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; // 3 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // 7 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // [0x23, 0xfe0f, 0x20e3] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // [1, 3, 3] } 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 3, is 6 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // should 6, is 6 foreach(range(0, mb_strlen($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 [0x23, 0xfe0f, 0x20e3], is [0x0, 0x23, 0x0, 0xf, 0x20, 0x0]; it actually gets kinda close here, if you recompose two by two bytes, but no cigar echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // should be [2, 2, 2], is [1, 1, 1, 1, 1, 1] } 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)
8.3.60.0090.00616.63
8.3.50.0070.01016.68
8.3.40.0090.00618.89
8.3.30.0040.01118.66
8.3.20.0000.00720.85
8.3.10.0040.00423.61
8.3.00.0000.00721.93
8.2.180.0140.00716.38
8.2.170.0110.00722.96
8.2.160.0040.01121.95
8.2.150.0100.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00426.16
8.2.110.0030.00720.96
8.2.100.0120.00017.91
8.2.90.0040.00418.05
8.2.80.0060.00318.73
8.2.70.0000.00817.63
8.2.60.0040.00417.63
8.2.50.0040.00418.04
8.2.40.0060.00318.22
8.2.30.0040.00419.52
8.2.20.0090.00018.14
8.2.10.0040.00419.51
8.2.00.0040.00419.51
8.1.280.0140.00025.92
8.1.270.0030.00620.69
8.1.260.0050.00326.35
8.1.250.0030.00728.09
8.1.240.0050.00522.87
8.1.230.0040.00720.84
8.1.220.0080.00018.69
8.1.210.0030.00618.77
8.1.200.0050.00317.35
8.1.190.0050.00317.13
8.1.180.0000.00718.10
8.1.170.0030.00517.62
8.1.160.0070.00018.92
8.1.150.0040.00418.98
8.1.140.0000.00820.97
8.1.130.0030.00321.92
8.1.120.0040.00417.58
8.1.110.0050.00317.55
8.1.100.0000.00717.46
8.1.90.0000.00717.54
8.1.80.0030.00617.44
8.1.70.0030.00317.54
8.1.60.0040.00417.69
8.1.50.0000.00817.62
8.1.40.0050.00317.52
8.1.30.0050.00317.73
8.1.20.0050.00317.74
8.1.10.0030.00617.62
8.1.00.0000.00817.55
8.0.300.0000.00818.77
8.0.290.0060.00316.88
8.0.280.0030.00318.54
8.0.270.0000.00718.09
8.0.260.0000.00620.15
8.0.250.0030.00316.95
8.0.240.0050.00317.05
8.0.230.0070.00016.92
8.0.220.0030.00317.04
8.0.210.0000.00817.00
8.0.200.0040.00417.02
8.0.190.0000.00716.94
8.0.180.0030.00517.04
8.0.170.0040.00417.05
8.0.160.0000.00717.01
8.0.150.0080.00016.82
8.0.140.0090.00017.01
8.0.130.0030.00313.46
8.0.120.0040.00416.92
8.0.110.0030.00516.88
8.0.100.0030.00516.87
8.0.90.0060.00316.78
8.0.80.0090.00716.95
8.0.70.0060.00317.10
8.0.60.0000.00717.05
8.0.50.0050.00316.81
8.0.30.0080.01217.31
8.0.20.0060.01317.25
8.0.10.0000.00716.91
8.0.00.0060.01216.84
7.4.330.0060.00016.84
7.4.320.0030.00316.62
7.4.300.0000.00616.70
7.4.290.0000.00716.63
7.4.280.0040.00416.54
7.4.270.0070.00016.56
7.4.260.0000.00513.39
7.4.250.0040.00416.55
7.4.240.0070.00016.64
7.4.230.0050.00316.53
7.4.220.0040.00416.58
7.4.210.0040.01116.65
7.4.200.0030.00516.44
7.4.140.0080.01117.86
7.4.130.0110.00916.50
7.4.120.0130.01216.58
7.4.110.0120.00616.76
7.4.100.0050.01416.46
7.4.90.0090.00916.66
7.4.80.0100.01419.39
7.4.70.0090.01216.34
7.4.60.0070.01016.68
7.4.50.0070.01016.66
7.4.40.0100.00716.51
7.4.10.0070.01116.50
7.4.00.0070.01016.45
7.3.330.0040.00416.23
7.3.320.0060.00013.34
7.3.310.0040.00416.30
7.3.300.0040.00416.45
7.3.290.0090.00716.42
7.3.260.0120.00616.74
7.3.240.0080.00916.61
7.3.230.0070.01016.62
7.3.210.0030.01316.34
7.3.200.0150.00316.52
7.3.190.0090.00916.45
7.3.180.0090.00616.50
7.3.170.0000.01716.66
7.3.160.0120.00616.63
7.3.130.0130.01016.29
7.3.120.0060.01216.59
7.3.110.0150.00716.56
7.3.100.0120.00616.36
7.3.90.0130.00616.57
7.3.80.0080.01116.30
7.3.70.0130.00816.37
7.3.60.0080.00816.51
7.3.50.0090.00916.38
7.3.40.0100.00716.42
7.3.30.0100.00716.32
7.3.20.0110.00818.11
7.3.10.0130.00318.14
7.3.00.0110.00718.38
7.2.330.0150.00416.63
7.2.320.0030.01916.65
7.2.310.0100.01416.54
7.2.300.0130.01316.71
7.2.290.0080.01316.67
7.2.260.0130.01016.52
7.2.250.0130.00316.80
7.2.240.0130.00516.69
7.2.230.0100.01016.77
7.2.220.0070.01116.66
7.2.210.0060.01016.47
7.2.200.0040.01216.79
7.2.190.0060.01016.62
7.2.180.0150.00316.57
7.2.170.0060.01316.60
7.2.160.0130.00616.41
7.2.150.0100.00718.45
7.2.140.0150.00318.37
7.2.130.0140.01118.39
7.2.120.0030.01918.30
7.2.110.0120.00618.32
7.2.100.0100.00718.55
7.2.90.0070.01018.46
7.2.80.0070.01018.54
7.2.70.0110.00718.43
7.2.60.0070.01018.27
7.2.50.0060.01118.52
7.2.40.0130.00318.27
7.2.30.0090.00918.55
7.2.20.0120.00618.44
7.2.10.0070.01118.59
7.2.00.0070.01018.38

preferences:
57.73 ms | 400 KiB | 5 Q