src/Query/Builder.php
public function orWhere($field, $operator = null, $value = null)
    {
        return $this->where($field, $operator, $value, '||');
    }
public function orWhere($field, $operator = null, $value = null)
    {
        return $this->where($field, $operator, $value, '||');
    }
Add an "or where" clause to the query.

@param  string  $field
@param  string  $operator
@param  mixed   $value
@return $this