What are some best practices for debugging PHP code that involves database interactions?

When debugging PHP code that involves database interactions, it is important to first check for any syntax errors in your SQL queries or PHP code. You can also use functions like `mysqli_error()` to get more information about any database errors that may be occurring. Additionally, enabling error reporting and logging can help identify issues with database connections or queries. 

// Example code snippet for debugging PHP code with database interactions

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Connect to the database
$mysqli = new mysqli('localhost', 'username', 'password', 'database');

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

// Example SQL query
$sql = "SELECT * FROM users WHERE id = 1";

// Execute the query
$result = $mysqli->query($sql);

// Check for query errors
if (!$result) {
    die('Error executing query: ' . $mysqli->error);
}

// Fetch data from the result set
while ($row = $result->fetch_assoc()) {
    // Process data here
}

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

Keywords

SQL injection PDO error handling var_dump query optimization

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