: close
[5] => Content-Type: text/html
)
Array
(
[0] => HTTP/1.1 200 OK
[1] =>
Date
: Tue, 14 Mar 2017 10:58:00 GMT
[2] => Server: Apache
[3] => Last-Modified: Wed, 09 Nov 2016 08:57:06 GMT
[4] => ETag:
"2162a05-13f5-540da70f97c80"
[5] => Accept-Ranges: bytes
[6] => Content-Length: 5109
[7] => Vary: User-Agent
[8] => Connection: close
[9] => Content-Type: image/png
)
可以看到返回的http状态信息组成的一维数组.且第一个数组单元为响应状态信息.
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于是乎，通过获取到的状态码，用来判断远程资源是否存在。
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$statusCode
=
substr
(
$get1
[0], 9, 3);
if
(
$statusCode
== 200 ||
$statusCode
== 304){
echo
"It's exists."
}
else
{
echo
"It's not exists."
}
|
本文转自 hgditren 51CTO博客，原文链接：http://blog.51cto.com/phpme/1906497，如需转载请自行联系原作者
