Code Examples -> This gets the http response headers for a given url and returns them in an assoc array. i.e. to test if a url exists: $array = get_http_headers($url); if($array[result]=200) { }

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PHP Code Examples

Title :	This gets the http response headers for a given url and returns them in an assoc array. i.e. to test if a url exists: $array = get_http_headers($url); if($array[result]=200) { }
Categories :	HTTP, Arrays, PHP	Mark Jeftovic
Date :	Jan 17th 1999
Grade :	4 of 5 (graded 3 times)
Viewed :	7972
File :	No file for this code example.
Images :	No Images for this code example.

Search :	More code by Mark Jeftovic
Action :	Grade This Code Example
Tools :	My Examples List

Code

<?php
//
// get_http_headers.php3 v1.1 1998/11/24
//
// Copyright (c) 1998 Mark Jeftovic / easyDNS Technologies Inc.
// email: markjr@easyDNS.com
//
// All rights reserved.
// This code provided "As Is" with no warrantees express or implied.
// The author and contributors are not liable for anything good or
// bad that results from your use of this code.
//
// You are free to distribute this for free provided this notice is
// included. Please forward fixes/enhancements to the author for
// inclusion in the next revision.
//
// USAGE: $array = get_http_headers.php3($url,$proto);
// $url is in the form http://www.somewhere
// $proto is optional default is HTTP/1.0
//
// RETURNS: an associative array with the keys set to the header name
// (lowercased) with the first line of headers (the result line)
// split up into:
// $array[result] = i.e. 200 or 301 or 403 or 404, etc
// $array[protocol] = protocol server used to answer
// $array[message] = i.e. "OK" or "FORBIDDEN" etc.
//
// HISTORY: 1.1 Nov 24/98
// -1 line fix from Gary E. Bickford, garyb@slb.com
// for when $uri[path] turns out to be null

function get_http_headers ($url,$proto= "HTTP/1.0") {

if(!eregi( "^http://", $url)) { $url = "http://".$url; }
$uri = parse_url($url);
$port = ( $uri[ "port"] ? $uri[ "port"] : 80 );
# open a socket to the server
$sock = fsockopen($uri[host],$port);
if(!$sock) { return(-1); }
if (!strlen($uri[path])) {$uri[path] = "/";}
$req=sprintf( "HEAD %s %s\n\n", $uri[path], $proto);

# send the request
fputs($sock, $req);

# get the headers
while(!feof($sock)):
$this_out = fgets($sock,100);
$output.= $this_out;
endwhile;
fclose($sock);

# parse them into a hash
$hdr=split( "\n",$output);
list($array[ "protocol"], $array[ "result"], $array[ "message"]) = split("[[:space:]]+", $hdr[0], 3);

for($i=1,$num=count($hdr);$i<$num;$i++) {
list($key, $val)=split( ":[[:space:]]*", $hdr[$i],2);
$array[strtolower($key)]=$val;

}

return($array);
}
?>

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User Comments

	Steve Doty wrote :1 Cool example. Almost what I needed, I wanted something that returns the content-length & content-type also. To do that I had to replace the dash '-' char to a underscore '_' in the $key value.$array[] can not use dashes in val names. Without this you can not return content-length or content-type. you can add a str_replace call. $strkey = str_replace("-","_",$key); in this 'for' statment to fix it. for($i=1,$num=count($hdr);$i<$num;$i++) { list($key, $val)=split( ":[[:space:]]*", $hdr[$i],2); $strkey = str_replace("-","_",$key); $array[strtolower($strkey)]=$val; }