/**
* 用于获取最后插入的ID
* @access public
* @return integer
*/
public function last_insert_id() {
$query = "SELECT LASTVAL() AS insert_id";
$result = pg_query($this->_linkID,$query);
$arr = pg_fetch_array($result,null,PGSQL_ASSOC);
//list($last_insert_id) = pg_fetch_array($result,null,PGSQL_ASSOC);
pg_free_result($result);
// return $last_insert_id;
return $arr['insert_id'];
}注释部分 list($last_insert_id) = pg_fetch_array($result,null,PGSQL_ASSOC); 函数pg_fetch_array 返回的是关联数组 ，用list给变量赋值时返回null 最佳答案
