动态多逻辑关系多条件查询的php语句
各位大侠好!我正在做一个多逻辑关系的多条件查询系统,逻辑关系有与、或、非三种,用下拉列表供用户选择。我在页面中添加了两个按钮,点增加按钮,会自动添加一行可供选择的查询条件(这个是用js实现的),具体有三个:逻辑关系的下拉别表(name为logic),搜索项(例如:学号、姓名、籍贯等,name为searchitem)、input文本框(name为keyword)给用户输入关键词。点删除按钮,就会删掉刚才添加的条件行。我的问题是,这些动态生成的下拉列表和文本框的值怎么传给php文件?然后根据用户选择的逻辑关系(可能有多个)、搜索项和关键词生成sql查询语句?万分感谢!
------解决方案--------------------
这逻辑关系写起来挺复杂的,对我来说太难了。
我给的代码仅仅是语法上的参考。思路你自己整理
- PHP code
$sql = "SELECT * FROM student"; if ( ! empty($_GET['学号']) ) // 如果用户填写了学号选项 $where .= " `学号` = {$_GET['学号']} "; if ( ! empty($_GET['姓名'])){ // 如果是 或 关系 $where .= ( !($_GET['and'] == '0') ) ? ' OR ' : ' AND '; $where .= " `姓名` = {$_GET['姓名']} "; } $query = $sql .' '. $where; <div class="clear"> </div>

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