3v4l.org

run code in 300+ PHP versions simultaneously
<?php function FirstReverse($str) { $length = strlen($str)-1; $rstr = NULL; for ($i = $length; $i > -1; $i--) { $rstr .= $str[$i]; } // code goes here return $rstr; } // keep this function call here // to see how to enter arguments in PHP scroll down echo FirstReverse("test");

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)
8.3.40.0070.00718.87
8.3.30.0100.00319.13
8.3.20.0080.00020.22
8.3.10.0050.00322.09
8.3.00.0040.00422.64
8.2.170.0120.00922.96
8.2.160.0110.00421.00
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0030.00626.16
8.2.120.0080.00019.48
8.2.110.0060.00321.95
8.2.100.0040.00818.03
8.2.90.0040.00419.39
8.2.80.0080.00017.97
8.2.70.0000.01217.50
8.2.60.0040.00418.05
8.2.50.0030.00618.07
8.2.40.0060.00318.16
8.2.30.0040.00418.18
8.2.20.0050.00217.64
8.2.10.0000.00817.63
8.2.00.0030.00517.55
8.1.270.0060.00322.14
8.1.260.0000.00726.35
8.1.250.0080.00028.09
8.1.240.0060.00321.04
8.1.230.0070.00417.64
8.1.220.0000.00817.76
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0040.00417.30
8.1.180.0080.00018.10
8.1.170.0030.00518.41
8.1.160.0050.00221.95
8.1.150.0000.00818.62
8.1.140.0040.00417.30
8.1.130.0000.00817.87
8.1.120.0000.00717.39
8.1.110.0030.00717.41
8.1.100.0040.00417.41
8.1.90.0030.00317.43
8.1.80.0000.00717.31
8.1.70.0000.00717.42
8.1.60.0000.00817.48
8.1.50.0000.00717.52
8.1.40.0000.00717.50
8.1.30.0000.00817.67
8.1.20.0000.00817.66
8.1.10.0040.00417.57
8.1.00.0040.00417.50
8.0.300.0030.00618.77
8.0.290.0060.00316.75
8.0.280.0030.00318.44
8.0.270.0030.00317.19
8.0.260.0000.00616.83
8.0.250.0030.00317.02
8.0.240.0040.00416.95
8.0.230.0030.00316.78
8.0.220.0030.00316.74
8.0.210.0000.00716.82
8.0.200.0030.00316.84
8.0.190.0080.00016.82
8.0.180.0060.00316.86
8.0.170.0000.00716.86
8.0.160.0040.00416.82
8.0.150.0040.00716.86
8.0.140.0000.00716.78
8.0.130.0030.00313.30
8.0.120.0080.00016.75
8.0.110.0070.00016.89
8.0.100.0040.00416.68
8.0.90.0070.00016.82
8.0.80.0090.00916.84
8.0.70.0060.00316.71
8.0.60.0030.00316.75
8.0.50.0000.00716.89
8.0.30.0110.00816.90
8.0.20.0150.00917.40
8.0.10.0050.00316.81
8.0.00.0140.00516.72
7.4.330.0030.00315.09
7.4.320.0060.00016.49
7.4.300.0000.00616.64
7.4.290.0040.00416.51
7.4.280.0000.00716.48
7.4.270.0030.00316.51
7.4.260.0000.00716.40
7.4.250.0060.00316.54
7.4.240.0000.00716.60
7.4.230.0000.00716.67
7.4.220.0030.02616.51
7.4.210.0070.00816.66
7.4.200.0070.00016.55
7.4.190.0050.00316.48
7.4.160.0100.00716.52
7.4.150.0060.01017.40
7.4.140.0060.01417.86
7.4.130.0080.01016.58
7.4.120.0090.00816.65
7.4.110.0090.00916.39
7.4.100.0090.01216.45
7.4.90.0040.01416.39
7.4.80.0130.00319.39
7.4.70.0090.00816.54
7.4.60.0060.01216.57
7.4.50.0000.00716.41
7.4.40.0000.01022.77
7.4.30.0110.00616.60
7.4.00.0060.01114.96
7.3.330.0030.00313.14
7.3.320.0000.00613.38
7.3.310.0030.00316.28
7.3.300.0060.00016.37
7.3.290.0070.01316.37
7.3.280.0050.01116.37
7.3.270.0130.01017.40
7.3.260.0110.00616.54
7.3.250.0090.00816.57
7.3.240.0060.01616.60
7.3.230.0060.01116.41
7.3.210.0100.00716.21
7.3.200.0100.01016.67
7.3.190.0070.01016.29
7.3.180.0080.00816.65
7.3.170.0100.00716.37
7.3.160.0040.01116.36
7.3.120.0050.01214.77
7.3.110.0070.01114.87
7.3.100.0040.01414.53
7.3.90.0070.00714.70
7.3.80.0080.00814.80
7.3.70.0040.00814.93
7.3.60.0000.01314.79
7.3.50.0030.01214.58
7.3.40.0110.00414.94
7.3.30.0060.00614.82
7.3.20.0140.00016.73
7.3.10.0000.01616.37
7.3.00.0060.00616.55
7.2.330.0090.00916.72
7.2.320.0090.00916.45
7.2.310.0040.01816.71
7.2.300.0070.01116.53
7.2.290.0100.00616.50
7.2.250.0060.00915.03
7.2.240.0070.01014.59
7.2.230.0000.01514.95
7.2.220.0070.00715.15
7.2.210.0070.00714.90
7.2.200.0130.00315.23
7.2.190.0120.00614.89
7.2.180.0030.00714.96
7.2.170.0060.00915.13
7.2.00.0070.00719.21
7.1.330.0060.00915.81
7.1.320.0040.00415.86
7.1.310.0030.01215.86
7.1.300.0030.01015.68
7.1.290.0030.01015.61
7.1.280.0040.01115.46
7.1.270.0060.00915.61
7.1.260.0030.01415.70
7.1.100.0070.00718.05
7.1.70.0030.00617.14
7.1.60.0110.01419.82
7.1.50.0030.00717.07
7.1.00.0070.07322.43
7.0.200.0030.00316.42
7.0.140.0070.07022.15
7.0.110.0100.08320.08
7.0.100.0100.08019.95
7.0.90.0030.08319.97
7.0.80.0030.04319.91
7.0.70.0070.08019.96
7.0.60.0100.04720.00
7.0.50.0130.08020.33
7.0.40.0130.07720.23
7.0.30.0130.08020.15
7.0.20.0130.07720.05
7.0.10.0100.06020.26
7.0.00.0070.07320.01
5.6.280.0000.07720.93
5.6.260.0030.06020.67
5.6.250.0100.07020.60
5.6.240.0170.07020.48
5.6.230.0070.05320.66
5.6.220.0000.09020.69
5.6.210.0030.08320.72
5.6.200.0200.07020.96
5.6.190.0100.07021.04
5.6.180.0070.07321.11
5.6.170.0100.07721.29
5.6.160.0100.08020.93
5.6.150.0030.06320.94
5.6.140.0070.07721.14
5.6.130.0100.08020.95
5.6.120.0130.07721.29
5.6.110.0030.07721.26
5.6.100.0130.07721.02
5.6.90.0100.08321.20
5.6.80.0130.07320.48
5.6.70.0030.08320.50
5.6.60.0030.06720.43
5.6.50.0000.08320.46
5.6.40.0030.09020.64
5.6.30.0100.07720.51
5.6.20.0170.07020.57
5.6.10.0030.08320.29
5.6.00.0100.07020.48
5.5.380.0170.07720.36
5.5.370.0100.08020.54
5.5.360.0170.06720.45
5.5.350.0070.05020.42
5.5.340.0170.07720.80
5.5.330.0070.05020.81
5.5.320.0100.08320.96
5.5.310.0130.06721.01
5.5.300.0070.08321.02
5.5.290.0200.06720.99
5.5.280.0030.08720.97
5.5.270.0070.05720.79
5.5.260.0000.05720.86
5.5.250.0030.06320.71
5.5.240.0130.07020.37
5.5.230.0200.07020.16
5.5.220.0030.04320.10
5.5.210.0100.07320.19
5.5.200.0130.07320.14
5.5.190.0270.06720.25
5.5.180.0100.05020.30
5.5.160.0070.07020.22
5.5.150.0070.07720.32
5.5.140.0130.07020.33
5.5.130.0130.06720.25
5.5.120.0130.07720.21
5.5.110.0030.07020.15
5.5.100.0070.08020.21
5.5.90.0070.05320.08
5.5.80.0170.07020.19
5.5.70.0070.06320.16
5.5.60.0100.04320.01
5.5.50.0070.07320.24
5.5.40.0100.07320.20
5.5.30.0070.07320.21
5.5.20.0130.07020.13
5.5.10.0100.04720.11
5.5.00.0100.07319.94
5.4.450.0100.07719.57
5.4.440.0070.08019.51
5.4.430.0100.07719.30
5.4.420.0070.08019.34
5.4.410.0030.06719.18
5.4.400.0030.04318.98
5.4.390.0070.04319.34
5.4.380.0100.08018.98
5.4.370.0100.07719.03
5.4.360.0100.07719.31
5.4.350.0100.07019.17
5.4.340.0000.08319.18
5.4.320.0070.07719.00
5.4.310.0000.08019.23
5.4.300.0100.07319.31
5.4.290.0130.03719.22
5.4.280.0000.06019.26
5.4.270.0070.08018.95
5.4.260.0030.05719.20
5.4.250.0070.08018.98
5.4.240.0030.06719.30
5.4.230.0070.05719.23
5.4.220.0030.07018.98
5.4.210.0170.06319.16
5.4.200.0130.04319.01
5.4.190.0100.06319.08
5.4.180.0100.05718.94
5.4.170.0100.07318.94
5.4.160.0100.07318.96
5.4.150.0130.07018.96
5.4.140.0070.05016.52
5.4.130.0100.06316.38
5.4.120.0030.07716.61
5.4.110.0030.07316.41
5.4.100.0200.06316.43
5.4.90.0200.06016.50
5.4.80.0170.06716.45
5.4.70.0030.07016.24
5.4.60.0070.07016.39
5.4.50.0100.06716.53
5.4.40.0130.07016.28
5.4.30.0100.07016.52
5.4.20.0100.03716.32
5.4.10.0000.08316.38
5.4.00.0100.05315.97
5.3.290.0100.06314.52
5.3.280.0030.07714.72
5.3.270.0130.05714.58
5.3.260.0000.08014.59
5.3.250.0000.05314.83
5.3.240.0130.04014.59
5.3.230.0030.08014.72
5.3.220.0170.06714.54
5.3.210.0100.07314.70
5.3.200.0070.07314.55
5.3.190.0100.07314.55
5.3.180.0170.03714.55
5.3.170.0030.04714.70
5.3.160.0130.06714.65
5.3.150.0030.07714.70
5.3.140.0130.07014.78
5.3.130.0070.06314.63
5.3.120.0070.07714.68
5.3.110.0100.07314.57
5.3.100.0100.04314.05
5.3.90.0000.04014.11
5.3.80.0070.07314.00
5.3.70.0030.05714.14
5.3.60.0070.07314.09
5.3.50.0030.07314.00
5.3.40.0100.06714.02
5.3.30.0070.07014.13
5.3.20.0030.05713.69
5.3.10.0030.07313.73
5.3.00.0030.07313.61
5.2.170.0030.06312.00
5.2.160.0070.06312.00
5.2.150.0170.05312.00
5.2.140.0070.05312.00
5.2.130.0100.03012.00
5.2.120.0030.04312.00
5.2.110.0100.05712.00
5.2.100.0000.03312.00
5.2.90.0100.05012.00
5.2.80.0000.06312.00
5.2.70.0130.04012.00
5.2.60.0070.05712.00
5.2.50.0100.03012.00
5.2.40.0000.03712.00
5.2.30.0070.06312.00
5.2.20.0100.06012.00
5.2.10.0030.05712.00
5.2.00.0070.05012.00
5.1.60.0030.05012.00
5.1.50.0030.02312.00
5.1.40.0030.04012.00
5.1.30.0070.05712.00
5.1.20.0030.06312.00
5.1.10.0100.04712.00
5.1.00.0070.04012.00
5.0.50.0030.04712.00
5.0.40.0030.04012.00
5.0.30.0030.05012.00
5.0.20.0030.03312.00
5.0.10.0000.04712.00
5.0.00.0030.05712.00
4.4.90.0030.03312.00
4.4.80.0000.03012.00
4.4.70.0070.03312.00
4.4.60.0030.03712.00
4.4.50.0000.03712.00
4.4.40.0000.03312.00
4.4.30.0100.02712.00
4.4.20.0030.03312.00
4.4.10.0030.03712.00
4.4.00.0030.04712.00
4.3.110.0000.03312.00
4.3.100.0030.03312.00
4.3.90.0070.03312.00
4.3.80.0000.05712.00
4.3.70.0070.03312.00
4.3.60.0030.03312.00
4.3.50.0030.03712.00
4.3.40.0100.04712.00
4.3.30.0030.03312.00
4.3.20.0000.03712.00
4.3.10.0000.03712.00
4.3.00.0030.03012.00

preferences:
43.16 ms | 400 KiB | 5 Q