PHP防止表单重复提交的几种常用方法汇总
这篇文章主要介绍了PHP防止表单重复提交的几种常用方法汇总,在PHP项目开发中有不错的实用价值,需要的朋友可以参考下
本文较为详细的汇总了PHP防止表单重复提交的几种常用方法,在PHP程序开发中有着很高的实用价值。具体方法如下:
1. 使用JS让按钮在点击一次后禁用(disable)。采用这种方法可以防止多次点击的发生,实现方式较简单。
缺点是若客户端禁止JavaScript脚本,,则失效。
2. 在提交成功后执行页面重定向(redirect)。转到提交成功信息页面。
特点:避免F5重复提交,消除浏览器前进和后退按钮可导致的同样问题。
3. 表单隐藏域中存放session(表单被请求时生成的标记)。采用此方法在接收表单数据后,检查此标志值是否存在,先进行删除,然后处理数据; 若不存在,说明已提交过,忽略本次提交。
/* //服务端生成随机数存入session, 分配至表单页 $data['sess_id'] = $_SESSION['sid'] = mt_rand(1000, 9999); $this->load->view('form', $data); //表单页隐藏域存放此session值 //处理 if($_POST['sid'] != '' && $_POST['sid'] == $_SESSION['sid']) { unset($_SESSION['sid']); echo '处理数据'; } else { echo '已提交过表单'; }
4. 数据库唯一索引约束(最有效的防止重复数据的方法)。
希望本文所述方法对大家的PHP项目开发能起到一定的帮助作用。

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