Are there any best practices for using regular expressions in PHP functions like preg_match()?

When using regular expressions in PHP functions like preg_match(), it is important to follow best practices to ensure efficient and effective pattern matching. Some best practices include using delimiters correctly, escaping special characters, and optimizing the regular expression pattern for performance.

// Example of using preg_match() with best practices
$string = "Hello, World!";
$pattern = "/Hello/";

if (preg_match($pattern, $string)) {
    echo "Pattern found in string.";
} else {
    echo "Pattern not found in string.";
}