php 关于mysqli 扩展

1、创建一张mysql的新表以供测试使用

CREATE TABLE IF NOT EXISTS `user`(
    id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT COMMENT "用户ID",
    name VARCHAR(30) NOT NULL DEFAULT '' COMMENT "用户名",
    password CHAR(30) NOT NULL COMMENT "密码",
    email VARCHAR(100) NOT NULL UNIQUE DEFAULT '' COMMENT "邮箱",
    birthday DATE NOT NULL DEFAULT '2000-1-1' COMMENT "出生日期",
    age TINYINT UNSIGNED NOT NULL COMMENT "年龄"
)CHARSET=utf8 ENGINE=INNODB;