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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”。
mysql_affected_rows(connection) |
Parameter 参数 | Description 描述 |
---|---|
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 |