What are potential pitfalls of using chunk_split and str_replace functions together in PHP?

When using chunk_split and str_replace functions together in PHP, a potential pitfall is that the str_replace function may replace characters within the chunks created by chunk_split, leading to unexpected results. To avoid this issue, it is recommended to perform the str_replace function before using chunk_split.

// Perform str_replace before using chunk_split
$string = "Hello World";
$replaced_string = str_replace("o", "0", $string);
$chunked_string = chunk_split($replaced_string, 2);
echo $chunked_string;