以往的ThinkPHP3.0版本对数组方式的查询条件会进行安全过滤(这是由于3.0强制使用了字段类型检测,所以数组方式的查询条件会强制转换为字段的设定类型),但是3.0版本并不支持字符串条件的安全过滤。而ThinkPHP3.1版本则增加了对条件字符串进行预处理的支持,让ORM的安全性更加得以保证。
一、使用where方法
Model类的where方法支持字符串条件预处理,使用方式: $Model->where("id=%d and username='%s' and xx='%f'",array($id,$username,$xx))->select();
或者直接使用:
$Model->where("id=%d and username='%s' and xx='%f'",$id,$username,$xx)->select();
如果$id变量来自用户提交或者URL地址的话,如果传入的是非数字类型,则会强制格式化为数字格式后进行查询操作。
字符串预处理格式类型支持指定数字、字符串等,具体可以参考vsprintf方法的参数说明。
二、使用query和execute方法
除了where条件外,对原生SQL查询方式也支持预处理机制,例如:
$Model->query("SELECT * FROM think_user WHERE id=%d and username='%s' and xx='%f'",array($id,$username,$xx));
模型的execute方法也和query方法一样支持预处理机制。

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Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.


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