What are some best practices for debugging PHP code when changes in functionality occur after updating PHP versions?

When changes in functionality occur after updating PHP versions, it is essential to thoroughly debug the code to identify the root cause of the issue. Some best practices for debugging PHP code include checking for deprecated functions, reviewing error logs, using a debugger tool, and testing the code on different PHP versions. 

// Example code snippet for debugging PHP code after updating versions
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Check for deprecated functions or features
if (function_exists('deprecated_function')) {
    trigger_error('This function is deprecated', E_USER_DEPRECATED);
}

// Review error logs for any warnings or errors
$logFile = '/path/to/error.log';
ini_set('error_log', $logFile);
error_log('An error occurred: debug this!');

// Use a debugger tool like Xdebug to step through the code
// Ensure the code works on different PHP versions for compatibility

Keywords

PHP debugging code changes version updates functionality

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