src/Phossa/Query/Clause/OnTrait.php
protected function buildOn()/*# : array */
    {
        $result = [];
        foreach ($this->clause_on as $on) {
            $res = [ $on[0] ? 'OR' : 'ON'];
            $res[] = $this->quote($on[1]); // first col
            $res[] = $on[2]; // operator
            $res[] = $this->quote($on[3]); // second col
            $result[] = join(' ', $res);
        }
        return $result;
    }
protected function buildOn()/*# : array */
    {
        $result = [];
        foreach ($this->clause_on as $on) {
            $res = [ $on[0] ? 'OR' : 'ON'];
            $res[] = $this->quote($on[1]); // first col
            $res[] = $on[2]; // operator
            $res[] = $this->quote($on[3]); // second col
            $result[] = join(' ', $res);
        }
        return $result;
    }
Build ON

@return array
@access protected