PHPBuilder - mime_lookup()



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mime_lookup()

by: Paul Southworth
|
May 30, 2001

Version: 1.1

Type: Function

Category: HTTP

License: BSD License

Description: See http://inebria.com/mime_lookup/ - this function parses the mime.types file, builds an array keyed by file extension, and the function mime_lookup() returns the mime type (if any) found for a given file extension. Newer versions might only be found on my web site.



<?
/* mime_lookup() function - returns the mime type when given a file
   extension. */

/* $Id: mime_lookup.php,v 1.1 2001/05/30 14:12:34 pauls Exp $ */

/* This software came from http://inebria.com/ */

/* Copyright (c) 2001
      Paul Southworth.  All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote
    products derived from this software without specific prior
    written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */


/* warning - if you have a file extension which appears more than
   once in your mime.types file, the last one found will win. */

/* where's your mime.types file? */

$mt_f="/usr/local/etc/apache/mime.types";

/* build an array keyed on the file ext */

if (is_readable($mt_f)) {
	$mime_types=array();
	/* open our mime.types file for reading */
	$mt_fd=fopen($mt_f,"r");
	while (!feof($mt_fd)) {
		/* pull a line off the file */
		$mt_buf=trim(fgets($mt_fd,1024));
		/* discard if the line was blank or started with a comment */
		if (strlen($mt_buf) > 0) if (substr($mt_buf,0,1) != "#") {
			/* make temp array of the mime.types line we just read */
			$mt_tmp=preg_split("/[\s]+/", $mt_buf, -1, PREG_SPLIT_NO_EMPTY);
			$mt_num=count($mt_tmp);
			/* if $mt_num = 1 then we got no file extensions for the type */
			if ($mt_num > 1) {
				for ($i=1;$i<$mt_num;$i++) {
					/* if we find a comment mid-line, stop processing */
					if (strstr($mt_tmp[$i],"#")) {
						break;
					/* otherwise stick the type in an array keyed by extension */
					} else {
						$mime_types[$mt_tmp[$i]]=$mt_tmp[0];
					}
				}
			/* zero the temporary array */
			unset($mt_tmp);
			}
		}
	}
	/* close the mime.types file we were reading */
	fclose($mt_fd);
} else {
	echo "ERROR: unreadable file " . $mt_f . "\n";
}

/* eg, mime_lookup("doc") returns "application/ms-word" */

function mime_lookup($ext) {
	global $mime_types;
	return $mime_types[$ext];
}
?>

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