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($str)); var_dump(mb_detect_encoding($iso, 'utf-8, iso-8859-1', true));

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)
8.3.60.0070.00716.50
8.3.50.0150.00721.15
8.3.40.0040.01118.54
8.3.30.0090.00618.51
8.3.20.0000.00720.22
8.3.10.0080.00021.73
8.3.00.0000.00819.54
8.2.180.0100.01016.75
8.2.170.0110.00422.96
8.2.160.0150.00320.56
8.2.150.0030.00524.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0090.00017.63
8.2.110.0060.00319.55
8.2.100.0040.00817.84
8.2.90.0000.00819.30
8.2.80.0000.00817.97
8.2.70.0060.00317.63
8.2.60.0040.00418.29
8.2.50.0030.00518.07
8.2.40.0000.00821.22
8.2.30.0040.00418.15
8.2.20.0080.00017.71
8.2.10.0070.00018.25
8.2.00.0040.00418.29
8.1.280.0100.00325.92
8.1.270.0040.00420.36
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0030.00622.18
8.1.230.0110.00419.18
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0030.00617.47
8.1.190.0050.00317.48
8.1.180.0040.00418.10
8.1.170.0050.00318.55
8.1.160.0040.00422.12
8.1.150.0000.00718.94
8.1.140.0040.00417.46
8.1.130.0000.00717.80
8.1.120.0040.00417.57
8.1.110.0030.00517.38
8.1.100.0000.00717.60
8.1.90.0000.00817.53
8.1.80.0040.00417.62
8.1.70.0060.00017.48
8.1.60.0030.00617.58
8.1.50.0000.00817.55
8.1.40.0060.00317.54
8.1.30.0040.00417.72
8.1.20.0000.00717.70
8.1.10.0080.00017.61
8.1.00.0050.00317.71
8.0.300.0000.00718.77
8.0.290.0040.00416.63
8.0.280.0000.00818.49
8.0.270.0030.00517.23
8.0.260.0000.00617.35
8.0.250.0000.00716.89
8.0.240.0060.00516.89
8.0.230.0030.00617.05
8.0.220.0030.00316.95
8.0.210.0070.00316.83
8.0.200.0040.00416.98
8.0.190.0080.00016.94
8.0.180.0040.00416.95
8.0.170.0030.00616.98
8.0.160.0030.00316.99
8.0.150.0080.00416.87
8.0.140.0060.00316.85
8.0.130.0030.00313.41
8.0.120.0000.00816.94
8.0.110.0040.00416.95
8.0.100.0040.00417.00
8.0.90.0000.00716.88
8.0.80.0150.00316.89
8.0.70.0000.00816.80
8.0.60.0000.00716.95
8.0.50.0040.00416.94
8.0.30.0150.00917.21
8.0.20.0060.01617.40
8.0.10.0040.00416.90
8.0.00.0110.01016.70
7.4.330.0000.00515.21
7.4.320.0060.00016.56
7.4.300.0000.00716.54
7.4.290.0030.00316.62
7.4.280.0000.00716.53
7.4.270.0060.00016.45
7.4.260.0070.00016.53
7.4.250.0000.00816.53
7.4.240.0020.00516.54
7.4.230.0030.00316.63
7.4.220.0150.00916.60
7.4.210.0120.00616.67
7.4.200.0070.00016.67
7.4.160.0060.01016.55
7.4.150.0170.00317.40
7.4.140.0120.00717.86
7.4.130.0130.00816.51
7.4.120.0150.00816.56
7.4.110.0100.00716.63
7.4.100.0180.00616.59
7.4.90.0070.01116.49
7.4.80.0150.00419.39
7.4.70.0060.01116.74
7.4.60.0130.00316.57
7.4.50.0000.00816.61
7.4.40.0060.01016.43
7.4.30.0090.00916.52
7.4.00.0060.01214.93
7.3.330.0000.00813.23
7.3.320.0050.00013.07
7.3.310.0000.00716.18
7.3.300.0070.00016.34
7.3.290.0070.00716.32
7.3.280.0120.00816.29
7.3.270.0150.00417.40
7.3.260.0090.00916.41
7.3.250.0110.00816.52
7.3.240.0090.01316.50
7.3.230.0030.01316.39
7.3.210.0080.00816.41
7.3.200.0090.00916.29
7.3.190.0130.00316.38
7.3.180.0060.00916.58
7.3.170.0040.01316.34
7.3.160.0080.00816.56
7.3.120.0070.01414.87
7.3.110.0090.00314.78
7.3.100.0070.00714.95
7.3.90.0070.00715.07
7.3.80.0030.00614.73
7.3.70.0070.00714.90
7.3.60.0030.00614.91
7.3.50.0080.00614.66
7.3.40.0100.00314.96
7.3.30.0070.00315.03
7.3.20.0080.00816.87
7.3.10.0070.00716.72
7.3.00.0030.00816.46
7.2.330.0140.00316.68
7.2.320.0030.01516.62
7.2.310.0090.00816.80
7.2.300.0220.00016.63
7.2.290.0160.00616.50
7.2.250.0070.01414.92
7.2.240.0090.01215.07
7.2.230.0100.00615.04
7.2.220.0080.00615.19
7.2.210.0080.00815.17
7.2.200.0080.00814.95
7.2.190.0030.01415.07
7.2.180.0070.00715.08
7.2.170.0060.00314.98
7.2.00.0150.00019.49
7.1.330.0030.01315.98
7.1.320.0070.00715.75
7.1.310.0070.00716.02
7.1.300.0030.00615.84
7.1.290.0040.00415.84
7.1.280.0040.01115.92
7.1.270.0070.00716.07
7.1.260.0100.00316.00
7.1.100.0030.01018.40
7.1.70.0050.00217.38
7.1.60.0100.01320.03
7.1.50.0000.01316.92
7.1.00.0030.07722.44
7.0.200.0110.00516.81
7.0.60.0130.05321.59
7.0.50.0030.05017.89
7.0.40.0070.04320.08
7.0.30.0600.04320.32
7.0.20.0400.07020.09
7.0.10.0030.04320.12
7.0.00.0030.08720.12
5.6.280.0100.06721.06
5.6.210.0030.06720.71
5.6.200.0070.03718.20
5.6.190.0030.06020.60
5.6.180.3100.04320.27
5.6.170.0400.06020.61
5.6.160.0170.07320.49
5.6.150.0100.04318.15
5.6.140.0070.07718.09
5.6.130.0030.08318.20
5.6.120.0000.08721.04
5.6.110.0070.08021.13
5.6.100.0130.07320.97
5.6.90.0170.07321.03
5.6.80.0070.03720.50
5.5.350.0130.04320.46
5.5.340.0030.05317.84
5.5.330.0130.05020.40
5.5.320.0300.03720.24
5.5.310.0330.07320.32
5.5.300.0130.07317.87
5.5.290.0100.07717.90
5.5.280.0070.04320.96
5.5.270.0030.09320.78
5.5.260.0130.07320.76
5.5.250.0170.06720.45
5.5.240.0130.03720.35
5.4.450.0530.05719.64
5.4.440.0630.04719.23
5.4.430.0600.04719.36
5.4.420.0670.04019.60
5.4.410.0700.05019.41
5.4.400.0730.04719.02
5.4.390.0700.05019.16
5.4.380.0770.04319.18
5.4.370.0800.05719.11
5.4.360.0830.05318.91
5.4.350.0670.05319.17
5.4.340.0500.06019.18
5.4.320.0500.05719.00
5.4.310.0600.04718.91
5.4.300.0430.06019.21
5.4.290.0500.05718.93
5.4.280.0500.06019.13
5.4.270.0600.05718.77
5.4.260.0500.05018.91
5.4.250.0730.04719.30
5.4.240.0700.03719.16
5.4.230.0500.05318.77
5.4.220.0600.05019.17
5.4.210.0500.06719.11
5.4.200.0670.05016.67
5.4.190.0530.05719.09
5.4.180.0500.05719.27
5.4.170.0500.05719.27
5.4.160.0670.03719.27
5.4.150.0470.05719.22
5.4.140.0570.04716.29
5.4.130.0530.04716.38
5.4.120.0530.04716.25
5.4.110.0600.04016.28
5.4.100.0670.04016.46
5.4.90.0730.04316.32
5.4.80.0600.06316.44
5.4.70.0570.05016.29
5.4.60.0600.04716.51
5.4.50.0570.04716.33
5.4.40.0500.05316.47
5.4.30.0530.05316.32
5.4.20.0530.05716.40
5.4.10.0630.04716.58
5.4.00.0570.04715.66

preferences:
38.16 ms | 401 KiB | 5 Q