What are some common pitfalls for PHP beginners when trying to integrate scripts into different platforms?

One common pitfall for PHP beginners when trying to integrate scripts into different platforms is not considering the differences in server configurations and PHP versions. To solve this issue, it's important to write code that is compatible with different environments by using standard PHP functions and avoiding deprecated features.

// Example of using standard PHP functions to ensure compatibility with different platforms
if (function_exists('mysqli_connect')) {
    // Code using mysqli functions
} else {
    // Code using mysql functions (deprecated in PHP 7)
}