3v4l.org

run code in 300+ PHP versions simultaneously
<?php function str_reverse($string) { if (! is_string ( $string )) { exit ( 'not string' ); } $length = strlen ( $string ); $str_array = str_split ( $string ); $str_reverse = ''; for($i = $length - 1; $i >= 0; $i --) { $str_reverse .= $str_array [$i]; } echo $str_reverse; } $str = 'abcdef ss '; echo str_reverse ( $str );

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)
8.3.40.0100.01018.97
8.3.30.0030.01019.20
8.3.20.0070.00020.16
8.3.10.0070.00021.97
8.3.00.0040.00422.43
8.2.170.0100.00422.96
8.2.160.0070.00719.20
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0140.00026.16
8.2.120.0080.00019.36
8.2.110.0030.00622.33
8.2.100.0150.00017.75
8.2.90.0000.00819.26
8.2.80.0000.00717.97
8.2.70.0080.00317.63
8.2.60.0090.00017.93
8.2.50.0030.00518.07
8.2.40.0050.00319.87
8.2.30.0000.00818.05
8.2.20.0000.00717.73
8.2.10.0040.00417.76
8.2.00.0030.00617.63
8.1.270.0030.00522.20
8.1.260.0000.00726.35
8.1.250.0080.00028.09
8.1.240.0090.00023.80
8.1.230.0110.00019.11
8.1.220.0080.00017.74
8.1.210.0000.00818.77
8.1.200.0060.00317.23
8.1.190.0000.00817.41
8.1.180.0050.00318.74
8.1.170.0030.00518.59
8.1.160.0040.00422.11
8.1.150.0050.00218.65
8.1.140.0040.00417.36
8.1.130.0030.00317.88
8.1.120.0000.00717.39
8.1.110.0050.00317.47
8.1.100.0040.00417.47
8.1.90.0030.00517.50
8.1.80.0030.00517.36
8.1.70.0030.00317.39
8.1.60.0030.00517.45
8.1.50.0040.00417.52
8.1.40.0040.00417.50
8.1.30.0050.00217.66
8.1.20.0030.00517.55
8.1.10.0040.00417.55
8.1.00.0080.00017.46
8.0.300.0080.00018.77
8.0.290.0000.00817.04
8.0.280.0030.00318.45
8.0.270.0000.00716.79
8.0.260.0030.00316.80
8.0.250.0000.00716.84
8.0.240.0030.00616.97
8.0.230.0040.00416.85
8.0.220.0030.00316.87
8.0.210.0070.00016.88
8.0.200.0000.00617.00
8.0.190.0040.00416.87
8.0.180.0000.00716.89
8.0.170.0040.00416.94
8.0.160.0040.00416.91
8.0.150.0030.00316.81
8.0.140.0040.00416.75
8.0.130.0000.00513.32
8.0.120.0050.00316.77
8.0.110.0050.00316.89
8.0.100.0050.00216.89
8.0.90.0040.00416.80
8.0.80.0120.01016.89
8.0.70.0040.00416.90
8.0.60.0040.00416.82
8.0.50.0040.00416.87
8.0.30.0110.00817.17
8.0.20.0080.01017.40
8.0.10.0080.00016.95
8.0.00.0130.00816.71
7.4.330.0060.00015.08
7.4.320.0000.00616.39
7.4.300.0000.00616.59
7.4.290.0030.00316.52
7.4.280.0050.00216.50
7.4.270.0000.00816.67
7.4.260.0070.00016.50
7.4.250.0080.00016.49
7.4.240.0000.00716.47
7.4.230.0030.00316.39
7.4.220.0100.01016.63
7.4.210.0090.00716.61
7.4.200.0070.00016.60
7.4.190.0000.00616.37
7.4.160.0080.00816.57
7.4.150.0130.00417.40
7.4.140.0140.00317.86
7.4.130.0090.01116.44
7.4.120.0110.00716.53
7.4.110.0120.00616.50
7.4.100.0040.01216.60
7.4.90.0120.00916.54
7.4.80.0110.00819.39
7.4.70.0040.01516.49
7.4.60.0260.01716.56
7.4.50.0000.00616.36
7.4.40.0110.00422.77
7.4.30.0200.00016.51
7.4.00.0110.00714.91
7.3.330.0000.00513.21
7.3.320.0000.00513.23
7.3.310.0000.00716.27
7.3.300.0030.00316.39
7.3.290.0140.00716.34
7.3.280.0070.00916.37
7.3.270.0080.00817.40
7.3.260.0180.00616.38
7.3.250.0120.00416.34
7.3.240.0130.00416.32
7.3.230.0150.00316.39
7.3.210.0100.00716.56
7.3.200.0030.01619.39
7.3.190.0030.01516.45
7.3.180.0090.00616.54
7.3.170.0160.00016.64
7.3.160.0030.01216.36
7.3.120.0030.01314.89
7.2.330.0060.01316.55
7.2.320.0130.00416.73
7.2.310.0100.00716.59
7.2.300.0060.00916.85
7.2.290.0040.01216.86
7.2.00.0030.00719.47
7.1.200.0030.00915.97
7.1.100.0000.01118.30
7.1.70.0040.00417.15
7.1.60.0120.01219.82
7.1.50.0130.01017.02
7.1.00.0070.07022.39
7.0.200.0000.00716.69
7.0.140.0070.07021.96
7.0.100.0230.07320.01
7.0.90.0300.03019.97
7.0.80.0000.04319.89
7.0.70.0070.04720.01
7.0.60.0030.04019.96
7.0.50.0030.04020.30
7.0.40.0000.04020.08
7.0.30.0030.04320.19
7.0.20.0030.04319.95
7.0.10.0030.04720.05
7.0.00.0000.05320.04
5.6.280.0100.06721.10
5.6.250.0030.06320.64
5.6.240.0000.07320.76
5.6.230.0030.04320.63
5.6.220.0070.04320.53
5.6.210.0030.04320.61
5.6.200.0030.05020.97
5.6.190.0030.04321.09
5.6.180.0030.03721.09
5.6.170.0170.03021.02
5.6.160.0000.05021.10
5.6.150.0070.03721.08
5.6.140.0070.03021.08
5.6.130.0130.03320.96
5.6.120.0030.04321.08
5.6.110.0000.04021.02
5.6.100.0000.04721.00
5.6.90.0030.08721.03
5.6.80.0130.07020.44
5.6.70.0030.03720.40
5.6.60.0230.06020.33
5.6.50.0000.04020.35
5.6.40.0100.07020.36
5.6.30.0030.08020.38
5.6.20.0070.08020.49
5.6.10.0130.07720.53
5.6.00.0030.08020.45
5.5.380.0200.07020.38
5.5.370.0030.04020.35
5.5.360.0000.04720.39
5.5.350.0000.04320.48
5.5.340.0030.04320.77
5.5.330.0070.03720.89
5.5.320.0000.04720.89
5.5.310.0070.04320.83
5.5.300.0100.02720.64
5.5.290.0000.04720.87
5.5.280.0100.03720.92
5.5.270.0070.04020.77
5.5.260.0070.03320.91
5.5.250.0000.04020.73
5.5.240.0100.07720.18
5.5.230.0000.04319.98
5.5.220.0100.04720.01
5.5.210.0000.05020.11
5.5.200.0100.07720.24
5.5.190.0000.08720.21
5.5.180.0100.07320.16
5.5.160.0130.06720.13
5.5.150.0100.06720.21
5.5.140.0030.07320.07
5.5.130.0200.07020.26
5.5.120.0170.05320.17
5.5.110.0000.05720.27
5.5.100.0100.03719.98
5.5.90.0030.07720.14
5.5.80.0100.07020.07
5.5.70.0100.04320.16
5.5.60.0130.07020.06
5.5.50.0070.07320.09
5.5.40.0130.04020.03
5.5.30.0100.08020.05
5.5.20.0070.06020.15
5.5.10.0100.05020.05
5.5.00.0170.06320.03
5.4.450.0000.04319.35
5.4.440.0030.03319.57
5.4.430.0000.04319.46
5.4.420.0030.03319.48
5.4.410.0030.08019.04
5.4.400.0070.07318.91
5.4.390.0100.07319.18
5.4.380.0070.05719.09
5.4.370.0030.03718.88
5.4.360.0070.07718.85
5.4.350.0030.07719.13
5.4.340.0070.03719.12
5.4.320.0070.05019.05
5.4.310.0270.05718.95
5.4.300.0100.07019.04
5.4.290.0100.08719.04
5.4.280.0100.04019.18
5.4.270.0030.08019.04
5.4.260.0030.05718.87
5.4.250.0030.06019.08
5.4.240.0100.07319.02
5.4.230.0070.06019.04
5.4.220.0170.06019.02
5.4.210.0000.04319.02
5.4.200.0170.03319.03
5.4.190.0100.07019.03
5.4.180.0170.06019.08
5.4.170.0000.08319.20
5.4.160.0070.06019.11
5.4.150.0030.04719.14
5.4.140.0070.06716.43
5.4.130.0100.06016.40
5.4.120.0070.07316.44
5.4.110.0030.03716.58
5.4.100.0000.05316.47
5.4.90.0070.05016.39
5.4.80.0030.07316.49
5.4.70.0100.06716.32
5.4.60.0030.08316.46
5.4.50.0070.07016.48
5.4.40.0100.06716.36
5.4.30.0030.06716.36
5.4.20.0070.07316.46
5.4.10.0170.05716.51
5.4.00.0100.05715.86
5.3.290.0130.07314.72
5.3.280.0070.06014.73
5.3.270.0030.06714.61
5.3.260.0030.08014.57
5.3.250.0070.06314.70
5.3.240.0100.07014.72
5.3.230.0070.04714.62
5.3.220.0070.04014.55
5.3.210.0030.04314.60
5.3.200.0070.07314.69
5.3.190.0030.04314.63
5.3.180.0100.05014.68
5.3.170.0000.07314.54
5.3.160.0070.06314.59
5.3.150.0070.07314.48
5.3.140.0070.07314.61
5.3.130.0070.05014.67
5.3.120.0030.07014.61
5.3.110.0100.07714.56
5.3.100.0000.07314.07
5.3.90.0100.06714.07
5.3.80.0030.07014.13
5.3.70.0100.07313.94
5.3.60.0070.04013.93
5.3.50.0030.07314.00
5.3.40.0000.05014.08
5.3.30.0070.08713.92
5.3.20.0030.08313.62
5.3.10.0070.06313.64
5.3.00.0100.07013.64
5.2.170.0070.06312.61
5.2.160.0000.06712.61
5.2.150.0070.06712.61
5.2.140.0100.05712.61
5.2.130.0000.06012.61
5.2.120.0100.05712.61
5.2.110.0100.05312.61
5.2.100.0030.06312.61
5.2.90.0030.05312.61
5.2.80.0030.06712.61
5.2.70.0070.06312.61
5.2.60.0030.06012.61
5.2.50.0070.04712.61
5.2.40.0100.04012.61
5.2.30.0030.03312.61
5.2.20.0070.05312.61
5.2.10.0030.06012.61
5.2.00.0030.06712.61
5.1.60.0170.05012.61
5.1.50.0030.05312.61
5.1.40.0000.04312.61
5.1.30.0070.05012.61
5.1.20.0100.05012.61
5.1.10.0000.05012.61
5.1.00.0070.03712.61
5.0.50.0070.04712.61
5.0.40.0070.04012.61
5.0.30.0030.05012.61
5.0.20.0070.04312.61
5.0.10.0030.04312.61
5.0.00.0030.05312.61
4.4.90.0030.03312.61
4.4.80.0000.03712.61
4.4.70.0000.02012.61
4.4.60.0070.03312.61
4.4.50.0070.03312.61
4.4.40.0100.04712.61
4.4.30.0000.03712.61
4.4.20.0030.03312.61
4.4.10.0000.02712.61
4.4.00.0070.03712.61
4.3.110.0030.03312.61
4.3.100.0070.02712.61
4.3.90.0070.01712.61
4.3.80.0000.05312.61
4.3.70.0000.01712.61
4.3.60.0030.01712.61
4.3.50.0000.03712.61
4.3.40.0000.04712.61
4.3.30.0000.02012.61
4.3.20.0000.03712.61
4.3.10.0000.04312.61
4.3.00.0030.03712.61

preferences:
44.1 ms | 400 KiB | 5 Q