/**
* @param string $fileName
*
* @throws \Exception
* @return ImageInterface
*
* @todo add more sophisticated checks by inspecting file
*/
public static function fromFile($fileName)
{
$ext = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
switch ($ext) {
case 'jpg':
case 'jpeg':
return Format\JPEG::fromFile($fileName);
break;
case 'png':
return Format\PNG::fromFile($fileName);
break;
case 'webp':
return Format\WebP::fromFile($fileName);
break;
case 'psd':
return Format\PSD::fromFile($fileName);
break;
}
throw new \Exception('Unrecognised file name');
}
/**
* @param $string
*
* @return JPEG|WebP|PNG|false
*/
public static function fromString($string)
{
$len = strlen($string);
// try JPEG
if ($len >= 2) {
if (JPEG::SOI === substr($string, 0, 2)) {
return JPEG::fromString($string);
}
}
// try WebP
if ($len >= 4) {
if ('RIFF' === substr($string, 0, 4) && 'WEBP' === substr($string, 8, 4)) {
return WebP::fromString($string);
}
}
// try PNG
if ($len >= 8) {
if (PNG::SIGNATURE === substr($string, 0, 8)) {
return PNG::fromString($string);
}
}
return false;
}