3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ip = '\x7F\0\0\x01'; preg_match_all('/\\\x?([\dA-F]+)/', $ip, $parts); $ip = implode('', array_map(function ($v) { return chr(hexdec($v)); }, $parts[1])); echo inet_ntop($ip) . "\n"; $ip = '\x7F\0\0\x01'; $ip = pack('H*', str_replace(array('\x', '\0'), array('', '00'), $ip)); echo inet_ntop($ip);
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98.5 ms | 1403 KiB | 5 Q