<?php
$string = 'LONDON Remote server cluster 88: taken
udp://8379f690ba57e0fdf8f944324a4453de67780
BRUSSELS: Hosted MPLS cluster
udp://5b0e9bc72b989c87a9a70da7865dbb5b4aa9c086
PARIS: Hosted atrium access
udp://39415215319c9brt6b9c7d10238c19cc82e7f88b
PRAGUE: Main Office acces
udp://e721f751ab0936706192cf15b4632889b38f131a';
$data = preg_replace('#udp://(.*)#', 'http://www.$1/tsa.a3m', $string); echo $data;
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