note 119883 added to function.ip2long

Here are my versions of prefix to mask and mask to prefix conversions. You can remove first lines with if/preg of each function if you don't want sanity precheck. function prefix2Mask($prefix) { if (!preg_match('#^(?:0*[0-2]?[0-9]|3[0-2])$#', $prefix)) return false; # wrong prefix return long2ip(0xffffffff << (32 - $prefix)); } function mask2Prefix($mask) { if (!preg_match('#^(?:(?:[0-1][0-9][0-9]|2[0-4][0-9]|25[0-5]|[0-9][0-9]|[0-9])\.){3}'. '(?:[0-1][0-9][0-9]|2[0-4][0-9]|25[0-5]|[0-9][0-9]|[0-9])$#', $mask)) return false; # wrong mask $m2p = str_pad(substr(decbin(ip2long($mask)), -32, 32), 32, '0', STR_PAD_LEFT); if (!preg_match('#^(1*)0*$#', $m2p, $m)) return false; # wrong mask return strlen($m[1]); } ---- Server IP: 72.52.91.14 Probable Submitter: 212.71.0.254 ---- Manual Page -- http://php.net/manual/en/function.ip2long.php Edit -- https://master.php.net/note/edit/119883 Del: integrated -- https://master.php.net/note/delete/119883/integrated Del: useless -- https://master.php.net/note/delete/119883/useless Del: bad code -- https://master.php.net/note/delete/119883/bad+code Del: spam -- https://master.php.net/note/delete/119883/spam Del: non-english -- https://master.php.net/note/delete/119883/non-english Del: in docs -- https://master.php.net/note/delete/119883/in+docs Del: other reasons-- https://master.php.net/note/delete/119883 Reject -- https://master.php.net/note/reject/119883 Search -- https://master.php.net/manage/user-notes.php