在php [重复]中检查网址是否有效

Question

This question already has an answer here:

• How can I check if a URL exists via PHP? 21 answers

I need to check the given short url is active or not. and used the following php function to get the url information, after get the expanded url.

get_headers($original_url);

And the result is not correct. I test this using the currently active url.

Any other way to find?

Thanks in advance.

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Answer 1

To check if remote file exist or not use cUrl for that:

$ch = curl_init('http://example.com/index.php');

curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// $retcode > 400 -> not found, $retcode = 200, found.

if ($retcode == 200) {
    $isUrlOk = true;
} else {
    $isUrlOk = false;
}

curl_close($ch);