3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round(strlen($string) / 2, 0); for ($i = 0; $i < $strLengthHalf -$i; $i++) { var_dump($strLength-$i); var_dump($strLengthHalf - $i); $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$strLengthHalf - $i]; } var_dump($substr1); var_dump($substr2); return $string = $substr1.$substr2; } var_dump(reverse('12345'));

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)
8.3.60.0110.00418.30
8.3.50.0130.00521.19
8.3.40.0070.00719.10
8.3.30.0090.00919.21
8.3.20.0070.00020.47
8.3.10.0080.00023.61
8.3.00.0080.00019.63
8.2.180.0070.00716.50
8.2.170.0100.01022.96
8.2.160.0040.01120.53
8.2.150.0000.00724.18
8.2.140.0080.00024.66
8.2.130.0000.00726.16
8.2.120.0070.00019.96
8.2.110.0060.00322.29
8.2.100.0040.00818.09
8.2.90.0040.00419.36
8.2.80.0080.00017.97
8.2.70.0030.00617.63
8.2.60.0050.00317.93
8.2.50.0000.00818.07
8.2.40.0030.00618.34
8.2.30.0000.00718.19
8.2.20.0040.00417.87
8.2.10.0040.00418.11
8.2.00.0020.00517.91
8.1.280.0090.00925.92
8.1.270.0060.00323.96
8.1.260.0000.00726.35
8.1.250.0050.00228.09
8.1.240.0040.00423.95
8.1.230.0040.00820.97
8.1.220.0050.00317.79
8.1.210.0080.00018.77
8.1.200.0090.00017.35
8.1.190.0080.00017.23
8.1.180.0000.00718.10
8.1.170.0070.00718.30
8.1.160.0000.00822.01
8.1.150.0020.00518.88
8.1.140.0050.00317.45
8.1.130.0050.00317.85
8.1.120.0030.00317.49
8.1.110.0000.00717.43
8.1.100.0040.00417.47
8.1.90.0000.00717.45
8.1.80.0040.00417.35
8.1.70.0030.00317.46
8.1.60.0030.00517.68
8.1.50.0000.00817.48
8.1.40.0060.00317.62
8.1.30.0030.00517.71
8.1.20.0030.00517.59
8.1.10.0000.00917.70
8.1.00.0070.00017.50
8.0.300.0040.00418.77
8.0.290.0080.00016.75
8.0.280.0030.00318.49
8.0.270.0000.00817.30
8.0.260.0030.00317.36
8.0.250.0030.00317.14
8.0.240.0000.00716.97
8.0.230.0030.00317.05
8.0.220.0040.00417.04
8.0.210.0000.00617.08
8.0.200.0070.00017.00
8.0.190.0000.00816.93
8.0.180.0050.00216.93
8.0.170.0060.00317.03
8.0.160.0030.00317.05
8.0.150.0000.00816.86
8.0.140.0030.00616.99
8.0.130.0000.00513.38
8.0.120.0000.00816.88
8.0.110.0080.00016.91
8.0.100.0040.00416.83
8.0.90.0000.00716.95
8.0.80.0180.00317.02
8.0.70.0020.00517.09
8.0.60.0050.00216.85
8.0.50.0000.00717.07
8.0.30.0080.01117.03
8.0.20.0110.00817.40
8.0.10.0040.00417.02
8.0.00.0080.01016.82
7.4.330.0000.00515.14
7.4.320.0040.00416.59
7.4.300.0030.00316.58
7.4.290.0030.00316.56
7.4.280.0030.00316.72
7.4.270.0000.00716.61
7.4.260.0040.00416.56
7.4.250.0040.00416.44
7.4.240.0000.00816.66
7.4.230.0000.00716.77
7.4.220.0150.00416.64
7.4.210.0130.00616.65
7.4.200.0070.00016.77
7.4.160.0150.00016.64
7.4.150.0150.00317.40
7.4.140.0160.00517.86
7.4.130.0050.01416.60
7.4.120.0100.01116.66
7.4.110.0140.00616.62
7.4.100.0070.01016.66
7.4.90.0090.00916.64
7.4.80.0070.01019.39
7.4.70.0170.00016.73
7.4.60.0100.00716.74
7.4.50.0000.00416.57
7.4.40.0100.00716.80
7.4.30.0090.00916.73
7.4.00.0090.00814.99
7.3.330.0030.00313.35
7.3.320.0030.00313.44
7.3.310.0030.00316.52
7.3.300.0000.00716.52
7.3.290.0030.01316.51
7.3.280.0110.00516.50
7.3.270.0030.01317.40
7.3.260.0110.00616.45
7.3.250.0100.00616.49
7.3.240.0130.00916.44
7.3.230.0060.01216.48
7.3.210.0140.00416.49
7.3.200.0190.00019.39
7.3.190.0030.01316.45
7.3.180.0030.01316.49
7.3.170.0030.01516.56
7.3.160.0070.01016.46
7.3.120.0060.01214.84
7.3.110.0000.01614.83
7.3.100.0070.01114.68
7.3.90.0090.00014.73
7.3.80.0030.01214.71
7.3.70.0070.01014.95
7.3.60.0060.00914.58
7.3.50.0030.01314.72
7.3.40.0000.01414.47
7.3.30.0100.00314.93
7.3.20.0100.00616.71
7.3.10.0040.01116.75
7.3.00.0070.00716.77
7.2.330.0140.00316.82
7.2.320.0110.00716.86
7.2.310.0130.01016.78
7.2.300.0120.00616.52
7.2.290.0120.00916.76
7.2.250.0040.01415.07
7.2.240.0070.01015.00
7.2.230.0070.01015.09
7.2.220.0080.00515.24
7.2.210.0060.00615.02
7.2.200.0070.00715.11
7.2.190.0120.00615.05
7.2.180.0070.00715.16
7.2.170.0100.00315.13
7.2.60.0070.01016.82
7.2.00.0030.01019.21
7.1.330.0000.01215.75
7.1.320.0080.00515.96
7.1.310.0060.00915.89
7.1.300.0030.01015.69
7.1.290.0040.01115.66
7.1.280.0040.01215.72
7.1.270.0030.01315.95
7.1.260.0030.01015.84
7.1.200.0030.01015.98
7.1.100.0080.00817.98
7.1.70.0000.00717.20
7.1.60.0090.01519.11
7.1.50.0140.01017.11
7.1.00.0030.07322.37
7.0.200.0070.00316.82
7.0.140.0030.07322.05
7.0.60.0100.08719.79
7.0.50.0030.04317.89
7.0.40.0070.04320.05
7.0.30.0330.05720.34
7.0.20.0230.08720.26
7.0.10.0000.04720.24
7.0.00.0130.06020.24
5.6.280.0030.07320.78
5.6.210.0130.05720.47
5.6.200.0070.04018.29
5.6.190.0030.08020.46
5.6.180.0200.08020.40
5.6.170.0270.06720.53
5.6.160.0070.05020.62
5.6.150.0130.07018.16
5.6.140.0000.09018.28
5.6.130.0100.07718.15
5.6.120.0130.03720.90
5.6.110.0070.04321.02
5.6.100.0070.03720.96
5.6.90.0130.03721.01
5.6.80.0200.07320.51
5.6.70.4170.04320.28
5.5.350.0070.06020.44
5.5.340.0130.07717.98
5.5.330.0030.06320.47
5.5.320.0300.04020.41
5.5.310.0430.07720.25
5.5.300.0000.04017.95
5.5.290.0100.07317.92
5.5.280.0030.05320.73
5.5.270.0130.06320.80
5.5.260.0030.06020.98
5.5.250.0070.08720.55
5.5.240.0230.07020.28
5.4.450.0830.07319.63
5.4.440.0600.06319.63
5.4.430.0700.06319.63
5.4.420.0370.05719.69
5.4.410.0430.07319.48
5.4.400.0730.05319.27
5.4.390.0800.06318.98
5.4.380.0100.06019.12
5.4.370.0830.06318.87
5.4.360.0630.07019.02
5.4.350.0670.06319.35
5.4.340.0060.03512.02
5.4.320.0050.03812.50
5.4.310.0070.04212.50
5.4.300.0060.03712.51
5.4.290.0080.03612.50
5.4.280.0090.03412.41
5.4.270.0030.04012.40
5.4.260.0050.03812.40
5.4.250.0050.03912.40
5.4.240.0030.04212.40
5.4.230.0180.06312.39
5.4.220.0100.04912.39
5.4.210.0040.04112.40
5.4.200.0090.04212.39
5.4.190.0060.03712.39
5.4.180.0060.03812.39
5.4.170.0100.04912.39
5.4.160.0070.04012.39
5.4.150.0060.03712.39
5.4.140.0090.03512.07
5.4.130.0180.06012.07
5.4.120.0130.07412.02
5.4.110.0100.04812.02
5.4.100.0090.04012.02
5.4.90.0090.03512.01
5.4.80.0040.03812.02
5.4.70.0080.03912.01
5.4.60.0100.03912.01
5.4.50.0070.03412.01
5.4.40.0060.03512.00
5.4.30.0080.03812.00
5.4.20.0050.03712.00
5.4.10.0030.03912.00
5.4.00.0060.05011.49
5.3.290.0120.05012.80
5.3.280.0060.04012.71
5.3.270.0100.04112.72
5.3.260.0070.04012.72
5.3.250.0060.03912.72
5.3.240.0050.04012.72
5.3.230.0070.04912.71
5.3.220.0050.03712.68
5.3.210.0070.03812.68
5.3.200.0060.03612.68
5.3.190.0030.04012.68
5.3.180.0050.03712.67
5.3.170.0060.03612.67
5.3.160.0050.03712.67
5.3.150.0050.04212.67
5.3.140.0050.03812.66
5.3.130.0030.04612.66
5.3.120.0060.05012.66
5.3.110.0090.04112.66
5.3.100.0030.03912.13
5.3.90.0050.05412.11
5.3.80.0040.04612.10
5.3.70.0120.03512.11
5.3.60.0070.04512.08
5.3.50.0030.05612.02
5.3.40.0070.04812.02
5.3.30.0090.04411.98
5.3.20.0090.04611.76
5.3.10.0100.04611.73
5.3.00.0100.04211.72
5.2.170.0040.0399.23
5.2.160.0070.0329.24
5.2.150.0050.0309.23
5.2.140.0060.0299.23
5.2.130.0020.0329.20
5.2.120.0030.0399.20
5.2.110.0030.0339.20
5.2.100.0030.0309.20
5.2.90.0040.0309.20
5.2.80.0030.0329.20
5.2.70.0030.0329.19
5.2.60.0040.0319.15
5.2.50.0060.0329.12
5.2.40.0060.0289.09
5.2.30.0080.0329.07
5.2.20.0070.0349.06
5.2.10.0050.0288.96
5.2.00.0050.0288.82
5.1.60.0010.0278.11
5.1.50.0040.0258.10
5.1.40.0070.0308.08
5.1.30.0070.0328.44
5.1.20.0060.0248.46
5.1.10.0050.0258.18
5.1.00.0060.0288.18
5.0.50.0080.0236.68
5.0.40.0030.0196.54
5.0.30.0020.0396.34
5.0.20.0010.0236.31
5.0.10.0060.0186.29
5.0.00.0050.0326.29
4.4.90.0050.0204.78
4.4.80.0020.0164.76
4.4.70.0050.0134.75
4.4.60.0020.0164.76
4.4.50.0000.0184.77
4.4.40.0020.0264.71
4.4.30.0020.0194.76
4.4.20.0050.0144.85
4.4.10.0030.0164.85
4.4.00.0020.0264.76
4.3.110.0020.0174.66
4.3.100.0020.0164.66
4.3.90.0000.0224.64
4.3.80.0030.0254.58
4.3.70.0020.0164.63
4.3.60.0020.0164.63
4.3.50.0020.0174.63
4.3.40.0010.0264.54
4.3.30.0020.0163.34
4.3.20.0020.0163.32
4.3.10.0020.0213.28
4.3.00.0170.0206.85

preferences:
64.92 ms | 400 KiB | 5 Q