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run code in 200+ php & hhvm versions
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<?php /** * @return array */ function crc64Table() { $crc64tab = []; // ECMA polynomial $poly64rev = (0xC96C5795 << 32) | 0xD7870F42; echo sprintf("%x", $poly64rev) . PHP_EOL; // ISO polynomial // $poly64rev = (0xD8 << 56); for ($i = 0; $i < 256; $i++) { for ($part = $i, $bit = 0; $bit < 8; $bit++) { if ($part & 1) { $part = (($part >> 1) & ~(0x8 << 60)) ^ $poly64rev; } else { $part = ($part >> 1) & ~(0x8 << 60); } } $crc64tab[$i] = $part; } return $crc64tab; } /** * @param string $string * @param string $format * @return mixed * * Formats: * crc64('php'); // afe4e823e7cef190 * crc64('php', '0x%x'); // 0xafe4e823e7cef190 * crc64('php', '0x%X'); // 0xAFE4E823E7CEF190 * crc64('php', '%d'); // -5772233581471534704 signed int * crc64('php', '%u'); // 12674510492238016912 unsigned int */ function crc64($string, $format = '%x') { static $crc64tab; if ($crc64tab === null) { $crc64tab = crc64Table(); } printf("%u", $crc64tab[1]); echo PHP_EOL; $crc = 0; for ($i = 0; $i < strlen($string); $i++) { //$crc = $crc64tab[($crc ^ ord($string[$i])) & 0xff] ^ (($crc >> 8) & ~(0xff << 56)); $crc = $crc64tab[$crc^ord($string[$i]) & 0xff] ^ ($crc >> 8) & ~(0xff << 56); } return sprintf($format, $crc); } echo crc64("123456", "%u");
based on Iu7dp
Output for 5.6.0 - 7.3.0beta1
c96c5795d7870f42 12911341560706588527 Notice: Undefined offset: 3855837706121835910 in /in/EFiio on line 61 Notice: Undefined offset: 15061866039538374 in /in/EFiio on line 61 Notice: Undefined offset: 58835414216902 in /in/EFiio on line 61 Notice: Undefined offset: 229825836741 in /in/EFiio on line 61 Notice: Undefined offset: 897757120 in /in/EFiio on line 61 3506863