PHP, validate user submitted URL with particular domain

Question

I'm trying to validate a URL using a Regex with PHP. I need a pattern that considers valid:

a well formed URL;
http://www.domain.PF (this PF is very imporant, no other extension is valid);
https://www.domain.PF
ftp://...;
domain.PF;
www.domain.PF;

Any other is not valid, so you can't have ssh://, a .com domain, etc.

I tried the following pattern:

/(((http|ftp|https):\/{2})+(([0-9a-z_-]+\.)+(pf)(:[0-9]+)?((\/([~0-9a-zA-Z\#\+\%@\.\/_-]+))?(\?[0-9a-zA-Z\+\%@\/&\[\];=_-]+)?)?))\b/imuS

but I've lost many hours (and hairs) trying to make it work the way I need it to work.

Any suggestion is appreciated.

Use php.net/parse_url, it tells many information about an url, including scheme, host.. — Andrew
– Andrew, Commented Feb 24, 2014 at 9:14

xdazz · Accepted Answer · 2014-02-24 09:15:12Z

2

There is parse_url function in php.

Then it will be much easier to validate the scheme and host of the result of parse_url.

answered Feb 24, 2014 at 9:15

xdazz

161k38 gold badges255 silver badges278 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

user1094081 Over a year ago

Problem is it failed in some cases: I tried it but it isn't perfect

xdazz Over a year ago

@3000 It failed means that is not a well formed URL.

user1094081 Over a year ago

it means that parse_url is not perfect: it doesn't work if the protocol is not specified. The user can submit domain.pf too.

Mobin Skariya · Accepted Answer · 2014-02-24 09:34:54Z

1

Try this

/((https?|ftp):\/\/.)?(www\.)?[a-zA-Z0-9]+(\.[a-zA-Z0-9]+)*\.pf/i

I am not sure whether this is the best solution.

answered Feb 24, 2014 at 9:34

Mobin Skariya

3923 silver badges12 bronze badges

2 Comments

Mobin Skariya Over a year ago

which url did this expression fail? Can u please share? If you want to match _ and -. you may add it to character class.

user1094081 Over a year ago

My suspect is JS and PHP regexp aren't the same: maybe this works with JavaScript.

kguest · Accepted Answer · 2014-02-24 13:47:04Z

0

This is a better way of doing what you want, granted it doesn't use regular expressions, but it is easier to maintain and uses native php functions for that reason:

<?php
function isValidPFurl($url) {
    if (strpos($url, "://" ) === false) {
        $url = 'http://' . $url;
    }
    $valid = filter_var($url, FILTER_VALIDATE_URL);
    if ($valid !== false) {
        $parsed = parse_url($valid);
        $host = $parsed['host'];
        $scheme = $parsed['scheme'];
        $valid = false;
        switch($scheme) {
            case 'ftp':
            case 'http':
            case 'https':
                $p = explode(".", $host);
                if ($p[sizeof($p) - 1] == 'pf') {
                    $valid = true;
                }
                break;
            default:
                $valid = false;
        }
    }
    return $valid;
}

$testUrls = array(
"http://example.pf/",
"example.pf",
"www.example.pf",
"ftp://example.pf",
"https://example.pf",
"ssl://example.pf"
);
foreach ($testUrls as $url) {
    echo "is $url valid? ", (int) isValidPFurl($url), "\n";
}

edited Feb 24, 2014 at 13:47

answered Feb 24, 2014 at 9:38

kguest

3,8713 gold badges31 silver badges32 bronze badges

3 Comments

user1094081 Over a year ago

This doesn't solve the problem for www.domain.pf and domain.pf (they return 0), while it is ok for http://...

kguest Over a year ago

I've fixed that now - if no scheme/protocol is in the url, it'll prepend "http://" for parse_url

user1094081 Over a year ago

Hehe, I can't explain why but this solution is not acceptable. I thank you very much for the effort, anyway. :-)

Digitalis · Accepted Answer · 2014-02-24 23:10:14Z

0

^((http|ftp)[s]?://)?([\w-/.]+)(.pf)([\w-/.\&\%\$+\?]+)?$

Handles everything requested, unless I interpret the question wrong. Test here: http://www.cuneytyilmaz.com/prog/jrx/ Please, do tick case insensitive.

to implement in php use /^((http|ftp)[s]?://)?([\w-/.]+)(.pf)([\w-/.\&\%\$+\?]+)?$/i

edited Feb 24, 2014 at 23:10

answered Feb 24, 2014 at 9:19

Digitalis

5702 silver badges12 bronze badges

3 Comments

Digitalis Over a year ago

Thanks, somehow the escaped chars became unescaped when posting :)

Digitalis Over a year ago

In what sense, could you please be more specific? I could have it fixed in a matter of minutes I reckon

Digitalis Over a year ago

I updated my answer since I discovered I overlooked some details in the requirements. You can retest the regex and see that it will work. Should you need to add more special characters, please submit them here and I'll update the solution.

SagarPPanchal · Accepted Answer · 2014-02-24 09:16:15Z

-1

As per your need, you have to try this

 <?php
        $regex = "((https?|ftp)\:\/\/)?"; // SCHEME
        $regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?@)?"; // User and Pass
        $regex .= "([a-z0-9-.]*)\.([a-z]{2,4})"; // Host or IP
        $regex .= "(\:[0-9]{2,5})?"; // Port
        $regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
        $regex .= "(\?[a-z+&\$_.-][a-z0-9;:@&%=+\/\$_.-]*)?"; // GET Query
        $regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
    ?>

answered Feb 24, 2014 at 9:16

SagarPPanchal

10.2k6 gold badges36 silver badges66 bronze badges

Collectives™ on Stack Overflow

PHP, validate user submitted URL with particular domain

5 Answers 5

3 Comments

2 Comments

3 Comments

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

3 Comments

2 Comments

3 Comments

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related