What potential pitfalls can arise when using multiple string manipulation functions in PHP?

When using multiple string manipulation functions in PHP, potential pitfalls can arise due to the order in which the functions are applied. It's important to carefully consider the sequence of operations to avoid unintended results or errors. One way to address this issue is to break down the string manipulation into separate steps, with each step clearly defined and executed in a logical order.

$string = "Hello, World!";
// Step 1: Convert string to lowercase
$string = strtolower($string);
// Step 2: Remove any punctuation
$string = preg_replace("/[[:punct:]]/", "", $string);
// Step 3: Reverse the string
$string = strrev($string);

echo $string; // Output: dlrowolleh