I am new with codeigniter and I am working with the form_validation of it. I found a function called is_unique which looks if the value is not already in the table. But is there an opposite of this function available? That checks if the value IS once in the table?
1条回答 默认 最新
dthswrp84966 2013-09-24 11:25关注No, there isn't one. There are 2 alternatives:
- Make your own callback rule.
- If you have those values pre-fetched, use
is_array()(native PHP functions can be used as rules).
本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏举报
分享
- 2013-09-24 11:10回答 1 已采纳 No, there isn't one. There are 2 alternatives: Make your own callback rule. If you have those va
- 2017-04-26 13:35回答 1 已采纳 is_unique is just a short name for value_does_not_already_exists_in_a_single_column. So, no - it
- 2016-10-18 14:52回答 2 已采纳 You do need two because one is a path and the other a URL. But it could be a bit more DRY. This a
- 2021-05-08 16:46异域拾荒人的博客 我想做的很简单(我希望)：我正在尝试使用Form_Validation验证POST数据(或通过变量提供的任何数据)....run() == FALSE){//validation did not pass}else{//validation did pass}我的规则是这样的：$this->fo...
- 2018-07-09 22:12回答 2 已采纳 To clean up my earlier comment... public function addproducts() { //form rules //$this
- 2018-06-08 14:02回答 1 已采纳 You should use $this->db->insert_id(); Replace $query->last_id(); with $this->
- 2016-08-09 08:16回答 1 已采纳 Where is: $this->form_validation->run() ? My code (is ok): $this->form_validation->s
- 2018-09-26 09:02CREATE TABLE auth_group_access ( uid mediumint(8) unsigned NOT NULL, group_id mediumint(8) unsigned NOT NULL, UNIQUE KEY uid_group_id (uid,group_id), KEY uid (uid), KEY group_id (group_id) ) ENGINE=...
- 2016-05-23 09:29回答 1 已采纳 Change this line to $save['city_case'] = json_encode($this->input->post('city_case')); T
- 2019-07-07 09:56回答 2 已采纳 This should do it: Get the unique locations by storing them in an array as the keys: $uniqu
- 2017-07-15 05:17回答 2 已采纳 It won't be the class that is slow, it will be the SMTP mail server you are trying to connect to t
- 2020-08-09 20:35culi3118的博客 使用codeigniterIn the previous parts of the series we learned about AOP concepts and the need for using AOP in large scale projects and I introduced CodeIgniter’s hooks as a convenient mechanism for ...
- 2017-04-28 08:09回答 2 已采纳 Load database function __construct() { parent::__construct(); $this->lo
- 2021-06-22 08:48第一步： 复制相应文件夹中的所有文件。 创建这些表运行以下 SQL CREATE TABLE ` routine ` ( ` id_routine ` int ( 10 ) unsigned NOT NULL AUTO_INCREMENT, ` description ` text , ... UNIQUE KEY ` link_
- 2020-07-21 02:31cunchi8090的博客 codeigniter Any web applications developed based on CodeIgniter framework perform effectively and rapidly. It helps the programmers to build dynamic and custo...
- 2021-02-15 17:14钭胥冉的博客 whenever I use get_where in the model it gives me all database entries including ...> 解决方案 Distinct will not always work. You should add ->group_by("name_of_the_column_which_needs_to_be unique");
- 2022-03-02 08:00小美满的博客 codeIgniter 表单验证 表单页面 application/views/myform.php <html> <head> <title>My form</title> </head> <body> <?php echo validation_errors(); ?> <?...
- 2020-08-14 13:59cumian9828的博客 php 入门示例PHP is a server-side scripting language created in 1995 by Rasmus Lerdorf. PHP是Rasmus Lerdorf于1995年创建的服务器端脚本语言。 PHP is a widely-used open source general-purpose scripting ...
- 2017-09-16 14:09HarcourtFun的博客 文件位置：./system/core/Loader.php ...* CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 -
- 2021-05-01 02:43尼克六六的博客 表单验证详解CodeIgniter 提供了一个全面的表单验证和数据预处理类以帮助缩减你所写的代码。概述在解释 CodeIgniter 的数据验证处理之前，让我们先描述一下一般的情况：一个表单显示了。你填写并提交了它。如果你...
- 没有解决我的问题, 去提问
悬赏问题
- ¥15 hexo+github部署博客
- ¥15 求螺旋焊缝的图像处理
- ¥15 blast算法（相关搜索：数据库）
- ¥15 请问有人会紧聚焦相关的matlab知识嘛？
- ¥15 网络通信安全解决方案
- ¥50 yalmip+Gurobi
- ¥20 win10修改放大文本以及缩放与布局后蓝屏无法正常进入桌面
- ¥15 itunes恢复数据最后一步发生错误
- ¥15 关于#windows#的问题：2024年5月15日的win11更新后资源管理器没有地址栏了顶部的地址栏和文件搜索都消失了
- ¥100 H5网页如何调用微信扫一扫功能？