3v4l.org

run code in 300+ PHP versions simultaneously
<?php function check_unique() { $seen = new ArrayObject(); return function ($value) use ($seen) { if (in_array($value, (array)$seen)) { return false; } $seen[] = $value; return true; }; } const ITEMS = 10000; $array = array_merge(range(1, ITEMS, 3), range(1, ITEMS, 2)); echo "started with ", count($array), " items\n"; $check_unique = check_unique(); $unique = []; echo "memory usage ", memory_get_peak_usage(), "\n"; $time = -microtime(true); foreach ($array as $value) { if ($check_unique($value)) { $unique[] = $value; } } $time += microtime(true); echo "memory usage ", memory_get_peak_usage(), "\n"; echo "took $time sec\n"; echo "finished with ", count($unique), " items\n";
Output for 7.4.1
started with 8334 items memory usage 1321536 memory usage 1986056 took 0.41924405097961 sec finished with 6667 items
Output for 7.4.0
started with 8334 items memory usage 1321536 memory usage 1986056 took 0.3996250629425 sec finished with 6667 items
Output for 7.3.13
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.32490110397339 sec finished with 6667 items
Output for 7.3.12
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.24370408058167 sec finished with 6667 items
Output for 7.3.11
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.32294392585754 sec finished with 6667 items
Output for 7.3.10
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.21829891204834 sec finished with 6667 items
Output for 7.3.9
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.30254817008972 sec finished with 6667 items
Output for 7.3.8
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.21594715118408 sec finished with 6667 items
Output for 7.3.7
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.21021699905396 sec finished with 6667 items
Output for 7.3.6
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.22731399536133 sec finished with 6667 items
Output for 7.3.5
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.25302386283875 sec finished with 6667 items
Output for 7.3.4
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.2326021194458 sec finished with 6667 items
Output for 7.3.3
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.24348592758179 sec finished with 6667 items
Output for 7.3.2
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.22730898857117 sec finished with 6667 items
Output for 7.3.1
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.28709316253662 sec finished with 6667 items
Output for 7.3.0
started with 8334 items memory usage 1321504 memory usage 1719728 took 0.28074979782104 sec finished with 6667 items
Output for 7.2.26
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.25951600074768 sec finished with 6667 items
Output for 7.2.25
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.33442902565002 sec finished with 6667 items
Output for 7.2.24
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.25552105903625 sec finished with 6667 items
Output for 7.2.23
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.23543620109558 sec finished with 6667 items
Output for 7.2.22
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.24450302124023 sec finished with 6667 items
Output for 7.2.21
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.29042720794678 sec finished with 6667 items
Output for 7.2.20
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.26569104194641 sec finished with 6667 items
Output for 7.2.19
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.27572798728943 sec finished with 6667 items
Output for 7.2.18
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.23668789863586 sec finished with 6667 items
Output for 7.2.17
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.22115302085876 sec finished with 6667 items
Output for 7.2.16
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.23352599143982 sec finished with 6667 items
Output for 7.2.15
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.26205897331238 sec finished with 6667 items
Output for 7.2.14
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.29398393630981 sec finished with 6667 items
Output for 7.2.13
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.27512693405151 sec finished with 6667 items
Output for 7.2.12
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.24106407165527 sec finished with 6667 items
Output for 7.2.11
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.21637010574341 sec finished with 6667 items
Output for 7.2.10
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.32777690887451 sec finished with 6667 items
Output for 7.2.9
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.26632595062256 sec finished with 6667 items
Output for 7.2.8
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.32581901550293 sec finished with 6667 items
Output for 7.2.7
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.31084895133972 sec finished with 6667 items
Output for 7.2.6
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.29891896247864 sec finished with 6667 items
Output for 7.2.5
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.21831703186035 sec finished with 6667 items
Output for 7.2.4
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.33056497573853 sec finished with 6667 items
Output for 7.2.3
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.21661591529846 sec finished with 6667 items
Output for 7.2.2
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.23521494865417 sec finished with 6667 items
Output for 7.2.1
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.30911493301392 sec finished with 6667 items
Output for 7.2.0
started with 8334 items memory usage 1317832 memory usage 1716056 took 0.33528208732605 sec finished with 6667 items
Output for 7.1.33
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.17647814750671 sec finished with 6667 items
Output for 7.1.32
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18200206756592 sec finished with 6667 items
Output for 7.1.31
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.19298005104065 sec finished with 6667 items
Output for 7.1.30
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.20662093162537 sec finished with 6667 items
Output for 7.1.29
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.21913695335388 sec finished with 6667 items
Output for 7.1.28
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.17968606948853 sec finished with 6667 items
Output for 7.1.27
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.1812539100647 sec finished with 6667 items
Output for 7.1.26
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18355083465576 sec finished with 6667 items
Output for 7.1.25
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18591284751892 sec finished with 6667 items
Output for 7.1.24
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18144392967224 sec finished with 6667 items
Output for 7.1.23
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.20181202888489 sec finished with 6667 items
Output for 7.1.22
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.1803150177002 sec finished with 6667 items
Output for 7.1.21
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.20418405532837 sec finished with 6667 items
Output for 7.1.20
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.19630599021912 sec finished with 6667 items
Output for 7.1.19
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18507599830627 sec finished with 6667 items
Output for 7.1.18
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26533102989197 sec finished with 6667 items
Output for 7.1.17
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26623797416687 sec finished with 6667 items
Output for 7.1.16
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.2636890411377 sec finished with 6667 items
Output for 7.1.15
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.19931697845459 sec finished with 6667 items
Output for 7.1.14
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.27348303794861 sec finished with 6667 items
Output for 7.1.13
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.2097909450531 sec finished with 6667 items
Output for 7.1.12
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26514005661011 sec finished with 6667 items
Output for 7.1.11
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.24310111999512 sec finished with 6667 items
Output for 7.1.10
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.20518803596497 sec finished with 6667 items
Output for 7.1.9
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26726198196411 sec finished with 6667 items
Output for 7.1.8
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.19225597381592 sec finished with 6667 items
Output for 7.1.7
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26615595817566 sec finished with 6667 items
Output for 7.1.6
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.19690489768982 sec finished with 6667 items
Output for 7.1.5
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.17916893959045 sec finished with 6667 items
Output for 7.1.4
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.2627489566803 sec finished with 6667 items
Output for 7.1.3
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.18464398384094 sec finished with 6667 items
Output for 7.1.2
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.17487382888794 sec finished with 6667 items
Output for 7.1.1
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26338195800781 sec finished with 6667 items
Output for 7.1.0
started with 8334 items memory usage 1281496 memory usage 1679720 took 0.26923394203186 sec finished with 6667 items
Output for 7.0.33
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.17959809303284 sec finished with 6667 items
Output for 7.0.32
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.17386603355408 sec finished with 6667 items
Output for 7.0.31
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.21076512336731 sec finished with 6667 items
Output for 7.0.30
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.20132803916931 sec finished with 6667 items
Output for 7.0.29
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.20186495780945 sec finished with 6667 items
Output for 7.0.28
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26169085502625 sec finished with 6667 items
Output for 7.0.27
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.21972918510437 sec finished with 6667 items
Output for 7.0.26
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.23924398422241 sec finished with 6667 items
Output for 7.0.25
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26318192481995 sec finished with 6667 items
Output for 7.0.24
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.23594808578491 sec finished with 6667 items
Output for 7.0.23
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.19046998023987 sec finished with 6667 items
Output for 7.0.22
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.18918895721436 sec finished with 6667 items
Output for 7.0.21
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.2665650844574 sec finished with 6667 items
Output for 7.0.20
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26305985450745 sec finished with 6667 items
Output for 7.0.19
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.24987316131592 sec finished with 6667 items
Output for 7.0.18
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.17810487747192 sec finished with 6667 items
Output for 7.0.17
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.17702484130859 sec finished with 6667 items
Output for 7.0.16
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.18482494354248 sec finished with 6667 items
Output for 7.0.15
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26180291175842 sec finished with 6667 items
Output for 7.0.14
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26420092582703 sec finished with 6667 items
Output for 7.0.13
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26867890357971 sec finished with 6667 items
Output for 7.0.12
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.25177001953125 sec finished with 6667 items
Output for 7.0.11
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.23861789703369 sec finished with 6667 items
Output for 7.0.10
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26780295372009 sec finished with 6667 items
Output for 7.0.9
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.19487500190735 sec finished with 6667 items
Output for 7.0.8
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.18326997756958 sec finished with 6667 items
Output for 7.0.7
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.28113508224487 sec finished with 6667 items
Output for 7.0.6
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.27337718009949 sec finished with 6667 items
Output for 7.0.5
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.26282811164856 sec finished with 6667 items
Output for 7.0.4
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.27235889434814 sec finished with 6667 items
Output for 7.0.3
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.27221584320068 sec finished with 6667 items
Output for 7.0.2
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.186518907547 sec finished with 6667 items
Output for 7.0.1
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.18488216400146 sec finished with 6667 items
Output for 7.0.0
started with 8334 items memory usage 1281456 memory usage 1680056 took 0.271075963974 sec finished with 6667 items
Output for 5.6.40
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.3180241584778 sec finished with 6667 items
Output for 5.6.0 - 5.6.2, 5.6.4 - 5.6.30, 5.6.39
started with 8334 items memory usage 2375752
Process exited with code 137.
Output for 5.6.38
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4581868648529 sec finished with 6667 items
Output for 5.6.37
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.360100030899 sec finished with 6667 items
Output for 5.6.36
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.349338054657 sec finished with 6667 items
Output for 5.6.35
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4201219081879 sec finished with 6667 items
Output for 5.6.34
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4202260971069 sec finished with 6667 items
Output for 5.6.33
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4667510986328 sec finished with 6667 items
Output for 5.6.32
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4262490272522 sec finished with 6667 items
Output for 5.6.31
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.3749208450317 sec finished with 6667 items
Output for 5.6.3
started with 8334 items memory usage 2375752 memory usage 3451280 took 2.4740037918091 sec finished with 6667 items
Output for 5.5.0 - 5.5.38
started with 8334 items memory usage 2375488
Process exited with code 137.
Output for 5.4.10 - 5.4.25, 5.4.27 - 5.4.45
started with 8334 items memory usage 2375864
Process exited with code 137.
Output for 5.4.26
started with 8334 items memory usage 2375864 memory usage 3451392 took 2.4640538692474 sec finished with 6667 items
Output for 5.4.1 - 5.4.9
started with 8334 items memory usage 2375944
Process exited with code 137.
Output for 5.4.0
started with 8334 items memory usage 2375944 memory usage 3451648 took 2.3816668987274 sec finished with 6667 items
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/4pvOJ on line 19
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/4pvOJ on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/4pvOJ on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4pvOJ on line 5
Process exited with code 255.
preferences:
218.89 ms | 401 KiB | 325 Q