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    copied!<p>If your running php5 you can use:</p> <pre><code>$url = 'http://www.example.com'; print_r(get_headers($url, 1)); </code></pre> <p>Alternatively with php4 a user has contributed the following:</p> <pre><code>/** This is a modified version of code from "stuart at sixletterwords dot com", at 14-Sep-2005 04:52. This version tries to emulate get_headers() function at PHP4. I think it works fairly well, and is simple. It is not the best emulation available, but it works. Features: - supports (and requires) full URLs. - supports changing of default port in URL. - stops downloading from socket as soon as end-of-headers is detected. Limitations: - only gets the root URL (see line with "GET / HTTP/1.1"). - don't support HTTPS (nor the default HTTPS port). */ if(!function_exists('get_headers')) { function get_headers($url,$format=0) { $url=parse_url($url); $end = "\r\n\r\n"; $fp = fsockopen($url['host'], (empty($url['port'])?80:$url['port']), $errno, $errstr, 30); if ($fp) { $out = "GET / HTTP/1.1\r\n"; $out .= "Host: ".$url['host']."\r\n"; $out .= "Connection: Close\r\n\r\n"; $var = ''; fwrite($fp, $out); while (!feof($fp)) { $var.=fgets($fp, 1280); if(strpos($var,$end)) break; } fclose($fp); $var=preg_replace("/\r\n\r\n.*\$/",'',$var); $var=explode("\r\n",$var); if($format) { foreach($var as $i) { if(preg_match('/^([a-zA-Z -]+): +(.*)$/',$i,$parts)) $v[$parts[1]]=$parts[2]; } return $v; } else return $var; } } } </code></pre> <p>Both would have a result similar to:</p> <pre><code>Array ( [0] =&gt; HTTP/1.1 200 OK [Date] =&gt; Sat, 29 May 2004 12:28:14 GMT [Server] =&gt; Apache/1.3.27 (Unix) (Red-Hat/Linux) [Last-Modified] =&gt; Wed, 08 Jan 2003 23:11:55 GMT [ETag] =&gt; "3f80f-1b6-3e1cb03b" [Accept-Ranges] =&gt; bytes [Content-Length] =&gt; 438 [Connection] =&gt; close [Content-Type] =&gt; text/html ) </code></pre> <p>Therefore you could just check to see that the header response was OK eg:</p> <pre><code>$headers = get_headers($url, 1); if ($headers[0] == 'HTTP/1.1 200 OK') { //valid } if ($headers[0] == 'HTTP/1.1 301 Moved Permanently') { //moved or redirect page } </code></pre> <p><a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html" rel="noreferrer" title="W3C Codes and Definitions">W3C Codes and Definitions</a></p>
 

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