Definition and Usage
定义和用法
The mysql_affected_rows() function returns the number of affected rows in the previous MySQL operation.
mysql_affected_rows()函数的作用是:取得前一次 MySQL 操作所影响的记录行数。
This function returns the number of affected rows on success, or -1 if the last operation failed.
如果该函数成功执行,将返回记录行数;如果失败,将返回“-1”。
Syntax
语法
connection
Optional. Specifies the MySQL connection. If not specified, the last connection opened by mysql_connect() or mysql_pconnect() is used.
可选参数。指定MySQL连接。如果未指定该参数,那将默认使用mysql_connect()函数 或 mysql_pconnect()函数建立连接
<?php
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con) { die("Could not connect: " . mysql_error()); }
mysql_select_db("mydb");
mysql_query("DELETE FROM mytable WHERE id < 5");
$rc = mysql_affected_rows();echo "Records deleted: " . $rc;
mysql_close($con);?>
The output of the code above could be:
上述代码将输出下面的结果:
Records deleted: 4
--转自