What are the potential pitfalls of using the date() function in PHP for date validation?

The date() function in PHP can be a pitfall for date validation because it does not actually validate the date. It simply formats a given timestamp into a specified format. To properly validate a date, you should use functions like strtotime() or DateTime::createFromFormat() to check if the date is valid. 

$date = "2022-13-32"; // Invalid date
$timestamp = strtotime($date);

if ($timestamp === false) {
    echo "Invalid date";
} else {
    echo "Valid date";
}

Keywords

date function date validation PHP potential pitfalls error types

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