What is best way to check if a URL is valid in PHP?

Question

3 and 4 also must be valid, how can I do it using FILTER_VALIDATE_URL? FILTER_VALIDATE_URL not understanding international domains.

1. $url = 'https://example.com'; - Valid
2. $url = 'https://example.com/en/'; - Valid
3. $url = 'https://example.հայ'; - Invalid
4. $url = 'https://example.рус'; - Invalid
5. $url = 'https://exa_mple.com'; - Invalid


if (filter_var($url, FILTER_VALIDATE_URL)) {
   echo("Valid URL!");
} else {
   echo("Invalid URL!");
}

Check this - https://stackoverflow.com/questions/161738/what-is-the-best-regular-expression-to-check-if-a-string-is-a-valid-url — Tuhin, Dec 06 '20 at 18:28

score 0 · Answer 1 · answered Dec 06 '20 at 18:29

0

You can use the IDN function to first convert the IDN to ASCII:

https://www.php.net/manual/en/function.idn-to-ascii.php

answered Dec 06 '20 at 18:29

Evert

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What is best way to check if a URL is valid in PHP?

1 Answers1