在CodeIgniter中,可以使用嵌套的where条件来构建复杂的查询语句。嵌套的where条件允许我们在查询中使用多个where子句,并通过逻辑运算符(如AND和OR)将它们组合起来。 以下是使用CodeIgniter的嵌套where条件的示例代码: 代码语言:txt 复制 $this->db->select('*'); $this->db->from('my_table'); $this->db->wher...
在where子句中,我们可以使用and和or来组合多个条件。例如: 代码语言:php 复制 $this->db->select('*'); $this->db->from('table1'); $this->db->join('table2', 'table1.id = table2.id'); $this->db->where('table1.name', 'John'); $this->db->or_where('table1.age', 30); $...
If you aren't familiar with the process of setting up a web server, it's easier to install a package such as XAMPP Lite or WAMP. It installs Apache, PHP, and MySQL on to a Windows machine with minimum configuration to be done by you. XAMPP Lite is free, it comes with comprehensive...
<?php$query->getUnbufferedRow();// object$query->getUnbufferedRow('object');// object$query->getUnbufferedRow('array');// associative array Custom Result Objects You can have the results returned as an instance of a custom class instead of astdClassor array, as thegetResult()andget...
Generates an update string based on the data you supply, and runs the query. You can either pass an array or an object to the function. Here is an example using an array: 删除数据 $this->db->delete(); 生成并执行一条DELETE(删除)语句。
CRUD 是Create, Retrieve, Update, and Delete的缩写. 这些是最基本的数据源交互方法。 如: Create[增] – 添加一个用户账号 Retrieve[查] – 获取一个产品列表 Update[改] – 修改用户密码或产品名称 Delete[删] – 删除一个用户或产品 编写model时,一般首先会创建CRUD方法。如果你正在编写用户身份验证(登陆...
That typically is TRUE/FALSE on success or failure for write type queries such as INSERT, DELETE or UPDATE statements (which is what it really should be used for) and a resource/object on success for queries with fetchable results.if ($this->db->simple_query('YOUR QUERY')) { echo "...
CodeIgniter gives you access to a Query Builder class. This pattern allows information to be retrieved, inserted, and updated in your database with minimal scripting. In some cases, only one or two lines of code are necessary to perform a database action. CodeIgniter does not require that eac...
$this->query_string_segment.'='; } else { $this->base_url = rtrim($this->base_url, '/') .'/'; } // And here we go... $output = ''; // Render the "First" link if ($this->first_link !== FALSE AND $this->cur_page > ($this->num_links + 1)) { $first_url = ...
The first parameter is (1) the name of the class and method (Simple Cell) or (2) the name of the class and optional method (Controlled Cell) to call, and the second parameter is an array or string of parameters to pass to the method:// In a View. // Simple Cell <?= view_...