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第七课—类与对象 2018年8月29日
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  1. 类是对象的模板,对象是类的实例

  2. MySQL curd

    2.png

    3.连接数据库

    

实例

<!-- confing -->
<?php
$db = [
   'host' => '127.0.0.1',
   // 用户名
   'user' => 'root',
   // 密码
   'pass' => '',
   // 数据库名称
   'name' => 'test',
   // 字符集
   'charset' => 'utf8',
];

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实例

<?php

// 导入数据库配置文件
require 'confing.php';
// 关闭警告
error_reporting(E_ALL ^E_WARNING);
// 创建数据库连接
$sql = new mysqli($db['host'], $db['user'], $db['pass'], $db['name']);
// 判断是否连接成功
if ($sql -> connect_errno) {
	//自定义提示信息
	die('连接错误'.$sql -> connect_errno.$sql -> connect_error);
}
echo '<h2>数据库连接成功</h2>';
// 设置数据库字符集
$sql -> set_charset($db['charset']);

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3.png

手写

IMG_20180831_100018.jpg


总结:

    1.MySQL插入数据 insert table_name ( field1, field2,...fieldN ) values ( value1, value2,...valueN );

    2.MySQL查询数据 select * from table_name where  id=num

    3.MySQL更新数据 update table_name set field1=new_value1,field2=new_value2,fieldN=new_valueN where id=num

    4.MySQL删除数据 delete from table_name where id=num

    5.数据库连接 new mysqli($db['host'], $db['user'], $db['pass'], $db['name']);

    6.判断是否连接成功使用 connect_errno 属性

Correction status:qualified

Teacher's comments:
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