3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = '😀'; echo '=== UTF-8 =============================', PHP_EOL; echo 'STRING: ', $string, PHP_EOL; echo 'CHARACTERS: ', mb_strlen($string), PHP_EOL; // 1 echo 'BYTE COUNT: ', mb_strlen($string, '8bit'), PHP_EOL; // 4 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // [0x1f600] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // 4 } echo '=======================================', PHP_EOL, PHP_EOL; $string = mb_convert_encoding($string, 'UTF-16', 'UTF-8'); echo '=== UTF-16 ============================', PHP_EOL; echo 'STRING: ', $string, PHP_EOL; echo 'CHARACTERS: ', mb_strlen($string), PHP_EOL; // should be 1, is 2 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // shold be 4, is 4 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // should be [0x1f600], is [0x0, 0x0] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // should be [4], is [2, 2] } echo '=======================================', PHP_EOL;

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)
8.3.60.0040.01116.63
8.3.50.0040.01116.30
8.3.40.0040.01118.85
8.3.30.0110.00718.78
8.3.20.0040.00420.77
8.3.10.0000.00823.59
8.3.00.0070.00021.73
8.2.180.0110.01116.32
8.2.170.0120.00422.96
8.2.160.0030.01022.08
8.2.150.0060.00324.18
8.2.140.0060.00324.66
8.2.130.0070.00026.16
8.2.120.0040.00426.16
8.2.110.0000.00920.44
8.2.100.0030.01019.64
8.2.90.0070.00317.63
8.2.80.0090.00018.82
8.2.70.0050.00917.38
8.2.60.0040.00417.75
8.2.50.0000.00818.04
8.2.40.0070.00318.07
8.2.30.0040.00419.35
8.2.20.0100.00018.14
8.2.10.0000.00719.46
8.2.00.0070.00019.28
8.1.280.0170.00325.92
8.1.270.0040.00420.66
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.83
8.1.230.0070.00417.82
8.1.220.0000.00817.79
8.1.210.0080.00018.77
8.1.200.0100.00017.35
8.1.190.0040.00417.23
8.1.180.0000.00918.10
8.1.170.0040.00417.62
8.1.160.0040.00419.03
8.1.150.0070.00019.11
8.1.140.0070.00020.86
8.1.130.0050.00222.09
8.1.120.0040.00417.62
8.1.110.0000.00817.59
8.1.100.0040.00417.51
8.1.90.0070.00017.56
8.1.80.0070.00017.41
8.1.70.0000.00817.60
8.1.60.0000.00817.69
8.1.50.0050.00317.52
8.1.40.0030.00617.51
8.1.30.0000.00817.69
8.1.20.0000.00817.76
8.1.10.0050.00217.48
8.1.00.0040.00417.55
8.0.300.0090.00018.77
8.0.290.0030.00616.75
8.0.280.0000.00718.55
8.0.270.0030.00318.07
8.0.260.0080.00020.15
8.0.250.0000.00717.05
8.0.240.0080.00017.05
8.0.230.0030.00316.94
8.0.220.0080.00016.90
8.0.210.0040.00416.95
8.0.200.0000.00817.07
8.0.190.0040.00417.07
8.0.180.0040.00417.01
8.0.170.0040.00416.97
8.0.160.0040.00417.11
8.0.150.0040.00417.03
8.0.140.0000.00816.97
8.0.130.0030.00313.34
8.0.120.0000.00716.84
8.0.110.0050.00216.89
8.0.100.0000.00716.99
8.0.90.0030.00616.86
8.0.80.0080.01016.97
8.0.70.0040.00417.05
8.0.60.0040.00417.05
8.0.50.0040.00417.02
8.0.30.0160.00417.07
8.0.20.0080.01117.01
8.0.10.0000.00717.11
8.0.00.0060.01216.88
7.4.330.0020.00216.79
7.4.320.0060.00016.71
7.4.300.0000.00716.62
7.4.290.0040.00416.62
7.4.280.0040.00416.57
7.4.270.0000.00716.46
7.4.260.0030.00313.37
7.4.250.0000.00716.54
7.4.240.0030.00316.57
7.4.230.0020.00516.57
7.4.220.0070.00016.63
7.4.210.0040.01516.67
7.4.200.0070.00016.58
7.4.140.0120.00817.86
7.4.130.0100.00916.68
7.4.120.0090.01416.55
7.4.110.0120.00616.48
7.4.100.0070.01316.46
7.4.90.0160.00316.55
7.4.80.0060.01219.39
7.4.70.0110.00716.39
7.4.60.0060.01216.69
7.4.50.0070.00716.75
7.4.40.0090.00916.51
7.4.10.0030.01916.51
7.4.00.0100.00516.47
7.3.330.0030.00316.28
7.3.320.0020.00213.30
7.3.310.0000.00716.55
7.3.300.0060.00016.40
7.3.290.0120.00516.43
7.3.260.0070.01116.57
7.3.240.0130.00516.49
7.3.230.0100.00616.35
7.3.210.0110.00616.39
7.3.200.0140.00616.66
7.3.190.0100.00716.52
7.3.180.0130.00316.37
7.3.170.0120.00716.74
7.3.160.0100.01116.58
7.3.130.0070.01316.40
7.3.120.0060.01316.62
7.3.110.0070.01016.38
7.3.100.0130.00316.55
7.3.90.0080.00816.38
7.3.80.0060.00916.39
7.3.70.0120.00616.45
7.3.60.0080.01116.55
7.3.50.0180.00016.32
7.3.40.0070.01216.47
7.3.30.0150.00516.45
7.3.20.0100.01016.31
7.3.10.0130.00916.57
7.3.00.0050.01416.46
7.2.330.0060.01216.77
7.2.320.0100.01416.57
7.2.310.0180.00516.70
7.2.300.0170.00716.45
7.2.290.0150.00916.63
7.2.260.0090.00616.71
7.2.250.0030.01316.68
7.2.240.0120.00616.50
7.2.230.0000.01616.59
7.2.220.0070.01016.59
7.2.210.0190.00016.71
7.2.200.0120.00616.68
7.2.190.0100.00916.66
7.2.180.0160.00416.71
7.2.170.0110.00616.73
7.2.160.0100.01716.64
7.2.150.0110.01416.74
7.2.140.0140.00716.56
7.2.130.0140.00716.41
7.2.120.0140.00816.69
7.2.110.0090.00816.57
7.2.100.0050.01116.57
7.2.90.0090.00616.63
7.2.80.0140.00616.71
7.2.70.0120.01316.71
7.2.60.0030.01516.45
7.2.50.0110.00716.46
7.2.40.0140.00416.82
7.2.30.0140.00316.92
7.2.20.0070.01016.79
7.2.10.0120.01216.79
7.2.00.0070.01016.68

preferences:
44.56 ms | 400 KiB | 5 Q