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run code in 300+ PHP versions simultaneously
<?php foreach(array( '', 'x', ' ', '0.0.0.0', '255.255.255.255', // Some bad IP '127.0.0.1', // localhost '10.0.0.0', '192.168.0.1', 'fe80::414a:a44e:53f2:e694%21', 'fe80::414a:a44e:53f2:e694', // Private IP addresses '8.8.8.8', '88.149.1.2', // Good ) as $ip) { echo "'$ip' => "; var_dump(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)); }
Output for git.master, git.master_jit, rfc.property-hooks
'' => bool(false) 'x' => bool(false) ' ' => bool(false) '0.0.0.0' => bool(false) '255.255.255.255' => bool(false) '127.0.0.1' => bool(false) '10.0.0.0' => bool(false) '192.168.0.1' => bool(false) 'fe80::414a:a44e:53f2:e694%21' => bool(false) 'fe80::414a:a44e:53f2:e694' => bool(false) '8.8.8.8' => string(7) "8.8.8.8" '88.149.1.2' => string(10) "88.149.1.2"

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