What are the potential pitfalls of using certain characters as delimiters in PHP string manipulation functions?

Using certain characters as delimiters in PHP string manipulation functions can lead to unexpected behavior if those characters are present within the string itself. To avoid this issue, it's important to choose a delimiter that is unlikely to appear in the string being manipulated. One common approach is to use a non-alphanumeric character, such as a pipe "|" or a tilde "~", as the delimiter.

// Example of using a pipe "|" as the delimiter to avoid issues with characters in the string
$string = "Hello|World|PHP";
$parts = explode("|", $string);
print_r($parts);