/**
* Guesses the MIME type of the file
*
* Empty results are currently not handled:
* application/x-empty
* application/x-not-regular-file
*
* @param string $file
* @param options $options Valid options are:
* - `'paranoid'` If set to true only then content for the file is used for detection
* - `'properties'` Used for simplification, defaults to false
* - `'experimental'` Used for simplification, defaults to false
* @return mixed string with MIME type on success
* @access public
*/
function guessType($file, $options = array())
{
$_this =& MimeType::getInstance();
$defaults = array('paranoid' => false, 'properties' => false, 'experimental' => true);
extract($options + $defaults);
$magicMatch = $globMatch = array();
if (!$paranoid) {
if (is_a($_this->__glob, 'MimeGlob')) {
$globMatch = $_this->__glob->analyze($file);
}
if (count($globMatch) === 1) {
return MimeType::simplify(array_shift($globMatch), $properties, $experimental);
}
}
if (!is_readable($file)) {
return null;
}
if (is_a($_this->__magic, 'finfo')) {
$magicMatch = $_this->__magic->file($file);
} elseif ($_this->__magic === 'mime_magic') {
$magicMatch = mime_content_type($file);
} elseif (is_a($_this->__magic, 'MimeMagic')) {
$magicMatch = $_this->__magic->analyze($file);
}
$magicMatch = empty($magicMatch) ? array() : array($magicMatch);
if (empty($magicMatch)) {
$File =& new File($file);
if (preg_match('/[\\t\\n\\r]+/', $File->read(32))) {
return 'text/plain';
}
return 'application/octet-stream';
}
if (count($magicMatch) === 1) {
return MimeType::simplify(array_shift($magicMatch), $properties, $experimental);
}
if ($globMatch && $magicMatch) {
$combinedMatch = array_intersect($globMatch, $magicMatch);
if (count($combinedMatch) === 1) {
return MimeType::simplify(array_shift($combinedMatch), $properties, $experimental);
}
}
return null;
}
