난수생성함수
string random_bytes ( int $length ) - PHP7 이상에서만 동작
int random_int ( int $min , int $max ) - PHP7 이상에서만 동작
string openssl_random_pseudo_bytes ( int $length [, bool &$crypto_strong ] ) - PHP5.3 이상에서 동작
string bin2hex ( string $str ) - 바이너리 데이터를 16진수 hexa 값으로 변환
Lengths: Bytes: 1 and Hex: 2
string(2) "2d"
Lengths: Bytes: 2 and Hex: 4
string(4) "4310"
Lengths: Bytes: 3 and Hex: 6
string(6) "21100c"
Lengths: Bytes: 4 and Hex: 8
string(8) "177e9968"
Lengths: Bytes: 5 and Hex: 10
string(10) "93e757669d"
Lengths: Bytes: 6 and Hex: 12
string(12) "e63af10c19d1"
Lengths: Bytes: 7 and Hex: 14
string(14) "3f5a453ef42fa0"
Lengths: Bytes: 8 and Hex: 16
string(16) "46ee09d2c4766be4"
Lengths: Bytes: 9 and Hex: 18
string(18) "32991f5c46acaf84ed"
Lengths: Bytes: 10 and Hex: 20
string(20) "30926101e7f7638cce77"
Lengths: Bytes: 11 and Hex: 22
string(22) "047732aef691812dea5d25"
Lengths: Bytes: 12 and Hex: 24
string(24) "e43b8ff1029839a7f1b6e5f2"
Lengths: Bytes: 13 and Hex: 26
string(26) "2bb782339651f05b6b68638326"
Lengths: Bytes: 14 and Hex: 28
string(28) "c5578cd418fa9461665933a382bd"
Lengths: Bytes: 15 and Hex: 30
string(30) "40306030d01b723d34d7536d4c4e8f"
Lengths: Bytes: 16 and Hex: 32
string(32) "2b666d2b93bd5c37e436d0983e29a368"
Lengths: Bytes: 17 and Hex: 34
string(34) "d155bf172d2fbf81928111f1f843f00dbf"
Lengths: Bytes: 18 and Hex: 36
string(36) "6a0d8abf0601a8536a5a89784f0e682848a6"
Lengths: Bytes: 19 and Hex: 38
string(38) "b42056147d20aad66115271d72b3db2810a4e9"
Lengths: Bytes: 20 and Hex: 40
string(40) "e1f4a4bf38141c074c3d495d392ab7d9346df809"
Lengths: Bytes: 21 and Hex: 42
string(42) "e48ff0e64b727fbc2e9f5860335dad70f7a1c2f21b"
Lengths: Bytes: 22 and Hex: 44
string(44) "f283c764acccb2ba5e211778ee6f9fe5962ace97eae5"
Lengths: Bytes: 23 and Hex: 46
string(46) "79209ebabf5882ed6401225b333da0649b2dda341ce0fe"
Lengths: Bytes: 24 and Hex: 48
string(48) "b081978cb583286c1bd52df8de1393f2887b9ca3ee876c81"
Lengths: Bytes: 25 and Hex: 50
string(50) "2d97dfb3acb5d9237ea144d75c6f408479d2e35e338daa082a"
Lengths: Bytes: 26 and Hex: 52
string(52) "3a2251da9fd9373cef3740aa86d20ff8bf01a87700a17ce24b6a"
Lengths: Bytes: 27 and Hex: 54
string(54) "1a2e7aa76c9c948bc5b8763377c1ff9e51c7deaba055f17f3afacc"
Lengths: Bytes: 28 and Hex: 56
string(56) "3b1991764ed29087373c2980e3f44960da82d4b29b608495e526ffd9"
Lengths: Bytes: 29 and Hex: 58
string(58) "5471fdf4d2a71cfb2bbf093f6b2a18b62200170e45ffb5df8c97c6b8d5"
Lengths: Bytes: 30 and Hex: 60
string(60) "75cb5a8a035d13bf5a5ea4a3f765caf01643dfd4328b1727697c59a0d680"
Lengths: Bytes: 31 and Hex: 62
string(62) "04095a783e0b731cd3faf283b16dfb364350c0cf4cd29170563cf122c9cd78"
Lengths: Bytes: 32 and Hex: 64
string(64) "28b9ef8d5119f9ca0c8bc154b4f10b217691b10d27595481b486173c5feee958"
Lengths: Bytes: 33 and Hex: 66
string(66) "cbb4976ff73ee1b0061cb837656908d6b62214cf50c7966cedeb8ca209582955be"
Lengths: Bytes: 34 and Hex: 68
string(68) "b8b555ff0cb2a3aa8344228290cecbecda56832030965e4cbf6afcf12f59235f53d7"
Lengths: Bytes: 35 and Hex: 70
string(70) "ff63eca01ce339c99edef649ab54fef8893dad44d3633cdea90a4defb5c6d1182c9b14"
Lengths: Bytes: 36 and Hex: 72
string(72) "5594e32d244d5c29362ae0ae0270b1395120f8ab7acfda0b29e4ab3c79e66fe06e1af14a"
Lengths: Bytes: 37 and Hex: 74
string(74) "5b0764c2f2b61fed18e5e9dc9c34eb0d7a0b55687e5cb5b9ab3efc42755aa22be950c0bdfd"
Lengths: Bytes: 38 and Hex: 76
string(76) "a8d4dccb3159021d9537ac515a2bd2a803fe578f3f001e5a21e09f90f2c79382b64636ab7855"
Lengths: Bytes: 39 and Hex: 78
string(78) "a466c51503b9bd93532a9f064736b981643d446da6185fc47cf3c6c81f18d59d05e70121e095f4"
Lengths: Bytes: 40 and Hex: 80
string(80) "302dfb013d399006f9aeb24d85b8262c6f2f727c4e889f5da0d2a38a9b8fec918a5d5cd31c5111dc"
Lengths: Bytes: 41 and Hex: 82
string(82) "2f1dfb5e0da08a29bf775d26dd4eb4bb8d6a7d3df9e81def3033bf53a9989aa23577a97bcc524d5706"
Lengths: Bytes: 42 and Hex: 84
string(84) "99895c563cc47c908dd4aa69c16e3e02c3aaaea298e1707fc2e2c612103fe063b612bc0c550b616d65a9"
Lengths: Bytes: 43 and Hex: 86
string(86) "f53ecdc8d0fcaa6e70f14c65e7d4a19b6e92fa5174c454b95a7c16b0fc076995b45b5e3b297e47ef501b6d"
Lengths: Bytes: 44 and Hex: 88
string(88) "4a0d58b88b3e7347d1aadef5e706ba992e98d8ee14c2b5b4f3bcac792f7e38cc52237358147e4120ed3c1c21"
Lengths: Bytes: 45 and Hex: 90
string(90) "b6384e98140f8352f7bdd29db95f4bd2191e1353f53c2de7f1cb10814bea816fae5793c4d9e018ef0792c8d40f"
Lengths: Bytes: 46 and Hex: 92
string(92) "be4770129b431b27bf53eb163f0324f0e028d215281dfc97bdc6a6fec3e68cf898d148dc11c6b3400b1c3353d091"
Lengths: Bytes: 47 and Hex: 94
string(94) "b58960f72ee4dc6351b91a33bd439a56bac2dfeedebd626ddc8a044416227f1270bcbb29c1ea44ad309b5641830e20"
Lengths: Bytes: 48 and Hex: 96
string(96) "a31b53a37cf72190b22678980fc8bff467da118084389b8fecaa12f95df444d36e3cea6ee51f1311848c2881b7a81a93"
Lengths: Bytes: 49 and Hex: 98
string(98) "f302df584124e0b6abe5d981431875af013024fc225b3413dbcf836c098400c5d9c3830e91149622cb50bd231e73bbbf84"
Lengths: Bytes: 50 and Hex: 100
string(100) "3bf01622186881fefa7bcb5602dbf9cf2488b2acac2e3f010aa6c513f6e37a0336a5ea7eb6e594acdd5dd4b09acc4516a649"