<?php class UserInfo { public $name = ""; public $age = 0; public $blog = ""; public function __construct($name, $age, $blog) { $this->name = $name; $this->age = (int)$age; $this->blog = $blog; } function get($url) { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $output = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); if($httpCode == 404) { return 404; } curl_close($ch); return $output; } public function getBlogContents () { return $this->get($this->blog); } public function isValidBlog () { $blog = $this->blog; return preg_match("/^(((http(s?))\:\/\/)?)([0-9a-zA-Z\-]+\.)+[a-zA-Z]{2,6}(\:[0-9]+)?(\/\S*)?$/i", $blog); } }什么意思

这是一个 PHP 类的定义，名为 UserInfo。该类有三个公共属性：$name，$age，$blog，分别表示用户的姓名、年龄和博客链接。该类还有一个构造函数，用于初始化这三个属性的值。此外，该类还有两个公共方法：getBlogContents() 和 isValidBlog()。getBlogContents() 方法用于获取用户博客的内容，它通过调用 get() 方法实现。isValidBlog() 方法用于验证用户提供的博客链接是否合法，它使用正则表达式进行判断。如果博客链接符合标准格式，则返回 true，否则返回 false。

相关问题

<?php $password = '1234567'; $salt = '84870' $password = sha1($pwd.$userinfo['salt'].config('pwd_str')) var_dump($password); ?>

There is a syntax error in the code. It should be:

<?php
$password = '1234567';
$salt = '84870';
$password = sha1($password.$salt.config('pwd_str'));
var_dump($password);
?>

The `sha1()` function is used to hash the password concatenated with the salt and a configuration string. The result is then assigned to the `$password` variable and printed using the `var_dump()` function.

使用user = userInfoMapper.selectOne(user);可以正常查到收，可是使用user = userInfoMapper.selectByPrimaryKey(userId);却报错，Creating a new SqlSession SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2213b08a] was not registered for synchronization because synchronization is not active JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@636b6be4] will not be managed by Spring ==> Preparing: SELECT id,session_key,nickname,role,avatar_url,gender,country,province,city,phone_number,create_time,update_time FROM user WHERE id = ? AND session_key = ? AND nickname = ? AND role = ? AND avatar_url = ? AND gender = ? AND country = ? AND province = ? AND city = ? AND phone_number = ? AND create_time = ? AND update_time = ? ==> Parameters: oFBP54qpN074mehPS6CAlMoFzMhA(String), null, null, null, null, null, null, null, null, null, null, null，请详细说明原因

这个错误是因为在使用`userInfoMapper.selectByPrimaryKey(userId)`方法时，MyBatis框架默认使用了事务管理，但是Spring容器没有开启事务。因此，MyBatis无法将JDBC连接注册到Spring的事务管理中，导致报错。

解决方法可以有两种：

1. 在`userInfoMapper.selectByPrimaryKey(userId)`方法上添加`@Transactional`注解，让MyBatis框架使用Spring的事务管理。

@Transactional
public UserInfo selectByPrimaryKey(Integer userId) {
    return userInfoMapper.selectByPrimaryKey(userId);
}

2. 在Spring的配置文件中开启事务管理，这样就可以避免在每个方法上都添加`@Transactional`注解。

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>