捕获php中无效输入的最快方法

Question

From an HTML document, I am getting two value

$dateStart = $_GET['date_1']; //date starting search
$dateEnd = $_GET['date_2']; //date starting search

Does PHP offer a feature that allows me to check if the input don't match the format dd/mm/yy or must I nest conditions?

Answer 1

Validate your date

if (DateTime::createFromFormat('d/m/y', $date)) {
    echo "Date is valid";
} else {
    echo "Date is not valid";
}

More generally, if you want to validate "stuff"

Use PHP "embedded filters" with filter_var() . Link . You can use it for a lot of "standard" filters or with your regex. In the case of dd/mm/yy dates you can use a custom regex:

$regex = '~^\d{2}/\d{2}/\d{2}$~';
print filter_var("01/01/2017",FILTER_VALIDATE_REGEXP,["options" => ["regexp"=> $regex]]);

Beware, this will validate also 22/22/22 which is not correct, so use the first proposed date validation, I used it only as example ;)