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HomeBackend DevelopmentPHP TutorialThinkPHP3.1新特性之查询条件预处理简介_php实例

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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