What are some common reasons for the MySQL server to actively refuse connections in PHP applications?

Common reasons for the MySQL server to actively refuse connections in PHP applications include incorrect credentials, server misconfiguration, firewall blocking the connection, or the server being overloaded with requests. To solve this issue, ensure that the database credentials in your PHP code are correct, check the MySQL server configuration for any errors, make sure the firewall allows connections to the MySQL server, and optimize the server to handle the incoming requests efficiently. 

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

echo "Connected successfully";
$conn->close();
?>

Keywords

MySQL server connection refusal PHP applications error handling troubleshooting

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