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; // 2 echo 'BYTE COUNT: ', mb_strlen($string, '8bit'), PHP_EOL; // 8 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // [0x1f1f7, 0x1f1f4] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // [4, 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 2, is 4 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // should be 8, is 8 foreach(range(0, mb_strlen($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 [0x1f1f7, 0x1f1f4], is [0x0, 0x0, 0x0, 0x0] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // should be [4, 4], is [2, 2, 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)
8.3.60.0040.01116.50
8.3.50.0060.00816.26
8.3.40.0070.00718.47
8.3.30.0060.00918.55
8.3.20.0070.00020.77
8.3.10.0050.00323.71
8.3.00.0080.00023.53
8.2.180.0140.00716.63
8.2.170.0110.00422.96
8.2.160.0040.01122.09
8.2.150.0060.00324.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0050.00226.16
8.2.110.0060.00322.30
8.2.100.0040.00719.58
8.2.90.0040.00417.75
8.2.80.0050.00318.81
8.2.70.0040.00418.03
8.2.60.0040.00418.03
8.2.50.0000.00819.30
8.2.40.0050.00519.32
8.2.30.0080.00019.43
8.2.20.0080.00318.15
8.2.10.0040.00419.47
8.2.00.0000.00719.30
8.1.270.0080.00020.74
8.1.260.0050.00326.35
8.1.250.0060.00328.09
8.1.240.0030.01323.72
8.1.230.0120.00020.83
8.1.220.0000.00817.79
8.1.210.0000.00818.77
8.1.200.0080.00317.38
8.1.190.0060.00317.25
8.1.180.0040.00419.02
8.1.170.0000.00818.50
8.1.160.0040.00418.95
8.1.150.0000.00719.04
8.1.140.0000.00720.77
8.1.130.0030.00321.96
8.1.120.0040.00417.55
8.1.110.0040.00417.55
8.1.100.0040.00417.61
8.1.90.0000.00817.57
8.1.80.0000.00717.51
8.1.70.0030.00317.53
8.1.60.0000.00817.71
8.1.50.0090.00017.50
8.1.40.0000.00917.64
8.1.30.0050.00217.79
8.1.20.0030.00517.80
8.1.10.0000.00817.63
8.1.00.0000.00817.51
8.0.300.0040.00418.77
8.0.290.0080.00016.75
8.0.280.0050.00318.61
8.0.270.0040.00416.93
8.0.260.0030.00320.16
8.0.250.0000.00717.02
8.0.240.0030.00317.05
8.0.230.0000.00716.98
8.0.220.0000.00716.98
8.0.210.0070.00017.03
8.0.200.0000.00717.07
8.0.190.0040.00417.04
8.0.180.0080.00016.90
8.0.170.0060.00316.89
8.0.160.0070.00017.09
8.0.150.0000.00816.96
8.0.140.0030.00516.79
8.0.130.0030.00313.46
8.0.120.0040.00416.82
8.0.110.0000.00716.87
8.0.100.0040.00416.92
8.0.90.0000.00916.98
8.0.80.0060.01216.99
8.0.70.0040.00416.90
8.0.60.0000.00716.92
8.0.50.0030.00516.78
8.0.30.0110.01417.07
8.0.20.0030.02117.03
8.0.10.0000.00717.06
8.0.00.0100.00716.76
7.4.330.0030.00316.74
7.4.320.0060.00016.51
7.4.300.0000.00716.59
7.4.290.0030.00316.70
7.4.280.0000.00716.53
7.4.270.0030.00316.45
7.4.260.0000.00613.36
7.4.250.0030.00316.66
7.4.240.0030.00316.61
7.4.230.0040.00416.61
7.4.220.0020.00516.54
7.4.210.0110.00816.68
7.4.200.0050.00316.72
7.4.140.0100.00717.86
7.4.130.0110.00716.58
7.4.120.0150.01216.54
7.4.110.0070.01016.57
7.4.100.0130.00516.59
7.4.90.0030.01516.54
7.4.80.0100.01019.39
7.4.70.0070.01016.43
7.4.60.0000.01716.61
7.4.50.0070.01116.64
7.4.40.0040.01416.77
7.4.10.0100.00716.55
7.4.00.0160.00016.46
7.3.330.0060.00316.23
7.3.320.0050.00013.09
7.3.310.0000.00716.27
7.3.300.0000.00616.36
7.3.290.0060.00816.38
7.3.260.0060.01216.56
7.3.240.0110.00716.51
7.3.230.0130.00616.61
7.3.210.0170.00016.70
7.3.200.0080.00816.63
7.3.190.0080.01616.61
7.3.180.0090.00616.63
7.3.170.0090.00916.61
7.3.160.0110.00716.63
7.3.130.0060.00916.52
7.3.120.0120.01216.64
7.3.110.0130.01016.34
7.3.100.0090.01216.46
7.3.90.0000.01616.64
7.3.80.0070.00716.46
7.3.70.0100.00716.52
7.3.60.0080.00816.59
7.3.50.0090.00616.38
7.3.40.0040.01116.38
7.3.30.0120.00316.38
7.3.20.0090.00916.33
7.3.10.0150.00516.65
7.3.00.0060.01016.49
7.2.330.0100.01016.67
7.2.320.0090.00616.71
7.2.310.0100.01616.82
7.2.300.0040.01516.75
7.2.290.0040.01416.73
7.2.260.0070.01016.55
7.2.250.0120.01216.64
7.2.240.0190.00316.85
7.2.230.0090.00916.67
7.2.220.0060.00916.71
7.2.210.0000.01716.73
7.2.200.0130.00416.53
7.2.190.0030.01216.62
7.2.180.0000.01516.39
7.2.170.0050.01016.48
7.2.160.0120.00616.70
7.2.150.0180.00416.83
7.2.140.0100.00616.69
7.2.130.0060.01016.89
7.2.120.0280.00016.77
7.2.110.0120.00516.81
7.2.100.0140.00716.62
7.2.90.0130.00316.73
7.2.80.0070.00716.78
7.2.70.0110.00616.66
7.2.60.0030.01716.61
7.2.50.0070.01016.76
7.2.40.0080.00816.66
7.2.30.0070.01416.74
7.2.20.0110.00716.82
7.2.10.0150.00416.54
7.2.00.0070.01316.61

preferences:
66.1 ms | 400 KiB | 5 Q