function _exif_get_data_from_file_uri

Get EXIF data from file or stream wrapper.

Caches the meta data in a static variable so we don't have to process the file several times.

Parameters

object $exif: EXIF class object.

string $file_uri: File or stream wrapper to get EXIF data from.

Return value

array EXIF meta data.

1 call to _exif_get_data_from_file_uri()

_exif_get_image_fields_metadata in ./exif.module

File

./exif.module, line 253

Code

function _exif_get_data_from_file_uri($exif, $file_uri) {
    $metadata =& drupal_static(__FUNCTION__);
    if (!isset($metadata) || !isset($metadata[$file_uri])) {
        if (stream_is_local($file_uri)) {
            // If $file_uri is a local stream pass the real path to
            // Exif::readMetadataTags().
            $absolute_file_path = drupal_realpath($file_uri);
            $metadata[$file_uri] = $exif->readMetadataTags($absolute_file_path);
        }
        else {
            // If $file_uri is not a local stream copy the file to local temp file and
            // pass that file to Exif::readMetadataTags.
            $tmp_name = drupal_tempnam(file_directory_temp(), 'exif') . '.' . pathinfo($file_uri, PATHINFO_EXTENSION);
            if (copy($file_uri, $tmp_name)) {
                $metadata[$file_uri] = $exif->readMetadataTags($tmp_name);
                @drupal_unlink($tmp_name);
            }
            else {
                // If we failed to create the temporary file make sure we at least
                // return an empty array.
                $metadata[$file_uri] = array();
            }
        }
    }
    return $metadata[$file_uri];
}