3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "Narendra"; $strrev = ""; $i = 0; while(isset($str[$i])){ $strrev = $strrev.$str[$i]; $i++; } echo $strrev;

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)
8.3.60.0100.01018.30
8.3.50.0130.00622.04
8.3.40.0070.00718.83
8.3.30.0040.01118.66
8.3.20.0070.00019.34
8.3.10.0000.00821.89
8.3.00.0000.00821.00
8.2.180.0180.00016.50
8.2.170.0070.01022.96
8.2.160.0090.00920.35
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00418.09
8.2.120.0040.00426.35
8.2.110.0110.00019.27
8.2.100.0080.00517.80
8.2.90.0050.00318.94
8.2.80.0050.00317.97
8.2.70.0050.00917.49
8.2.60.0000.00818.05
8.2.50.0080.00018.10
8.2.40.0000.00820.32
8.2.30.0040.00420.63
8.2.20.0050.00217.70
8.2.10.0050.00318.20
8.2.00.0040.00418.02
8.1.280.0000.01825.92
8.1.270.0080.00023.96
8.1.260.0040.00428.09
8.1.250.0040.00428.09
8.1.240.0030.00622.02
8.1.230.0090.00317.51
8.1.220.0000.00717.75
8.1.210.0030.00618.77
8.1.200.0060.00317.25
8.1.190.0060.00317.35
8.1.180.0080.00018.10
8.1.170.0030.00618.41
8.1.160.0080.00019.00
8.1.150.0000.00718.76
8.1.140.0000.00719.56
8.1.130.0000.00717.67
8.1.120.0040.00417.31
8.1.110.0000.00717.28
8.1.100.0030.00417.36
8.1.90.0040.00417.38
8.1.80.0050.00217.43
8.1.70.0030.00317.39
8.1.60.0020.00517.53
8.1.50.0040.00417.34
8.1.40.0040.00417.41
8.1.30.0040.00417.55
8.1.20.0000.00717.57
8.1.10.0030.00517.58
8.1.00.0030.00717.57
8.0.300.0000.00818.77
8.0.290.0050.00516.75
8.0.280.0060.00018.43
8.0.270.0070.00017.29
8.0.260.0040.00417.25
8.0.250.0020.00516.84
8.0.240.0030.00516.95
8.0.230.0030.00316.96
8.0.220.0000.00816.86
8.0.210.0030.00516.82
8.0.200.0000.00916.93
8.0.190.0040.00416.88
8.0.180.0070.00016.97
8.0.170.0040.00416.82
8.0.160.0030.00516.91
8.0.150.0040.00416.84
8.0.140.0040.00416.88
8.0.130.0050.00013.27
8.0.120.0040.00416.76
8.0.110.0000.00716.92
8.0.100.0040.00416.91
8.0.90.0000.00816.95
8.0.80.0000.01516.92
8.0.70.0040.00416.94
8.0.60.0050.00316.93
8.0.50.0040.00416.77
8.0.30.0100.00816.98
8.0.20.0140.00817.40
8.0.10.0000.00716.97
8.0.00.0200.00316.76
7.4.330.0000.00415.08
7.4.320.0000.00616.41
7.4.300.0060.00016.44
7.4.290.0030.00316.42
7.4.280.0040.00416.55
7.4.270.0030.00416.48
7.4.260.0030.00516.28
7.4.250.0000.00716.52
7.4.240.0000.00716.45
7.4.230.0000.00616.43
7.4.220.0110.01216.32
7.4.210.0060.00916.50
7.4.200.0000.00716.37
7.4.160.0110.00716.60
7.4.150.0090.00917.40
7.4.140.0150.01017.86
7.4.130.0080.01316.55
7.4.120.0050.01416.48
7.4.110.0080.00916.41
7.4.100.0140.00316.51
7.4.90.0040.01216.43
7.4.80.0170.00019.39
7.4.70.0150.00316.54
7.4.60.0120.01216.46
7.4.50.0060.00916.22
7.4.40.0110.01116.55
7.4.30.0040.01416.30
7.4.00.0030.00814.94
7.3.330.0030.00413.02
7.3.320.0000.00513.05
7.3.310.0030.00316.31
7.3.300.0000.00716.17
7.3.290.0030.00616.30
7.3.280.0060.01116.32
7.3.270.0140.00317.40
7.3.260.0060.01316.25
7.3.250.0070.01116.53
7.3.240.0100.00716.50
7.3.230.0130.00316.39
7.3.210.0060.01116.46
7.3.200.0070.01416.28
7.3.190.0120.00316.39
7.3.180.0120.00316.33
7.3.170.0090.00916.56
7.3.160.0120.00616.63
7.3.120.0140.00314.63
7.3.110.0160.00314.57
7.3.100.0090.00914.99
7.3.90.0100.00714.71
7.3.80.0090.00614.97
7.3.70.0030.01014.87
7.3.60.0090.00014.95
7.3.50.0060.00914.85
7.3.40.0080.00015.00
7.3.30.0000.00814.70
7.3.20.0060.01216.70
7.3.10.0060.00716.92
7.3.00.0100.00616.58
7.2.330.0120.00616.57
7.2.320.0030.01616.70
7.2.310.0070.01016.52
7.2.300.0060.00916.72
7.2.290.0030.01316.45
7.2.250.0100.01014.99
7.2.240.0030.01715.00
7.2.230.0070.01015.05
7.2.220.0000.01415.27
7.2.210.0060.00615.27
7.2.200.0040.00815.13
7.2.190.0060.01014.96
7.2.180.0120.00615.09
7.2.170.0040.01414.65
7.2.80.0060.00616.40
7.2.60.0040.01117.00
7.2.00.0100.01019.02
7.1.330.0030.01015.70
7.1.320.0000.01715.60
7.1.310.0090.00616.10
7.1.300.0060.00915.80
7.1.290.0040.00415.78
7.1.280.0100.00315.69
7.1.270.0060.00315.95
7.1.260.0070.00715.75
7.1.200.0000.01215.75
7.1.100.0000.01417.98
7.1.70.0000.01316.86
7.1.60.0070.01719.32
7.1.00.0000.08022.45
7.0.200.0250.00614.91
7.0.60.0700.00019.88
7.0.50.0970.00020.25
7.0.40.0830.00020.45
7.0.30.1170.00020.31
7.0.20.0730.00020.43
7.0.10.0900.00020.29
7.0.00.1030.00020.27
5.6.280.0030.07321.11
5.6.210.0670.00020.69
5.6.200.0900.00021.02
5.6.190.0770.00021.02
5.6.180.0970.00021.15
5.6.170.1030.00021.06
5.6.160.0970.00021.06
5.6.150.0900.00021.05
5.6.140.0900.00021.16
5.6.130.1130.00021.07
5.6.120.0730.00021.04
5.6.110.0730.00021.10
5.6.100.0830.00021.01
5.6.90.0830.00021.04
5.6.80.0770.00020.49
5.6.70.0770.00020.41
5.6.60.0870.00020.39
5.6.50.0800.00020.43
5.6.40.0800.00020.47
5.6.30.0830.00020.53
5.6.20.0730.00020.38
5.6.10.0770.00020.46
5.6.00.0930.00020.25
5.5.350.1030.00020.43
5.5.340.0870.00020.95
5.5.330.1030.00021.02
5.5.320.1130.00020.73
5.5.310.0700.00020.83
5.5.300.1200.00020.85
5.5.290.1200.00020.79
5.5.280.0770.00021.03
5.5.270.0830.00020.98
5.5.260.0830.00020.86
5.5.250.0830.00020.69
5.5.240.0800.00020.22
5.5.230.0870.00020.20
5.5.220.0830.00020.23
5.5.210.0770.00020.21
5.5.200.0870.00020.21
5.5.190.0930.00020.13
5.5.180.0930.00020.36
5.5.160.0870.00020.29
5.5.150.0900.00020.16
5.5.140.0870.00020.20
5.5.130.1070.00020.28
5.5.120.0830.00020.34
5.5.110.0830.00020.20
5.5.100.0670.00020.17
5.5.90.0700.00020.06
5.5.80.1030.00020.00
5.5.70.1030.00019.98
5.5.60.0770.00020.11
5.5.50.1100.00020.15
5.5.40.0700.00020.06
5.5.30.0900.00019.98
5.5.20.0830.00020.14
5.5.10.0830.00020.05
5.5.00.0870.00020.13

preferences:
34.64 ms | 401 KiB | 5 Q