What are some best practices for error handling in PHP, especially when working with MySQL queries?

When working with MySQL queries in PHP, it is important to handle errors properly to ensure the stability and security of your application. One best practice is to use try-catch blocks to catch any exceptions thrown by the database connection or query execution. Additionally, you should utilize error reporting functions like mysqli_error() to retrieve detailed error messages for debugging purposes. 

// Establish a connection to the MySQL database
$mysqli = new mysqli("localhost", "username", "password", "database");

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

// Perform a query
$query = "SELECT * FROM table";
$result = $mysqli->query($query);

// Check for query execution errors
if (!$result) {
    die("Query failed: " . $mysqli->error);
}

// Process the query results
while ($row = $result->fetch_assoc()) {
    // Do something with the data
}

// Close the database connection
$mysqli->close();

Keywords

try-catch PDO mysqli error_reporting exceptions

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