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  1. <?php
  2. $ip = '127.0.0.1/124';
  3. $subnet = '';
  4. if (preg_match('~^(.+?)/([^/]+)$~', $ip, $m)) {
  5. $ip = $m[1];
  6. $subnet = $m[2];
  7. }
  8. echo filter_var($ip, FILTER_VALIDATE_IP) . ", $subnet";
  9. ?>
Success #stdin #stdout 0.01s 20520KB
stdin
Standard input is empty
stdout
127.0.0.1, 124