if ( $cond ) {
$this->addWhere( $cond );
$multiNS = count( $lb->data ) !== 1;
- $multiTitle = count( call_user_func_array( 'array_merge', $lb->data ) ) !== 1;
+ $multiTitle = count( array_merge( ...$lb->data ) ) !== 1;
} else {
// No titles so no results
return;