Laravel validate url name and protocol - php

Question

I need validate url. I need allow only main url sites, example:
http://example.com
https://example.com
I need prevent these urls on my site:
http://example.com/page/blahblahblah
https://example.com/other/bloa
I use regex:
'url' => ['required', 'url', 'regex:/((http:|https:)\/\/)[^\/]+/']
When user insert url, he can insert http://example.com/page/blahblahblah why? My regex is not working.. Validation is passing

Answer 1

You can use the following pattern to ensure a URL does not contain subdirectories:
^(?:\S+:\/\/)?[^\/]+\/?$
Explanation:
^ asserts position at start of the string
Non-capturing group (?:\S+://)?
? Quantifier — Matches between zero and one times, as many times as possible, giving back as needed (greedy)
\S+ matches any non-whitespace character (equal to [^\r\n\t\f\v ])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
: matches the character : literally (case sensitive)
/ matches the character / literally (case sensitive)
/ matches the character / literally (case sensitive)
Match a single character not present in the list below [^/]+
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
/ matches the character / literally (case sensitive)
/? matches the character / literally (case sensitive)
? Quantifier — Matches between zero and one times, as many times as possible, giving back as needed (greedy)
$ asserts position at the end of the string, or before the line terminator right at the end of the string (if any)

Answer 2

You could write a custom validator and use a combination of filter_var and parse_url?
Something as follows will do the job...
<?php
$url = "http://example.com/page/blahblahblah";
if (!filter_var($url, FILTER_VALIDATE_URL)) {
return false;
}
$parts = parse_url($url);
echo "{$parts['scheme']}://{$parts['host']}";