What are some best practices for error handling and troubleshooting in PHP when working with MySQL databases?

Issue: When working with MySQL databases in PHP, it is important to handle errors effectively to troubleshoot and resolve issues that may arise during database operations. Best practice for error handling and troubleshooting in PHP when working with MySQL databases: 1. Use try-catch blocks to catch exceptions thrown by MySQL queries. 2. Use the mysqli_error() function to retrieve detailed error messages from MySQL. 3. Log errors to a file or display them in a user-friendly manner to aid troubleshooting. PHP code snippet: 

<?php
// Connect to MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Check connection
if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}

// Perform MySQL query
$query = "SELECT * FROM users";
$result = mysqli_query($connection, $query);

// Handle errors
if (!$result) {
    throw new Exception(mysqli_error($connection));
}

// Process query results
while ($row = mysqli_fetch_assoc($result)) {
    // Process each row
}

// Close connection
mysqli_close($connection);
?>

Keywords

MySQL error handling debugging PDO exceptions

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