How do you use regular expressions in PHP

Keywords: PHP, Regular Expressions, preg_match, preg_replace

Description: This section explains how to use regular expressions in PHP, providing examples of common functions used in string manipulation.


        <?php
            $pattern = "/\d+/"; // This regex matches one or more digits
            $string = "There are 123 apples.";
            
            if (preg_match($pattern, $string, $matches)) {
                echo "Found a number: " . $matches[0];
            } else {
                echo "No numbers found.";
            }
        ?>