3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'ä€'; var_dump(strlen($str)); var_dump(mb_detect_encoding($str, 'auto', true)); $iso = mb_convert_encoding($str, 'iso-8859-1', 'utf-8'); var_dump(strlen($str)); var_dump($str); var_dump(mb_detect_encoding($iso, 'utf-8, iso-8859-1', true)); $utf8 = mb_convert_encoding($iso, 'utf-8', 'iso-8859-1'); $utf8 = mb_convert_encoding($utf8, 'utf-8', iso-8859-1);

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)
8.3.60.0060.00916.75
8.3.50.0070.01116.50
8.3.40.0070.00718.79
8.3.30.0130.00318.76
8.3.20.0030.00520.18
8.3.10.0000.00721.60
8.3.00.0050.00319.69
8.2.180.0120.00618.55
8.2.170.0060.01222.96
8.2.160.0030.01020.44
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0060.00317.75
8.2.110.0130.00421.25
8.2.100.0030.00918.03
8.2.90.0050.00319.30
8.2.80.0080.00018.00
8.2.70.0090.00017.87
8.2.60.0050.00318.18
8.2.50.0040.00418.07
8.2.40.0050.00321.26
8.2.30.0000.00718.24
8.2.20.0040.00417.85
8.2.10.0040.00418.36
8.2.00.0000.00718.23
8.1.280.0110.00725.92
8.1.270.0040.00420.27
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0060.00322.19
8.1.230.0090.00319.00
8.1.220.0040.00417.89
8.1.210.0040.00418.77
8.1.200.0030.00617.73
8.1.190.0080.00017.71
8.1.180.0000.00818.10
8.1.170.0050.00318.84
8.1.160.0000.00722.23
8.1.150.0040.00418.99
8.1.140.0080.00017.64
8.1.130.0030.00317.76
8.1.120.0050.00217.61
8.1.110.0050.00317.63
8.1.100.0040.00417.60
8.1.90.0030.00417.61
8.1.80.0030.00617.56
8.1.70.0000.00717.53
8.1.60.0090.00017.78
8.1.50.0050.00217.75
8.1.40.0040.00417.68
8.1.30.0030.00517.80
8.1.20.0040.00417.83
8.1.10.0080.00017.80
8.1.00.0000.00717.77
8.0.300.0000.00820.12
8.0.290.0040.00416.88
8.0.280.0030.00318.57
8.0.270.0030.00317.34
8.0.260.0000.00617.29
8.0.250.0000.00817.16
8.0.240.0090.00017.05
8.0.230.0030.00717.01
8.0.220.0000.00716.98
8.0.210.0070.00317.12
8.0.200.0000.00817.13
8.0.190.0050.00317.15
8.0.180.0000.00717.10
8.0.170.0040.00417.13
8.0.160.0040.00417.13
8.0.150.0080.00317.03
8.0.140.0060.00317.10
8.0.130.0060.00013.53
8.0.120.0040.00417.06
8.0.110.0000.00716.99
8.0.100.0000.00717.13
8.0.90.0030.00517.08
8.0.80.0090.00617.00
8.0.70.0050.00217.12
8.0.60.0080.00017.09
8.0.50.0040.00417.14
8.0.30.0120.00717.28
8.0.20.0130.00817.40
8.0.10.0040.00417.02
8.0.00.0100.00816.94
7.4.330.0030.00315.22
7.4.320.0040.00416.64
7.4.300.0000.00616.63
7.4.290.0030.00316.64
7.4.280.0040.00416.63
7.4.270.0040.00416.62
7.4.260.0070.00016.70
7.4.250.0040.00416.49
7.4.240.0030.00316.64
7.4.230.0040.00416.69
7.4.220.0140.01016.80
7.4.210.0030.01016.55
7.4.200.0030.00516.63
7.4.160.0060.00916.43
7.4.150.0110.00717.40
7.4.140.0110.00917.86
7.4.130.0100.01016.53
7.4.120.0110.00916.73
7.4.110.0140.01016.59
7.4.100.0090.00916.62
7.4.90.0130.00616.70
7.4.80.0030.01319.39
7.4.70.0080.00816.64
7.4.60.0030.01316.63
7.4.50.0000.00816.40
7.4.40.0120.00416.54
7.4.30.0110.00616.65
7.4.00.0040.01415.18
7.3.330.0000.00813.29
7.3.320.0060.00013.30
7.3.310.0060.00316.32
7.3.300.0030.00316.46
7.3.290.0090.00716.45
7.3.280.0090.00616.46
7.3.270.0110.00517.40
7.3.260.0120.00416.53
7.3.250.0080.01016.53
7.3.240.0160.00616.51
7.3.230.0120.00616.57
7.3.210.0070.00816.42
7.3.200.0120.01316.50
7.3.190.0050.01116.59
7.3.180.0090.00616.50
7.3.170.0120.00616.58
7.3.160.0060.01316.61
7.2.330.0030.01516.66
7.2.320.0150.00416.74
7.2.310.0160.00616.84
7.2.300.0130.00416.54
7.2.290.0120.00916.56
7.2.60.0040.01117.10
7.2.00.0000.01219.59
7.1.200.0000.01216.10
7.1.100.0110.00018.03
7.1.70.0030.01017.02
7.1.60.0040.01820.03
7.1.50.0000.01417.04
7.1.00.0000.07722.45
7.0.200.0060.00616.97
7.0.60.0100.06719.95
7.0.50.0000.04317.68
7.0.40.0000.09320.00
7.0.30.0500.06320.17
7.0.20.0270.07020.13
7.0.10.0300.07720.30
7.0.00.0000.08720.11
5.6.280.0030.05321.07
5.6.210.0070.08020.66
5.6.200.0130.03018.13
5.6.190.0070.08720.45
5.6.180.0000.04320.32
5.6.170.0430.06720.51
5.6.160.0070.05320.45
5.6.150.0130.04718.11
5.6.140.0000.07318.21
5.6.130.0030.04018.18
5.6.120.0200.03720.98
5.6.110.0000.09721.04
5.6.100.0030.04321.13
5.6.90.0070.07720.97
5.6.80.0170.06720.40
5.5.350.0030.04720.41
5.5.340.0100.06717.91
5.5.330.0100.07720.13
5.5.320.0130.08020.18
5.5.310.0230.06720.25
5.5.300.0100.06017.96
5.5.290.0170.07317.96
5.5.280.0030.04320.95
5.5.270.0070.06320.76
5.5.260.0070.05020.64
5.5.250.0000.05020.58
5.5.240.0070.07720.15
5.4.450.0470.06319.23
5.4.440.0630.06019.63
5.4.430.0130.05319.61
5.4.420.0200.07019.11
5.4.410.0600.03719.11
5.4.400.0670.05019.12
5.4.390.0630.05318.80
5.4.380.0500.06019.08
5.4.370.0470.05019.21
5.4.360.0670.05319.22
5.4.350.0130.05319.30
5.4.340.0300.05718.91
5.4.320.0170.05319.27
5.4.310.0130.05319.22
5.4.300.0500.05019.21
5.4.290.0200.05019.18
5.4.280.0130.05318.95
5.4.270.0270.05019.14
5.4.260.0170.05719.16
5.4.250.0070.06018.77
5.4.240.0170.04719.27
5.4.230.0170.05019.11
5.4.220.0300.04718.99
5.4.210.0200.05718.94
5.4.200.0130.05016.75
5.4.190.0170.04718.95
5.4.180.0300.04719.13
5.4.170.0200.05019.05
5.4.160.0070.06318.93
5.4.150.0330.04019.22
5.4.140.0230.05716.48
5.4.130.0070.06016.43
5.4.120.0170.04316.50
5.4.110.0370.03316.42
5.4.100.0130.05016.34
5.4.90.0300.04016.43
5.4.80.0070.05716.24
5.4.70.0170.04316.25
5.4.60.0230.04716.35
5.4.50.0300.04716.31
5.4.40.0330.04316.38
5.4.30.0530.06316.21
5.4.20.0600.05316.18
5.4.10.0330.05316.38
5.4.00.0130.05315.88

preferences:
61.05 ms | 400 KiB | 5 Q