PHP Goodies

file_get_mime.php

<?php

function file_get_mime($filename) {
	$extension = pathinfo($filename, PATHINFO_EXTENSION);

	$mimes = array(
		'audio/mp4' => 'm4a|f4a|f4b',
		'audio/ogg' => 'oga|ogg',
		'audio/&' => 'mid|midi|mp3|wav',
		'application/javascript' => 'js|jsonp',
		'application/json' => 'json',
		'application/msword' => 'doc|dot',
		'application/octet-stream' => 'bin',
		'application/postscript' => 'ai',
		'application/vnd.openxmlformats-officedocument.presentationml.presentation' => 'pptx',
		'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' => 'xlsx',
		'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => 'docx',
		'application/vnd.ms-excel' => 'xla|xls|xlt',
		'application/vnd.ms-fontobject' => 'eot',
		'application/vnd.ms-powerpoint' => 'pot|ppa|pps|ppt',
		'application/x-shockwave-flash' => 'swf',
		'application/xml' => 'atom|rdf|rss|xml',
		'application/&' => 'pdf|rtf|zip',
		'font/opentype' => 'otf',
		'font/&' => 'ttf|ttc|woff',
		'image/jpeg' => 'jpe|jpeg|jpg',
		'image/svg+xml' => 'svg|svgz',
		'image/vnd.adobe.photoshop' => 'psd',
		'image/vnd.microsoft.icon' => 'ico',
		'image/&' => 'bmp|ief|gif|png|tif|tiff|webp',
		'text/cache-manifest' => 'appcache|manifest',
		'text/plain' => 'txt',
		'text/x-component' => 'htc',
		'text/x-vcard' => 'vcf',
		'text/&' => 'css|html|php|vtt',
		'text/x-&' => 'markdown|md',
		'video/mp4' => 'mp4|m4v|f4v|f4p',
		'video/ogg' => 'ogv',
		'video/quicktime' => 'mov|qt',
		'video/&' => 'avi|mpg|vdo|viv|vivo|webm',
		'video/x-&' => 'flv'
	);

	foreach ($mimes as $type => $exts) if (preg_match('/^('.$exts.')$/', $extension)) return preg_replace('/&/', $extension, $type);

	return 'text/html';
}

header_cache.php

<?php

function header_cache($time) {
	$headLastModified = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
	$fileLastModified = gmdate('D, d M Y H:i:s T', $time);

	header('Cache-Control: public');
	header('Last-Modified: '.$fileLastModified);

	$lastModifiedMatches = $fileLastModified == $headLastModified;

	if ($lastModifiedMatches) header($_SERVER['SERVER_PROTOCOL'].' 304 Not Modified', true, 304);

	return $lastModifiedMatches;
}

readfile_chunked.php

<?php

function readfile_chunked($filename, $return_bytes = true) {
	$buffer = '';
	$bytes = 0;

	$handle = fopen($filename, 'rb');

	if ($handle === false) return false;

	while (!feof($handle)) {
		$buffer = fread($handle, 1024 * 1024);

		print($buffer);

		ob_flush();
		flush();

		if ($return_bytes) $bytes += strlen($buffer);
	}

	$status = fclose($handle);

	if ($return_bytes && $status) return $bytes;

	return $status;
}