mysql_affected_rows没有指定resouce时没有返回值？

[liujianliang]

$rs=mysql_query($sql);
mysql_affected_rows($rs)
如果没有指定$rs时有返回值，但指定$rs后反而没有
这是什么原因？

[liujianliang]

$rs=mysql_query($sql,$conn); mysql_affected_rows($rs) 指定$conn也不行

[ACMAIN_CHM]

为什么不先查一下免费的MYSQL手册中的说明？ int mysql_affected_rows(resource link_identifier); 手册中关于 resource link_identifier 的解释是什么？ 是connection 而不是 rs

[bbjbepzz]

把mysql_affected_rows()的$rs去掉

[ACMAIN_CHM]

20.10.1.4.1. mysql_affected_rows Copyright 1997-2008 the PHP Documentation Group. mysql_affected_rows Get number of affected rows in previous MySQL operation Description int mysql_affected_rows(resource link_identifier); Get the number of affected rows by the last INSERT, UPDATE, REPLACE or DELETE query associated with link_identifier. Parameters link_identifier The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect is assumed. If no such link is found, it will try to create one as if mysql_connect was called with no arguments. If no connection is found or established, an E_WARNING level error is generated. Return Values Returns the number of affected rows on success, and -1 if the last query failed.

[liujianliang]

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