<?php $ip = '127.0.0.1'; function test($ip) { if (false !== strpos($ip, '/')) { list($address, $netmask) = explode('/', $ip, 2); if ($netmask < 1 || $netmask > 32) { return false; } } else { $address = $ip; $netmask = 32; } return [$address, $netmask]; } var_dump(test('127.0.0.1')); var_dump(test('10.0.0.3/29'));
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