3v4l.org

run code in 300+ PHP versions simultaneously
<?php $some_string = "Ку ку"; $arra_c = array("UCS-4", "UCS-4BE", "UCS-4LE", "UCS-2", "UCS-2BE", "UCS-2LE", "UTF-32", "UTF-32BE", "UTF-32LE", "UTF-16", "UTF-16BE", "UTF-16LE", "UTF-7", "UTF7-IMAP", "UTF-8", "ASCII", "EUC-JP", "SJIS", "eucJP-win", "SJIS-win", "ISO-2022-JP", "ISO-2022-JP-MS", "CP932", "CP51932", "SJIS-mac", "SJIS-Mobile#DOCOMO", "SJIS-Mobile#KDDI", "SJIS-Mobile#SOFTBANK", "UTF-8-Mobile#DOCOMO", "UTF-8-Mobile#KDDI-A", "UTF-8-Mobile#KDDI-B", "UTF-8-Mobile#SOFTBANK", "ISO-2022-JP-MOBILE#KDDI", "JIS", "JIS-ms", "CP50220", "CP50220raw", "CP50221", "CP50222", "ISO-8859-1", "ISO-8859-2", "ISO-8859-3", "ISO-8859-4", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "byte2be", "byte2le", "byte4be", "byte4le", "BASE64", "HTML-ENTITIES", "7bit", "8bit", "EUC-CN", "CP936", "GB18030", "HZ", "EUC-TW", "CP950", "BIG-5", "EUC-KR", "UHC",// (CP949) "ISO-2022-KR", "Windows-1251",// (CP1251) "Windows-1252",// (CP1252) "CP866",// (IBM866) "KOI8-R"); foreach($arra_c as $k => $v){ var_dump(mb_convert_encoding($some_string,$v,"UTF-8" ). "-" . $v ."#". strlen(json_encode(array('message' => mb_convert_encoding($some_string,$v,"UTF-8" )))); } //var_dump(mb_detect_encoding($some_string)); //var_dump(strlen(json_encode(array('message' => $some_string))));

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
5.4.250.0100.07018.74
5.4.240.0170.06318.96
5.4.230.0130.05318.79
5.4.220.0170.06718.93
5.4.210.0100.05319.00
5.4.200.0070.05318.79
5.4.190.0030.08019.00
5.4.180.0200.04018.73
5.4.170.0030.07018.98
5.4.160.0100.05018.97
5.4.150.0100.05318.90
5.4.140.0270.06716.42
5.4.130.0030.07716.38
5.4.120.0130.04316.45
5.4.110.0070.05716.51
5.4.100.0170.05716.46
5.4.90.0130.04716.50
5.4.80.0030.05016.48
5.4.70.0070.06716.36
5.4.60.0100.05716.35
5.4.50.0030.05016.51
5.4.40.0070.05316.54
5.4.30.0030.05316.53
5.4.20.0100.05016.51
5.4.10.0100.06716.48
5.4.00.0100.04715.71
5.3.280.0070.05314.63
5.3.270.0130.05314.62
5.3.260.0100.05014.67
5.3.250.0100.05014.32
5.3.240.0100.05014.39
5.3.230.0030.07014.62
5.3.220.0070.05714.42
5.3.210.0170.06714.63
5.3.200.0070.05014.73
5.3.190.0130.05714.44
5.3.180.0130.06314.58
5.3.170.0230.04014.44
5.3.160.0170.04014.58
5.3.150.0070.05314.43
5.3.140.0100.06314.52
5.3.130.0100.05714.58
5.3.120.0030.05714.45
5.3.110.0070.08014.58
5.3.100.0100.05314.05
5.3.90.0230.05714.08
5.3.80.0070.05714.07
5.3.70.0100.04714.05
5.3.60.0070.06013.90
5.3.50.0100.05013.73
5.3.40.0070.05313.82
5.3.30.0070.05013.97
5.3.20.0170.05013.57
5.3.10.0030.05013.71
5.3.00.0030.07713.75

preferences:
149.21 ms | 1386 KiB | 7 Q