/**
* Sends a content type header
*
* @param string $mime
* @param string $charset
* @param boolean $send
* @return mixed
*/
public static function contentType($mime, $charset = 'UTF-8', $send = true)
{
if (f::extensionToMime($mime)) {
$mime = f::extensionToMime($mime);
}
$header = 'Content-type: ' . $mime;
if ($charset) {
$header .= '; charset=' . $charset;
}
if (!$send) {
return $header;
}
header($header);
}
/**
* Returns the mime type of a file
*
* @param string $file
* @return mixed
*/
public static function mime($file)
{
// stop for invalid files
if (!file_exists($file)) {
return null;
}
// Fileinfo is prefered if available
if (function_exists('finfo_file')) {
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $file);
finfo_close($finfo);
return $mime;
}
// for older versions with mime_content_type go for that.
if (function_exists('mime_content_type') && ($mime = @mime_content_type($file) !== false)) {
return $mime;
}
// shell check
try {
$mime = system::execute('file', [$file, '-z', '-b', '--mime'], 'output');
$mime = trim(str::split($mime, ';')[0]);
if (f::mimeToExtension($mime)) {
return $mime;
}
} catch (Exception $e) {
// no mime type detectable with shell
$mime = null;
}
// Mime Sniffing
$reader = new MimeReader($file);
$mime = $reader->get_type();
if (!empty($mime) && f::mimeToExtension($mime)) {
return $mime;
}
// guess the matching mime type by extension
return f::extensionToMime(f::extension($file));
}