从 PHP7.4 迁移到 PHP8.0 后数据库连接不工作

Question

也许你能帮我。我尝试从 php7.4 迁移到 php8.0，但我的数据库连接没有正常工作。使用 php7.4 它适用于 php8.0 它不适用。

数据库连接将不再以这种方式建立。

你知道为什么吗？

连接代码：

$db = new sql_db($dbhost, $dbuser, $dbpasswd, $dbname, false);
if(!$db->db_connect_id)
{
    message_die(CRITICAL_ERROR, "Could not connect to the database");
}

背后的功能：

function sql_db($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
        {
            $this->persistency = (version_compare(PHP_VERSION, '5.3.0', '>=')) ? $persistency : false;
            $this->user = $sqluser;
            
            $this->password = $sqlpassword;
            $this->server = ($this->persistency) ? 'p:' . (($sqlserver) ? $sqlserver : 'localhost') : $sqlserver;
            
            $this->dbname = $database;
            $port = (!$port) ? NULL : $port;

            $this->db_connect_id = @mysqli_connect($this->server, $this->user, $this->password, $this->dbname, $port);
            
            if( $this->db_connect_id && $database != '')
            {
                @mysqli_query($this->db_connect_id, "SET NAMES 'ISO-8859-1'");
                
                $this->dbname = $database;
                $dbselect = @mysqli_select_db($this->db_connect_id, $this->dbname);

                if( $dbselect === false )
                {
                    @mysqli_close($this->db_connect_id);
                    $this->db_connect_id = $dbselect;
                }


                return $this->db_connect_id;
            }
            else
            {
                return false;
            }
        }

Answer 1

看起来您一直在依赖古老的、长期弃用的行为，即与 class 同名的方法充当构造函数。这个行为终于被thrown out in PHP 8:

Methods with the same name as the class are no longer interpreted as constructors. The __construct() method should be used instead.

从 PHP7.4 迁移到 PHP8.0 后数据库连接不工作

Database Connection not working after migrating from PHP7.4 to PHP8.0

php

database

mysqli

connect