3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "♫"; $len = mb_strlen($string, '8bit'); function substr_unicode($str, $s, $l = null) { return join("", array_slice( preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY), $s, $l)); } echo ord(mb_substr($string, 0, $len))." "; echo chr(171), chr(181);

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)
8.3.60.0110.00316.50
8.3.50.0090.00822.06
8.3.40.0090.01218.75
8.3.30.0110.00419.08
8.3.20.0000.00820.16
8.3.10.0080.00023.48
8.3.00.0080.00019.25
8.2.180.0100.00625.92
8.2.170.0070.01022.96
8.2.160.0110.00420.39
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0140.00726.16
8.2.120.0070.00022.15
8.2.110.0100.00022.23
8.2.100.0080.00417.91
8.2.90.0040.00419.02
8.2.80.0000.00817.97
8.2.70.0060.00317.63
8.2.60.0060.00317.80
8.2.50.0030.00518.07
8.2.40.0040.00418.28
8.2.30.0040.00417.95
8.2.20.0000.00817.67
8.2.10.0070.00018.18
8.2.00.0030.00617.59
8.1.280.0060.00925.92
8.1.270.0030.00522.14
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0080.00023.96
8.1.230.0090.00319.10
8.1.220.0090.00017.76
8.1.210.0040.00418.77
8.1.200.0030.00617.13
8.1.190.0000.00817.52
8.1.180.0040.00418.10
8.1.170.0040.00418.28
8.1.160.0070.00021.89
8.1.150.0040.00418.50
8.1.140.0000.00717.51
8.1.130.0000.00717.75
8.1.120.0000.00717.50
8.1.110.0000.00717.48
8.1.100.0030.00517.33
8.1.90.0050.00317.45
8.1.80.0030.00517.47
8.1.70.0000.00817.46
8.1.60.0030.00717.61
8.1.50.0040.00417.61
8.1.40.0070.00017.59
8.1.30.0060.00317.59
8.1.20.0030.00617.62
8.1.10.0000.00817.61
8.1.00.0030.00517.56
8.0.300.0050.00218.77
8.0.290.0040.00417.16
8.0.280.0050.00218.58
8.0.270.0070.00017.24
8.0.260.0030.00317.20
8.0.250.0030.00317.05
8.0.240.0000.00816.98
8.0.230.0030.00316.97
8.0.220.0030.00316.95
8.0.210.0070.00016.88
8.0.200.0000.00616.97
8.0.190.0040.00417.09
8.0.180.0030.00517.06
8.0.170.0060.00317.02
8.0.160.0030.00516.86
8.0.150.0030.00316.75
8.0.140.0000.00716.79
8.0.130.0080.00013.35
8.0.120.0070.00016.85
8.0.110.0030.00416.94
8.0.100.0040.00416.76
8.0.90.0050.00316.92
8.0.80.0070.01017.00
8.0.70.0000.00717.03
8.0.60.0000.00816.75
8.0.50.0040.00416.93
8.0.30.0050.01416.96
8.0.20.0140.00617.40
8.0.10.0020.00516.89
8.0.00.0120.00516.68
7.4.330.0000.00515.00
7.4.320.0030.00316.52
7.4.300.0030.00316.52
7.4.290.0000.00716.58
7.4.280.0040.00416.46
7.4.270.0040.00416.55
7.4.260.0030.00316.47
7.4.250.0050.00316.43
7.4.240.0020.00516.42
7.4.230.0030.00316.30
7.4.220.0060.01316.39
7.4.210.0040.01016.60
7.4.200.0070.00016.55
7.4.190.0030.00316.68
7.4.160.0030.01316.39
7.4.150.0080.00817.40
7.4.140.0100.01017.86
7.4.130.0080.00916.46
7.4.120.0110.00616.65
7.4.110.0100.00716.43
7.4.100.0040.01416.28
7.4.90.0070.01016.56
7.4.80.0100.01019.39
7.4.70.0090.00616.27
7.4.60.0130.00316.50
7.4.50.0030.00316.18
7.4.40.0060.01022.77
7.4.30.0040.01416.41
7.4.00.0120.00614.84
7.3.330.0050.00013.06
7.3.320.0050.00013.11
7.3.310.0000.00716.23
7.3.300.0030.00316.25
7.3.290.0030.01816.29
7.3.280.0090.00816.23
7.3.270.0040.01617.40
7.3.260.0130.00916.20
7.3.250.0120.00716.36
7.3.240.0030.02016.48
7.3.230.0110.00516.49
7.3.210.0090.01416.26
7.3.200.0100.01019.39
7.3.190.0120.00616.20
7.3.180.0060.01016.61
7.3.170.0060.00916.54
7.3.160.0120.00416.26
7.3.120.0030.00914.74
7.3.10.0000.01416.39
7.3.00.0030.00916.50
7.2.330.0080.00916.73
7.2.320.0140.00716.62
7.2.310.0190.00316.29
7.2.300.0030.01616.44
7.2.290.0040.01216.54
7.2.130.0000.01416.71
7.2.120.0080.00516.55
7.2.110.0080.00416.80
7.2.100.0090.00616.96
7.2.90.0110.00416.86
7.2.80.0100.00716.88
7.2.70.0040.00816.90
7.2.60.0060.00616.89
7.2.50.0070.00317.04
7.2.40.0000.00916.76
7.2.30.0000.00916.84
7.2.20.0130.00316.56
7.2.10.0060.00916.69
7.2.00.0020.01318.08
7.1.250.0030.01015.76
7.1.200.0070.00715.79
7.1.100.0030.00718.07
7.1.70.0000.01216.98
7.1.60.0070.01619.33
7.1.50.0060.00616.87
7.1.00.0130.06722.28
7.0.200.0200.00715.03
7.0.140.0070.06722.18
7.0.60.0100.07720.07
7.0.50.0200.07317.84
7.0.40.0100.08020.02
7.0.30.0370.07320.24
7.0.20.0100.05320.10
7.0.10.0070.08020.25
7.0.00.0030.04720.30
5.6.280.0100.06321.05
5.6.210.0030.04020.72
5.6.200.0130.07718.22
5.6.190.0030.05320.61
5.6.180.3500.04320.33
5.6.170.0270.06320.53
5.6.160.0030.09320.71
5.6.150.0070.04318.29
5.6.140.0100.04318.18
5.6.130.0130.07718.14
5.6.120.0030.04320.72
5.6.110.0100.08720.99
5.6.100.0070.06720.98
5.6.90.0270.06320.98
5.6.80.0000.08720.43
5.5.350.0230.05720.50
5.5.340.0030.05018.04
5.5.330.0000.04320.21
5.5.320.0330.08320.40
5.5.310.0330.05020.52
5.5.300.0030.08017.95
5.5.290.0100.07018.07
5.5.280.0070.04320.65
5.5.270.0200.07320.78
5.5.260.0070.08720.86
5.5.250.0130.07320.46
5.5.240.0300.06720.11
5.4.450.0400.04719.44
5.4.440.0770.03319.52
5.4.430.0730.03319.56
5.4.420.0500.03719.46
5.4.410.0870.03319.42
5.4.400.0700.03319.25
5.4.390.0700.04318.95
5.4.380.0330.05318.78
5.4.370.0530.05718.78
5.4.360.0430.05018.78
5.4.350.0500.05018.74
5.4.340.0300.05718.77
5.4.320.0040.04012.50
5.4.310.0070.04912.50
5.4.300.0080.03412.51
5.4.290.0050.03912.50
5.4.280.0120.04512.37
5.4.270.0100.05612.37
5.4.260.0090.05612.38
5.4.250.0100.05412.37
5.4.240.0090.05412.38
5.4.230.0150.04712.36
5.4.220.0100.04412.37
5.4.210.0080.03612.36
5.4.200.0070.04112.36
5.4.190.0070.03812.36
5.4.180.0060.04312.36
5.4.170.0080.05012.37
5.4.160.0080.03812.36
5.4.150.0080.03712.36
5.4.140.0090.04112.04
5.4.130.0080.03912.03
5.4.120.0070.04011.99
5.4.110.0110.04611.98
5.4.100.0110.04711.98
5.4.90.0060.05511.98
5.4.80.0080.04511.98
5.4.70.0110.04411.98
5.4.60.0080.03611.98
5.4.50.0070.04111.98
5.4.40.0080.04411.97
5.4.30.0120.03911.96
5.4.20.0070.04611.96
5.4.10.0140.04811.97
5.4.00.0080.03711.46
5.3.290.0100.03412.80
5.3.280.0080.04012.70
5.3.270.0160.06912.72
5.3.260.0130.04712.72
5.3.250.0110.03612.72
5.3.240.0110.04412.71
5.3.230.0050.05312.71
5.3.220.0070.04412.68
5.3.210.0060.04612.68
5.3.200.0090.03612.68
5.3.190.0070.03812.68
5.3.180.0080.03512.67
5.3.170.0080.03612.67
5.3.160.0110.03512.67
5.3.150.0040.04512.67
5.3.140.0100.04912.66
5.3.130.0050.04512.66
5.3.120.0070.04812.66
5.3.110.0070.04412.66
5.3.100.0080.05412.12
5.3.90.0130.06112.08
5.3.80.0080.04512.07
5.3.70.0060.03812.07
5.3.60.0060.03812.06
5.3.50.0060.03712.00
5.3.40.0050.03912.00
5.3.30.0100.03611.95
5.3.20.0070.03711.74
5.3.10.0070.05111.70
5.3.00.0090.04011.69
5.2.170.0040.0329.18
5.2.160.0060.0299.19
5.2.150.0050.0339.19
5.2.140.0060.0399.19
5.2.130.0090.0279.15
5.2.120.0050.0319.15
5.2.110.0080.0289.14
5.2.100.0030.0339.15
5.2.90.0060.0299.14
5.2.80.0040.0329.14
5.2.70.0070.0379.14
5.2.60.0040.0459.09
5.2.50.0070.0399.07
5.2.40.0060.0319.04
5.2.30.0060.0309.02
5.2.20.0040.0309.01
5.2.10.0060.0298.91
5.2.00.0070.0298.79
5.1.60.0050.0308.07
5.1.50.0060.0308.07
5.1.40.0050.0278.05
5.1.30.0150.0288.39
5.1.20.0080.0308.43
5.1.10.0070.0368.15
5.1.00.0050.0298.15
5.0.50.0070.0306.62
5.0.40.0030.0356.48
5.0.30.0080.0386.29
5.0.20.0090.0186.27
5.0.10.0030.0256.24
5.0.00.0070.0326.23
4.4.90.0020.0184.78
4.4.80.0060.0174.75
4.4.70.0020.0174.75
4.4.60.0020.0194.75
4.4.50.0020.0194.77
4.4.40.0070.0254.71
4.4.30.0030.0164.76
4.4.20.0030.0194.85
4.4.10.0050.0204.85
4.4.00.0030.0294.76
4.3.110.0050.0204.67
4.3.100.0030.0164.66
4.3.90.0020.0174.64
4.3.80.0030.0264.58
4.3.70.0040.0154.63
4.3.60.0020.0224.63
4.3.50.0050.0234.63
4.3.40.0040.0324.53
4.3.30.0020.0223.29
4.3.20.0020.0173.27
4.3.10.0030.0183.23
4.3.00.0130.01313.47

preferences:
41.62 ms | 401 KiB | 5 Q