Compare host name from array of URLs and get unique values - php

Question

I need to compare URLs and remove duplicates from array but I want compare only host from url. I need skip http and https and www and others like last slash when I compare.
So when I have array:
$urls = array(
'http://www.google.com/test',
'https://www.google.com/test',
'https://www.google.com/example',
'https://www.facebook.com/example',
'http://www.facebook.com/example');
Result will be only
http://www.google.com/test
http://www.google.com/example
http://www.facebook.com/example
I tried to compare like :
$urls = array_udiff($urls, $urls, function ($a, $b) {
return strcmp(preg_replace('|^https?://(www\\.)?|', '', rtrim($a,'/')), preg_replace('|^https?://(www\\.)?|', '', rtrim($b,'/')));
});
But it return me empty array.

Answer 1

<?php
$urls = array(
'http://www.google.com/test',
'https://www.google.com/test',
'https://www.google.com/example',
'https://www.facebook.com/example',
'http://www.facebook.com/example');
$MyArray = [];
for($i=0;$i<count($urls);$i++) {
preg_match_all('/www.(.*)/', $urls[$i], $matches);
if (!in_array($matches[1], $MyArray))
$MyArray[] = $matches[1];
}
echo "<pre>";
print_r($MyArray);
echo "</pre>";
And the output is
Array
(
[0] => Array
(
[0] => google.com/test
)
[1] => Array
(
[0] => google.com/example
)
[2] => Array
(
[0] => facebook.com/example
)
)
trimmed and keeping only the host name

Answer 2

Try this approach :
<?php
function parseURLs(array $urls){
$rs = [];
foreach($urls as $url){
$segments = parse_url($url);
if(!in_array($segments['host'], $rs))
$rs[] = $segments['host'];
}
return $rs;
}
Then :
<?php
$urls = array(
'http://www.google.com',
'https://www.google.com',
'https://www.google.com/',
'https://www.facebook.com',
'http://www.facebook.com'
);
$uniqueURLs = parseURLs($urls);
print_r($uniqueURLs);
/* result :
Array
(
[0] => www.google.com
[1] => www.facebook.com
)
*/

Answer 3

You need to Loop through the URL's, Parse URL with PHP's url_parse() function and use array_unique to remove duplicates from array, so we are checking both the host and path ..
I have written a class for you:
<?php
/** Get Unique Values from array Values **/
Class Parser {
//Url Parser Function
public function arrayValuesUrlParser($urls) {
//Create Container
$parsed = [];
//Loop Through the Urls
foreach($urls as $url) {
$parse = parse_url($url);
$parsed[] = $parse["host"].$parse["path"];
//Delete Duplicates
$result = array_unique($parsed);
}
//Dump result
print_r($result);
}
}
?>
Using the Class
<?php
//Inlcude tghe Parser
include_once "Parser.php";
$urls = array(
'http://www.google.com/test',
'https://www.google.com/test',
'https://www.google.com/example',
'https://www.facebook.com/example',
'http://www.facebook.com/example');
//Instantiate
$parse = new Parser();
$parse->arrayValuesUrlParser($urls);
?>
You can do it in one file if you don't need to seperate files but you will have to remove include_once if you are using one php file. This class is also on PHP Classes, did it for fun !
Best of Luck !