$originalTables = $db->listTables( $db->_originalTablePrefix, __METHOD__ );
if ( $prefix === 'unprefixed' ) {
- $originalPrefixRegex = '/^' . preg_quote( $db->_originalTablePrefix ) . '/';
+ $originalPrefixRegex = '/^' . preg_quote( $db->_originalTablePrefix, '/' ) . '/';
$originalTables = array_map(
function ( $pt ) use ( $originalPrefixRegex ) {
return preg_replace( $originalPrefixRegex, '', $pt );