Source

File: wp-includes/pomo/mo.php

function &make_entry( $original, $translation ) {
			$entry = new Translation_Entry();
			// Look for context, separated by \4.
			$parts = explode( "\4", $original );
			if ( isset( $parts[1] ) ) {
				$original       = $parts[1];
				$entry->context = $parts[0];
			}
			// Look for plural original.
			$parts           = explode( "\0", $original );
			$entry->singular = $parts[0];
			if ( isset( $parts[1] ) ) {
				$entry->is_plural = true;
				$entry->plural    = $parts[1];
			}
			// Plural translations are also separated by \0.
			$entry->translations = explode( "\0", $translation );
			return $entry;
		}