Are there any best practices or recommended resources for handling string manipulation tasks in PHP?

When handling string manipulation tasks in PHP, it is recommended to use built-in functions such as `strlen()`, `substr()`, `str_replace()`, `strtolower()`, `strtoupper()`, `trim()`, `explode()`, `implode()`, etc. These functions can help you manipulate strings efficiently and effectively. It is also advisable to sanitize user input to prevent security vulnerabilities.

// Example: Manipulating a string in PHP
$string = "Hello, World!";
$lowercaseString = strtolower($string);
$uppercaseString = strtoupper($string);

echo "Original String: " . $string . "\n";
echo "Lowercase String: " . $lowercaseString . "\n";
echo "Uppercase String: " . $uppercaseString . "\n";