<?php
$MyString = 'Amazon.com: pada port .com3 Dog Name Tags.com googl.com® any.com™ on mys.co.uk® end.Commando is .commitment.com & communism.ca';
echo preg_replace('~\.(com|info|us|org|top|xyz|co\.in|co\.uk|ca|mobi)\b~i', '', $MyString );
PD9waHAKCiRNeVN0cmluZyA9ICdBbWF6b24uY29tOiBwYWRhIHBvcnQgLmNvbTMgRG9nIE5hbWUgVGFncy5jb20gZ29vZ2wuY29twq4gYW55LmNvbeKEoiBvbiBteXMuY28udWvCriBlbmQuQ29tbWFuZG8gaXMgLmNvbW1pdG1lbnQuY29tICYgY29tbXVuaXNtLmNhJzsKZWNobyBwcmVnX3JlcGxhY2UoJ35cLihjb218aW5mb3x1c3xvcmd8dG9wfHh5enxjb1wuaW58Y29cLnVrfGNhfG1vYmkpXGJ+aScsICcnLCAkTXlTdHJpbmcgKTs=