PMA\libraries\DbQbe::_getWhereClauseTablesAndColumns PHP Method

    private function _getWhereClauseTablesAndColumns()
    {
        $where_clause_columns = array();
        $where_clause_tables = array();
        // Now we need all tables that we have in the where clause
        for ($column_index = 0, $nb = count($this->_criteria); $column_index < $nb; $column_index++) {
            $current_table = explode('.', $_POST['criteriaColumn'][$column_index]);
            if (empty($current_table[0]) || empty($current_table[1])) {
                continue;
            }
            // end if
            $table = str_replace('`', '', $current_table[0]);
            $column = str_replace('`', '', $current_table[1]);
            $column = $table . '.' . $column;
            // Now we know that our array has the same numbers as $criteria
            // we can check which of our columns has a where clause
            if (!empty($this->_criteria[$column_index])) {
                if (mb_substr($this->_criteria[$column_index], 0, 1) == '=' || stristr($this->_criteria[$column_index], 'is')) {
                    $where_clause_columns[$column] = $column;
                    $where_clause_tables[$table] = $table;
                }
            }
            // end if
        }
        // end for
        return array('where_clause_tables' => $where_clause_tables, 'where_clause_columns' => $where_clause_columns);
    }