php循环通过域列表文件并删除子域

Question

I want to list a "file" with sub.domain.tld names, remove sub and list uniqe domain.tld names

I can't figure out why my output ($list) doubles the last line "voorbeeld.nl"

<?php
$lines=file("list.txt");

$list = array();  //create empty array
foreach ($lines as $line_num => $line) {
        $line_explode = explode('.', $line);
        array_push($list, $line_explode[1] .'.'. $line_explode[2]);

}
echo "<br>-----------<br>"; 
foreach(array_unique($list) as $Resuld){ 
    echo '>' . $Resuld .'< <br>'; 
}
echo "-----------<br>"; ? >

list.txt:

sub1.example.nl
sub2.example.nl
sub1.example.com
sub2.example.com
sub3.example.com
sub1.voorbeeld.nl
sub2.voorbeeld.nl
sub3.voorbeeld.nl

result:

-----------
>example.nl < 
>example.com < 
>voorbeeld.nl < 
>voorbeeld.nl< 
-----------

Answer 1

Check link https://eval.in/686821 This is working fine

In your output, I can see an extra space. Most probably, that can be reson for your issue.

>voorbeeld.nl < 
>voorbeeld.nl< 

Modify your code as follows

array_push($list, trim($line_explode[1]) .'.'. trim($line_explode[2]));