Add support for IDNs and longer TLDs like .bank, .info and .berlin

Author: arnt

src/Autolink.php

@@ -97,7 +97,7 @@ public function convert(string $text, array $attribs = []): string
 
         $schemeRegex = sprintf($schemeRegex, $this->getSchemes(true));
 
-        $regex = '/(([a-zA-Z]*=")*' . $schemeRegex . "[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}([\/a-zA-Z0-9\-._~:?#\[\]@!$&'()*+,;=%\">]*)?)/";
+        $regex = '/(([a-zA-Z]*=")*' . $schemeRegex . "[\-\p{L}\p{N}\p{M}]+\.[\p{L}\p{M}]{2,}([\/\p{L}\p{N}\p{M}\-._~:?#\[\]@!$&'()*+,;=%\">]*)?)/u";
 
         return preg_replace_callback(
             $regex,

test/AutolinkTest.php

@@ -62,6 +62,10 @@ public function testConvert()
 
 This is URL inline: http://example.com/path#top with test.
 
+This is an IDN URL: http://dømi.fo
+
+This is an IDN URL in Devanagari: http://सार्वभौमिक-स्वीकृति-परीक्षण.संगठन
+
 This is URL in HTML:
 <a href="http://example.com/path?foo[1]=a&foo[2]=b">LINK</a>
 <a href="http://example.com/path?foo[1]=a&foo[2]=b">http://example.com/path?foo[1]=a&foo[2]=b</a>
@@ -92,6 +96,10 @@ public function testConvert()
 
 This is URL inline: <a href="http://example.com/path#top">http://example.com/path#top</a> with test.
 
+This is an IDN URL: <a href="http://dømi.fo">http://dømi.fo</a>
+
+This is an IDN URL in Devanagari: <a href="http://सार्वभौमिक-स्वीकृति-परीक्षण.संगठन">http://सार्वभौमिक-स्वीकृति-परीक्षण.संगठन</a>
+
 This is URL in HTML:
 <a href="http://example.com/path?foo[1]=a&foo[2]=b">LINK</a>
 <a href="http://example.com/path?foo[1]=a&foo[2]=b">http://example.com/path?foo[1]=a&foo[2]=b</a>
@@ -239,6 +247,15 @@ public function testLinkNoScheme()
         $this->instance->addScheme('skype');
 
         self::assertEquals('<a href="' . $url . '">' . $url . '</a>', $this->instance->convert($url));
+
+	$url = 'dømi.fo';
+
+        self::assertEquals('<a href="http://' . $url . '">' . $url . '</a>', $this->instance->convert($url));
+
+	$url = 'dømi.fo/dømi';
+
+        self::assertEquals('<a href="http://' . $url . '">' . $url . '</a>', $this->instance->convert($url));
+
     }
 
     /**