What are some best practices for handling regular expressions in PHP scripts?

Regular expressions can be powerful tools in PHP scripts, but they can also be complex and error-prone. To handle regular expressions effectively, it's important to use them sparingly and test them thoroughly. Additionally, it's a good practice to use built-in PHP functions like preg_match() or preg_replace() to work with regular expressions. 

// Example of using preg_match() to validate an email address
$email = "john.doe@example.com";

if (preg_match("/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/", $email)) {
    echo "Valid email address";
} else {
    echo "Invalid email address";
}

Keywords

regular expressions PHP scripts preg_match preg_replace error handling

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