What suggestions were provided by other forum users to improve the PHP code snippet provided?

The issue with the provided PHP code snippet is that it is using the deprecated `mysql_` functions, which are no longer supported in newer versions of PHP. To solve this issue, the code should be updated to use `mysqli_` or PDO functions for database connectivity. Here is an updated PHP code snippet that uses `mysqli_` functions for database connectivity: 

<?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";

// Close connection
$conn->close();
?>

Keywords

syntax error variable naming code indentation function declaration error handling

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