wp-admin/includes/media.php:3781Parses creation date from media metadata.
$metadataarrayint|falsefunction wp_get_media_creation_timestamp( $metadata ) { $creation_date = false; if ( empty( $metadata['fileformat'] ) ) { return $creation_date; } switch ( $metadata['fileformat'] ) { case 'asf': if ( isset( $metadata['asf']['file_properties_object']['creation_date_unix'] ) ) { $creation_date = (int) $metadata['asf']['file_properties_object']['creation_date_unix']; } break; case 'matroska': case 'webm': if ( isset( $metadata['matroska']['comments']['creation_time'][0] ) ) { $creation_date = strtotime( $metadata['matroska']['comments']['creation_time'][0] ); } elseif ( isset( $metadata['matroska']['info'][0]['DateUTC_unix'] ) ) { $creation_date = (int) $metadata['matroska']['info'][0]['DateUTC_unix']; } break; case 'quicktime': case 'mp4': if ( isset( $metadata['quicktime']['moov']['subatoms'][0]['creation_time_unix'] ) ) { $creation_date = (int) $metadata['quicktime']['moov']['subatoms'][0]['creation_time_unix']; } break; } return $creation_date;}Introduced in 4.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.