PHP Finding a domain name and domain extension from an array

Question

I have an array of data containing some domains with TLD extensions. I want to collect the domain name and TLD extension seperately.

E.g. From "hello.com" I want to collect "hello" as one variable, and then collect ".com" as another variable.

Another E.g. IMPORTANT, from "hello.co.uk" I want to collect "hello" as one variable, and then collect ".co.uk" as another variable.

My current code using pathinfo() will work correctly on "hello.com", but not "hello.co.uk". For "hello.co.uk" it will collect "hello.co" as one variable, and then collect ".uk" as another variable.

Here is the code I am using:

// Get a file into an array
$lines = file($_FILES['file']['tmp_name']);

// Loop through array
foreach ($lines as $line_num => $line) {
    echo $line;

    //Find TLD
    $tld = ".".pathinfo($line, PATHINFO_EXTENSION);
    echo $tld;

    //Find Domain
    $domain = pathinfo($line, PATHINFO_FILENAME);
    echo $domain;
    }

Hopefully I explained that well enough. I use stackoverflow a lot but couldn't find a specific example of this.

Thanks

What do you want to get for subdomain.hello.co.uk? The answers given so far will give domain = subdomain, extension = hello.co.uk. — Barmar
– Barmar, Commented Jan 8, 2013 at 3:28
@Barmar: For these cases there is data.iana.org/TLD/tlds-alpha-by-domain.txt - Which shows that OP is already looking for the subdomain on the most lefthand side. - for the other needs there is publicsuffix.org — hakre
– hakre, Commented Jan 8, 2013 at 10:31

Taz · Accepted Answer · 2013-01-08 03:23:48Z

4

Instead of using functions intended for files, you could just use some simple string manipulation:

$domain = substr($line, 0, strpos($line, "."));
$tld = substr($line, strpos($line, "."), (strlen($line) - strlen($domain)));

edited Jan 8, 2013 at 3:23

answered Jan 8, 2013 at 3:18

Taz

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1 Comment

Taz Over a year ago

Edited my strpos to strstr because I doubted myself then realised I was right the first time... Lesson: never doubt one's self.

mynewaccount · Accepted Answer · 2013-01-08 03:30:28Z

2

First method:

$domains = array("hello.co.uk", "hello.com");

foreach ($domains as $d) {

    $ext = strstr($d, '.'); // extension
    $index = strpos($d, '.');

    $arr = str_split($d, $index);

    $domain = $arr[0]; // domain name


    echo "domain: $domain, extension: $ext <br/>";

}

Second method: (Thanks to hakre)

$domains = array("hello.co.uk", "hello.com");

foreach ($domains as $d) {

    list($domain, $ext) = explode('.', $d, 2);
    echo "domain: $domain, extension: $ext <br/>";

}

edited Jan 8, 2013 at 3:30

answered Jan 8, 2013 at 3:17

mynewaccount

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Comments

Oleksandr Fediashov · Accepted Answer · 2016-06-20 10:20:09Z

1

For work with two (co.uk) and three level TLDs (act.edu.au) you need library that using Public Suffix List (list of top level domains), I recomend to use TLDExtract.

answered Jun 20, 2016 at 10:20

Oleksandr Fediashov

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Josh Brody · Accepted Answer · 2013-01-08 04:03:00Z

0

Here's a function that's pretty flexible, and will work with everything from example.com to http://username:[email protected]/public_html/test.zip to ftp://[email protected] to http://www.reddit.com/r/aww/comments/165v9u/shes_allergic_couldnt_help_herself/

function splitDomain($url) { 
 $host = "";
 $url = parse_url($url);
 if(isset($url['host'])) { 
    $host = $url['host'];
 } else {
    $host = $url['path'];
 }
 $host = str_replace('www.','',$host);
 $tmp = explode('.', $host);
 $name = $tmp[0];
 $tld = $tmp[1];
return array('name'=>$name,'tld'=>$tld);
}

answered Jan 8, 2013 at 4:03

Josh Brody

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1 Comment

user752723 Over a year ago

Good answer! :) +1 (PS. I'm the guy from here stackoverflow.com/questions/14087116/…)

Alnitak · Accepted Answer · 2013-01-08 07:53:56Z

0

There's no reliable way of doing this other than to use a large table of legal extensions.

A popular table is the one known as the Public Suffix List.

answered Jan 8, 2013 at 7:53

Alnitak

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