How can regular expressions (preg_match) be used to achieve the desired result in PHP?

To achieve the desired result using regular expressions in PHP, you can use the preg_match function to search a string for a specific pattern. This can be useful for validating input, extracting specific data, or manipulating strings based on certain criteria. Example PHP code: 

$pattern = '/^[a-zA-Z0-9_]+$/'; // Define the regular expression pattern
$input = "Hello123"; // Input string to match against the pattern

if (preg_match($pattern, $input)) {
    echo "Input matches the pattern!";
} else {
    echo "Input does not match the pattern.";
}

Keywords

regular expressions preg_match PHP pattern matching string manipulation

Related Questions