如何在php中检查给定的URL是否存在？

Question

I have URL like this " http://example.com/index.php?id=10 ". How can i check whether this URL exists or not?

Answer 1

Use the get_headers function.

$url = 'http://www.example.com';    
$headers = get_headers($url, 1);

if ($headers !== false && substr($headers[0], 9, 3) == 200) {
    echo 'Page exists';
}

Answer 2

If the website is properly set up, you should get a 200 OK status code if the URL exists and you are allowed to see it. You can check this with curl:

$http = curl_init("http://example.com/index.php?id=10");
curl_exec($http);
$responseCode = curl_getinfo($http, CURLINFO_HTTP_CODE);
if($responseCode == 200)
    //Page exists

Code not tested