小编Pus*_*mar的帖子

我正在 linux 机器上使用 php(7.3) 和 mysql。但是我Fatal error: Uncaught Error: Class 'mysqli' not found in /var/www/html/在 apache2 日志文件 ( /var/log/error.log) 中收到 PHP错误。我检查了几个答案Fatal error: Class 'MySQLi' not found。但没有奏效。

表单处理程序.php

<?php 
$conn = new mysqli("localhost", "root", "root", "Users");
// Check connection
if ($conn->connect_errno) {
   die("Connection failed: " . $conn->connect_error);
}
else
    echo "Connected successfully";
$username = $_POST["username"]; 
$password = $_POST["password"]; 
$query = "SELECT * FROM Users WHERE username = " . $username . " AND password =" . …