What resources or RFCs can be referenced to ensure accurate and comprehensive email validation in PHP?

Email validation in PHP can be done using regular expressions to ensure that the email address provided adheres to the standard format. To ensure accurate and comprehensive email validation, it is recommended to refer to RFC 5322 which defines the syntax for email addresses. Additionally, RFC 5321 outlines the rules for email transmission and delivery. 

$email = "example@example.com";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Email address is valid.";
} else {
    echo "Email address is not valid.";
}

Keywords

email validation RFC PHP regular expressions validation libraries

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