What are some best practices for handling errors and debugging when encountering issues with PHP code, such as incorrect query results?

When encountering issues with incorrect query results in PHP code, one best practice is to use error handling techniques such as try-catch blocks to catch and handle any exceptions that may occur. Additionally, debugging tools like var_dump() or print_r() can be used to inspect variables and data structures to identify the root cause of the issue. Finally, reviewing the SQL query being executed and ensuring it is accurate and properly formatted can help to resolve incorrect query result problems. 

try {
    // Your code that executes the SQL query
    $result = $pdo->query("SELECT * FROM table_name");
    
    // Check if the query was successful
    if ($result) {
        // Process the query result
        foreach ($result as $row) {
            // Do something with each row
        }
    } else {
        // Handle the case where the query failed
        throw new Exception("Error executing SQL query");
    }
} catch (Exception $e) {
    // Handle any exceptions that occurred during query execution
    echo "Error: " . $e->getMessage();
}

Keywords

try-catch error_reporting debugging var_dump exception handling

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