PHP OC_Image::loadFromdata示例

//$y2 = isset($_POST['y2']) ? $_POST['y2'] : -1;
$w = isset($_POST['w']) && $_POST['w'] ? $_POST['w'] : -1;
$h = isset($_POST['h']) && $_POST['h'] ? $_POST['h'] : -1;
$tmpkey = isset($_POST['tmpkey']) ? $_POST['tmpkey'] : '';
$id = isset($_POST['id']) ? $_POST['id'] : '';
if ($tmpkey == '') {
    bailOut('Missing key to temporary file.');
}
if ($id == '') {
    bailOut('Missing contact id.');
}
OCP\Util::writeLog('contacts', 'savecrop.php: key: ' . $tmpkey, OCP\Util::DEBUG);
$data = OC_Cache::get($tmpkey);
if ($data) {
    $image = new OC_Image();
    if ($image->loadFromdata($data)) {
        $w = $w != -1 ? $w : $image->width();
        $h = $h != -1 ? $h : $image->height();
        OCP\Util::writeLog('contacts', 'savecrop.php, x: ' . $x1 . ' y: ' . $y1 . ' w: ' . $w . ' h: ' . $h, OCP\Util::DEBUG);
        if ($image->crop($x1, $y1, $w, $h)) {
            if ($image->width() <= 200 && $image->height() <= 200 || $image->resize(200)) {
                $vcard = OCA\Contacts\App::getContactVCard($id);
                if (!$vcard) {
                    OC_Cache::remove($tmpkey);
                    bailOut(OCA\Contacts\App::$l10n->t('Error getting contact object.'));
                }
                if ($vcard->__isset('PHOTO')) {
                    OCP\Util::writeLog('contacts', 'savecrop.php: PHOTO property exists.', OCP\Util::DEBUG);
                    $property = $vcard->__get('PHOTO');
                    if (!$property) {
                        OC_Cache::remove($tmpkey);