- preg_match_all: documentation ( source)
- str_replace: documentation ( source)
- stripos: documentation ( source)
<?php
$text = <<<TXT
http://www.something.com and https://www.something.com</p> are working. Also http://www.something.com/some/thing/index.html works.
www.something.com not and http://something.com. also gives a problem. Also https://something.com/something/else/test?something=true.
This is a test for the URL thingy.This is a test for the URL thingy.This is.... etc..
TXT;
if (preg_match_all('~(https?://|www)[a-z\d.-]+[\w/.?=&%:#]*\w~i', $text, $matches)) {
foreach ($matches[0] as $url) {
$prefix = stripos($url, 'www') === 0 ? 'http://' : '';
$text = str_replace($url, "<a href='{$prefix}{$url}'>{$url}</a>", $text);
}
}
echo $text;