偶然关注数据库安全有关问题，如下
偶然关注数据库安全问题，如下
一张表 id字段为主键 自增
如果要删除某条数据
那么
"delete from test where id=".$_POST['id']
问题就是有没有可能这样是不安全的
"delete from test where id=".$_POST['id']
$_POST['id'] = 2 or 1=1 之类的情况
会产生这种情况吗，导致全部删除
------解决方案--------------------
有啊，所以一般对数值类型也加引号
"delete from test where id='$_POST[id]'"
------解决方案--------------------
有可能。这就是常常说的防sql注入。转义特殊字符。
------解决方案--------------------
加引号后只要有转义处理就无可能
------解决方案--------------------
intval
------解决方案--------------------
方法一:在php.ini中设置:magic_quotes_gpc = Off
方法二: $str=stripcslashes($str)
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