What best practices should be followed when troubleshooting PHP-related issues with a newsletter system?

Issue: When troubleshooting PHP-related issues with a newsletter system, it is important to check for errors in the code, ensure that all necessary files are included correctly, and verify that the PHP version is compatible with the system. Code snippet: 

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Include necessary files
require_once 'config.php';
require_once 'functions.php';

// Check PHP version compatibility
if (version_compare(PHP_VERSION, '7.0.0') < 0) {
    die('PHP version must be 7.0.0 or higher');
}

// Rest of the PHP code for the newsletter system
?>

Keywords

PHP debugging error logs SMTP mail delivery

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