Laravel表单文本字段验证特定URL？

Question

I am building some user profiles and want to add social links to the profiles so users can link to their, let's say Steam, YouTube, Google+ profiles.

So i can't find any way of validating against specific url's in laravel. I want a user, if he set a link in steam text field to validate if given url is really url to steampowered.com, or if not to throw an error that url is not valid.

I have read the documentation on validation and i read that there is a URL validation, but as i have read it's only validating agains the input if it's formated as an url. so basically user can post any url and it will be validated.

Is there a filter or some additional condition to URL validation for a specific url. So the input field will be valid only if user insert like: http://steamcommunity.com in the field.

How can someone achieve that, or i must write old php regex expression?

Answer 1

You should definetely write your own custom Validator and use a regexp to verify that:

\Validator::extend('checkUrl', function($attribute, $value, $parameters)
{
    $url = $parameters[0];
    //Your pattern, not pretending to be super precise, so it's up to you
    $pattern = '/^((http|https)\:\/\/)?(www\.)?'.$url.'\..+$/'
    if(  preg_match( $pattern,$value)
    {
        return true;
    }
    return false;
});

And to use it provide it as a rule to your validator

$rules = [
   your_field => 'checkUrl:http://steamcommunity.com'
];