Laravel：检查电子邮件服务提供商域及其子域

Question

I wants restrict user to not to add some popular email service provider domain like gmail.com, yahoo.com, ymail.com, hotmail.com

for that I have created an array

$invalidDomain = ['gmail.com', 'yahoo.com', 'ymail.com', 'hotmail.com']

and then check user input with in_array

if(in_array($insertDomain, $invalidDomain)){
 //restrict
}

but now I also want to check for gmail.co.in, hotmail.co.uk

how can I?

Answer 1

You can use regular expressions to achieve this - it will give you more flexibility eg: if you would like to exclude gmail.co.uk but allow gmail.com. See the code snippet below:

$insertDomain = "gmail.com";
$invalidDomain = ['gmail\.[a-zA-Z\.]{2,}', 'yahoo\.[a-zA-Z\.]{2,}', 'ymail\.[a-zA-Z\.]{2,}', 'hotmail\.[a-zA-Z\.]{2,}'];

// join regexp
if (preg_match('/^'.implode("$|^", $invalidDomain).'$/', $insertDomain)) {
    // restrict
    echo $insertDomain."
";
}