3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gdr_encode($val) { $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!='; $base = strlen($chars); $str = ''; while ($val > 0) { $str .= $chars[$val % $base]; $val = (int)($val / $base); } return $str; } function gdr_decode($str) { $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!='; $base = strlen($chars); $map = array(); for ($i=0; $i<$base; $i++) { $map[$chars[$i]] = $i; } echo print_r($map, false) . "\n"; $val = 0; for ($i=0; $i<strlen($str); $i++) { $val *= $base; $val += (int)$map[$str[$i]]; } return $val; } //$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 4294967295, 4294967296); $vals = array(1); foreach ($vals as $val) { $enc = json_encode(gdr_encode($val)); $dec = json_encode(gdr_decode($enc)); $val = json_encode($val); if (strlen($enc) > strlen($val)) { echo "$enc $val WORSE\n"; } else if (strlen($enc) == strlen($val)) { echo "$enc $val EQUAL\n"; } else { echo "$enc $val\n"; } }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [A] => 0 [B] => 1 [C] => 2 [D] => 3 [E] => 4 [F] => 5 [G] => 6 [H] => 7 [I] => 8 [J] => 9 [K] => 10 [L] => 11 [M] => 12 [N] => 13 [O] => 14 [P] => 15 [Q] => 16 [R] => 17 [S] => 18 [T] => 19 [U] => 20 [V] => 21 [W] => 22 [X] => 23 [Y] => 24 [Z] => 25 [a] => 26 [b] => 27 [c] => 28 [d] => 29 [e] => 30 [f] => 31 [g] => 32 [h] => 33 [i] => 34 [j] => 35 [k] => 36 [l] => 37 [m] => 38 [n] => 39 [o] => 40 [p] => 41 [q] => 42 [r] => 43 [s] => 44 [t] => 45 [u] => 46 [v] => 47 [w] => 48 [x] => 49 [y] => 50 [z] => 51 [0] => 52 [1] => 53 [2] => 54 [3] => 55 [4] => 56 [5] => 57 [6] => 58 [7] => 59 [8] => 60 [9] => 61 [!] => 62 [=] => 63 ) 1 Warning: Undefined array key """ in /in/vZ3HU on line 25 Warning: Undefined array key """ in /in/vZ3HU on line 25 "B" 1 WORSE
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Array ( [A] => 0 [B] => 1 [C] => 2 [D] => 3 [E] => 4 [F] => 5 [G] => 6 [H] => 7 [I] => 8 [J] => 9 [K] => 10 [L] => 11 [M] => 12 [N] => 13 [O] => 14 [P] => 15 [Q] => 16 [R] => 17 [S] => 18 [T] => 19 [U] => 20 [V] => 21 [W] => 22 [X] => 23 [Y] => 24 [Z] => 25 [a] => 26 [b] => 27 [c] => 28 [d] => 29 [e] => 30 [f] => 31 [g] => 32 [h] => 33 [i] => 34 [j] => 35 [k] => 36 [l] => 37 [m] => 38 [n] => 39 [o] => 40 [p] => 41 [q] => 42 [r] => 43 [s] => 44 [t] => 45 [u] => 46 [v] => 47 [w] => 48 [x] => 49 [y] => 50 [z] => 51 [0] => 52 [1] => 53 [2] => 54 [3] => 55 [4] => 56 [5] => 57 [6] => 58 [7] => 59 [8] => 60 [9] => 61 [!] => 62 [=] => 63 ) 1 Notice: Undefined index: " in /in/vZ3HU on line 25 Notice: Undefined index: " in /in/vZ3HU on line 25 "B" 1 WORSE
Output for 7.3.32 - 7.3.33
Array ( [A] => 0 [B] => 1 [C] => 2 [D] => 3 [E] => 4 [F] => 5 [G] => 6 [H] => 7 [I] => 8 [J] => 9 [K] => 10 [L] => 11 [M] => 12 [N] => 13 [O] => 14 [P] => 15 [Q] => 16 [R] => 17 [S] => 18 [T] => 19 [U] => 20 [V] => 21 [W] => 22 [X] => 23 [Y] => 24 [Z] => 25 [a] => 26 [b] => 27 [c] => 28 [d] => 29 [e] => 30 [f] => 31 [g] => 32 [h] => 33 [i] => 34 [j] => 35 [k] => 36 [l] => 37 [m] => 38 [n] => 39 [o] => 40 [p] => 41 [q] => 42 [r] => 43 [s] => 44 [t] => 45 [u] => 46 [v] => 47 [w] => 48 [x] => 49 [y] => 50 [z] => 51 [0] => 52 [1] => 53 [2] => 54 [3] => 55 [4] => 56 [5] => 57 [6] => 58 [7] => 59 [8] => 60 [9] => 61 [!] => 62 [=] => 63 ) 1 "B" 1 WORSE
Output for 5.2.0 - 5.2.17
Array ( [A] => 0 [B] => 1 [C] => 2 [D] => 3 [E] => 4 [F] => 5 [G] => 6 [H] => 7 [I] => 8 [J] => 9 [K] => 10 [L] => 11 [M] => 12 [N] => 13 [O] => 14 [P] => 15 [Q] => 16 [R] => 17 [S] => 18 [T] => 19 [U] => 20 [V] => 21 [W] => 22 [X] => 23 [Y] => 24 [Z] => 25 [a] => 26 [b] => 27 [c] => 28 [d] => 29 [e] => 30 [f] => 31 [g] => 32 [h] => 33 [i] => 34 [j] => 35 [k] => 36 [l] => 37 [m] => 38 [n] => 39 [o] => 40 [p] => 41 [q] => 42 [r] => 43 [s] => 44 [t] => 45 [u] => 46 [v] => 47 [w] => 48 [x] => 49 [y] => 50 [z] => 51 [0] => 52 [1] => 53 [2] => 54 [3] => 55 [4] => 56 [5] => 57 [6] => 58 [7] => 59 [8] => 60 [9] => 61 [!] => 62 [=] => 63 ) 1 Notice: Undefined index: " in /in/vZ3HU on line 25 Notice: Undefined index: " in /in/vZ3HU on line 25 "B" 1 WORSE
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/vZ3HU on line 33
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/vZ3HU on line 33
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/vZ3HU on line 33
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/vZ3HU on line 33
preferences:
274.52 ms | 401 KiB | 459 Q