What are some common pitfalls to be aware of when installing PHP scripts that require a database on a web server?

One common pitfall when installing PHP scripts that require a database on a web server is not properly configuring the database connection settings in the script. Make sure to double-check the host, username, password, and database name in the script to ensure they match the settings of your database server. Additionally, be cautious of SQL injection vulnerabilities by using prepared statements or parameterized queries to prevent malicious attacks on your database. 

// Example of properly configuring a database connection in PHP
$host = "localhost";
$username = "root";
$password = "password";
$database = "my_database";

$conn = new mysqli($host, $username, $password, $database);

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

Keywords

SQL injection database connection PDO error handling file permissions

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