PHP升级到4.3版本之后改变了调用存储过程的一个特性
编写者 版本 本文假定您熟悉 Php 、Sql 。 郑昀 @ 掌上灵通 第一稿 小麻烦: 我们按照惯例使用了一个MS Sql Server的存储过程procA,它给出了一个输出参数nReturn, 而且返回了一个结果集。 在如何让PHP调用这个procA的时候,我们遭遇了一点小麻烦。 鱼肉和
编写者 版本 本文假定您熟悉 Php、Sql。 郑昀@掌上灵通 第一稿
小麻烦:
我们按照惯例使用了一个MS Sql Server的存储过程procA,它给出了一个输出参数nReturn,
而且返回了一个结果集。
在如何让PHP调用这个procA的时候,我们遭遇了一点小麻烦。
鱼肉和熊掌不可兼得:
我们本来希望这样的代码能够既得到输出参数,又得到返回的结果集:
// 初始化要传进存储过程的参数们:
$nYear = 2004;
$nPageSize = 20;
$nPageNo = 1;
// Initializes a stored procedure:
$stmt = mssql_init("proc_stat_page", $db_mssql->Link_ID);
// 绑定输入参数:
mssql_bind($stmt, "@nReturn", $nReturn, SQLINT4, TRUE);
mssql_bind($stmt, "@nYear", $nYear, SQLINT4);
mssql_bind($stmt, "@nPageSize", $nPageSize, SQLINT4);
mssql_bind($stmt, "@nPageNo", $nPageNo, SQLINT4);
// 执行存储过程,得到QueryID:
$db_mssql->Query_ID = mssql_execute($stmt,false);
虽然得到了结果集,但是,这样$nReturn参数是拿不到输出参数的。
如果把最后一句话改为:
$db_mssql->Query_ID = mssql_execute($stmt,true);
输出参数倒是拿到了,结果集又没有了。
好像是一个鱼肉和熊掌不可兼得的样子。
难道PHP连这个都做不到?PHP手册中也没有讲这个问题。
来自于PHP维护者的解释:
原本我们这种调用办法是PHP 4.3版本之前肯定是支持的。
“但是,自从PHP 4.3版本之后,”他们说,“为了能够兼容存储过程返回多个结果集,PHP改变这个特性。”
“如果你不需要结果集,你应该设置mssql_execute的第二个可选参数为TRUE,这样mssql_execute方法之后你就可以得到输出参数了。”
“如果你需要返回的结果集们,你应该为每一个结果集调用一次mssql_next_result。在最后一个结果集返回之后,你再调用mssql_next_result就会得到返回值FALSE,这时候,你就可以访问输出参数了。”
解决:
在最后我们补上一句话:
// After the last result has been returned the return value will have the value returned by the stored procedure.
mssql_next_result($db_mssql->Query_ID);
立刻,魔法生效了:
PHP填充了正确的输出参数到$nRetVal里。

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