In the context of PHP, what is the significance of using \s instead of a space when specifying white space in regular expressions?

Using \s instead of a space in regular expressions in PHP allows for matching any white space character, not just a literal space. This is useful when you want to match spaces, tabs, line breaks, or other types of white space. By using \s, your regular expression becomes more versatile and can handle different types of white space characters.

// Example: Using \s to match any white space character
$string = "Hello world";
if (preg_match("/Hello\sworld/", $string)) {
    echo "Match found!";
} else {
    echo "No match found.";
}