3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array(); echo PHP_EOL . ' on empty array: ' . PHP_EOL; var_dump(key($array)); $array[] = 'f'; echo PHP_EOL . ' size one array: ' . PHP_EOL; var_dump(key($array)); echo PHP_EOL . ' within loop: ' . PHP_EOL; foreach ($array as $item) { var_dump(key($array)); } echo PHP_EOL . ' after loop: ' . PHP_EOL; var_dump(key($array)); reset($array); echo PHP_EOL . ' after reset: ' . PHP_EOL; var_dump(key($array)); end($array); echo PHP_EOL . ' after end: ' . PHP_EOL; var_dump(key($array));

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)
8.3.70.0160.00318.55
8.3.60.0060.00918.55
8.3.50.0090.00722.12
8.3.40.0090.00618.53
8.3.30.0040.01119.27
8.3.20.0000.00720.38
8.3.10.0080.00021.90
8.3.00.0040.00422.38
8.2.180.0040.01218.29
8.2.170.0090.00622.96
8.2.160.0090.00520.94
8.2.150.0040.00424.18
8.2.140.0120.00924.66
8.2.130.0080.00026.16
8.2.120.0070.00021.04
8.2.110.0000.01022.44
8.2.100.0120.00019.64
8.2.90.0040.00419.30
8.2.80.0040.00417.97
8.2.70.0060.00317.50
8.2.60.0040.00417.93
8.2.50.0050.00318.07
8.2.40.0100.00018.34
8.2.30.0040.00418.01
8.2.20.0000.00717.62
8.2.10.0000.00817.55
8.2.00.0030.00517.67
8.1.280.0070.01025.92
8.1.270.0040.00423.75
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0040.00423.74
8.1.230.0110.00019.01
8.1.220.0030.00517.74
8.1.210.0060.00318.77
8.1.200.0060.00317.36
8.1.190.0000.00817.40
8.1.180.0040.00418.10
8.1.170.0030.00518.65
8.1.160.0000.00921.98
8.1.150.0070.00318.61
8.1.140.0000.00717.39
8.1.130.0000.00717.88
8.1.120.0030.00417.45
8.1.110.0050.00317.50
8.1.100.0030.00517.39
8.1.90.0040.00417.51
8.1.80.0000.00717.36
8.1.70.0030.00317.46
8.1.60.0030.00617.43
8.1.50.0030.00717.41
8.1.40.0040.00417.40
8.1.30.0040.00417.57
8.1.20.0030.00517.66
8.1.10.0000.00717.38
8.1.00.0040.00417.43
8.0.300.0000.00818.77
8.0.290.0040.00417.15
8.0.280.0000.00718.39
8.0.270.0000.00717.25
8.0.260.0060.00016.80
8.0.250.0070.00016.95
8.0.240.0070.00016.94
8.0.230.0040.00416.98
8.0.220.0000.00716.91
8.0.210.0030.00316.83
8.0.200.0060.00016.93
8.0.190.0040.00416.84
8.0.180.0000.00716.91
8.0.170.0000.00816.93
8.0.160.0040.00416.87
8.0.150.0070.00016.84
8.0.140.0000.00716.84
8.0.130.0030.00313.29
8.0.120.0030.00616.73
8.0.110.0000.00716.83
8.0.100.0030.00516.77
8.0.90.0000.00716.78
8.0.80.0000.01516.92
8.0.70.0000.00816.91
8.0.60.0050.00316.73
8.0.50.0040.00416.76
8.0.30.0080.01117.25
8.0.20.0090.01117.40
8.0.10.0000.00716.89
8.0.00.0100.01116.88
7.4.330.0030.00315.07
7.4.320.0030.00316.63
7.4.300.0030.00316.57
7.4.290.0030.00316.64
7.4.280.0030.00316.50
7.4.270.0070.00016.40
7.4.260.0040.00416.47
7.4.250.0040.00416.60
7.4.240.0040.00416.54
7.4.230.0040.00416.62
7.4.220.0140.00316.54
7.4.210.0080.00716.58
7.4.200.0070.00016.45
7.4.190.0070.00016.65
7.4.160.0050.01116.62
7.4.150.0040.01517.40
7.4.140.0080.00917.86
7.4.130.0130.00516.59
7.4.120.0130.00416.45
7.4.110.0080.00816.57
7.4.100.0080.00816.45
7.4.90.0070.01016.42
7.4.80.0130.01016.36
7.4.70.0100.00716.50
7.4.60.0040.01316.55
7.4.50.0030.00316.31
7.4.40.0040.01222.77
7.4.30.0060.00916.30
7.4.00.0050.01114.95
7.3.330.0000.00513.09
7.3.320.0000.00513.12
7.3.310.0070.00016.16
7.3.300.0000.00616.30
7.3.290.0090.00616.20
7.3.280.0090.00816.25
7.3.270.0080.00817.40
7.3.260.0040.01416.22
7.3.250.0080.01216.46
7.3.240.0070.01016.67
7.3.230.0140.00316.39
7.3.210.0040.01516.45
7.3.200.0180.00319.39
7.3.190.0070.01016.44
7.3.180.0100.00716.24
7.3.170.0060.00916.51
7.3.160.0160.00316.63
7.3.120.0100.00314.86
7.3.110.0110.00715.03
7.3.100.0100.00715.04
7.3.90.0070.01014.58
7.3.80.0100.00614.81
7.3.70.0050.00814.44
7.3.60.0000.01414.66
7.3.50.0000.01714.72
7.3.40.0030.01414.63
7.3.30.0030.00714.63
7.3.20.0030.01016.54
7.3.10.0090.00616.82
7.3.00.0070.00716.65
7.2.330.0030.01416.68
7.2.320.0130.00716.56
7.2.310.0090.01416.77
7.2.300.0180.00016.59
7.2.290.0060.01116.71
7.2.250.0130.00715.14
7.2.240.0060.01214.86
7.2.230.0030.01215.01
7.2.220.0130.00314.93
7.2.210.0070.01315.08
7.2.200.0030.00914.92
7.2.190.0060.00615.25
7.2.180.0070.01114.96
7.2.170.0040.01514.98
7.2.60.0030.01016.66
7.2.00.0060.00619.34
7.1.330.0000.01515.72
7.1.320.0090.00315.81
7.1.310.0130.00615.76
7.1.300.0030.01015.82
7.1.290.0040.00715.67
7.1.280.0110.00415.86
7.1.270.0100.00715.82
7.1.260.0080.00615.47
7.1.200.0090.00615.49
7.1.100.0040.00718.24
7.1.70.0000.00816.97
7.1.60.0060.00919.82
7.1.50.0040.00716.58
7.1.00.0130.06722.54
7.0.200.0040.00416.92
7.0.140.0030.07322.09
7.0.100.0130.05719.98
7.0.90.0270.08019.83
7.0.80.0100.08720.01
7.0.70.0030.05019.91
7.0.60.0030.05019.98
7.0.50.0070.07320.27
7.0.40.0070.08320.05
7.0.30.0130.08020.07
7.0.20.0070.07320.18
7.0.10.0130.06020.04
7.0.00.0100.08320.04
5.6.280.0030.07320.91
5.6.250.0000.08720.67
5.6.240.0070.08320.56
5.6.230.0230.07720.61
5.6.220.0100.08320.60
5.6.210.0070.08320.56
5.6.200.0130.07721.00
5.6.190.0030.09021.03
5.6.180.0070.07720.98
5.6.170.0070.07720.95
5.6.160.0130.03721.08
5.6.150.0070.05021.05
5.6.140.0170.07021.16
5.6.130.0100.07321.13
5.6.120.0170.07320.95
5.6.110.0170.06321.16
5.6.100.0070.08321.01
5.6.90.0070.07721.06
5.6.80.0030.05020.49
5.6.70.0070.06020.48
5.6.60.0170.07020.32
5.6.50.0000.04320.46
5.6.40.0130.05720.41
5.6.30.0030.04320.41
5.6.20.0100.06320.41
5.6.10.0070.07720.30
5.6.00.0100.07720.44
5.5.380.0030.08720.39
5.5.370.0100.04720.32
5.5.360.0000.07020.41
5.5.350.0200.07320.45
5.5.340.0100.07320.88
5.5.330.0030.08320.75
5.5.320.0070.08320.92
5.5.310.0070.08320.88
5.5.300.0100.08320.69
5.5.290.0070.08720.85
5.5.280.0100.07020.91
5.5.270.0070.07720.85
5.5.260.0070.09020.84
5.5.250.0070.07720.56
5.5.240.0130.06320.22
5.5.230.0070.08020.29
5.5.220.0070.08020.14
5.5.210.0100.07320.30
5.5.200.0030.07720.08
5.5.190.0100.07020.14
5.5.180.0130.04320.11
5.5.160.0030.05020.21
5.5.150.0030.07020.23
5.5.140.0130.06720.23
5.5.130.0030.04720.27
5.5.120.0100.07320.26
5.5.110.0030.08020.11
5.5.100.0130.06719.98
5.5.90.0100.07020.09
5.5.80.0130.07020.16
5.5.70.0070.03720.07
5.5.60.0070.07719.93
5.5.50.0070.08020.07
5.5.40.0100.04319.95
5.5.30.0030.06020.04
5.5.20.0000.05020.03
5.5.10.0100.07320.10
5.5.00.0070.07719.93
5.4.450.0070.07719.29
5.4.440.0170.07719.30
5.4.430.0070.08019.13
5.4.420.0100.04319.43
5.4.410.0030.08319.43
5.4.400.0100.04019.04
5.4.390.0130.07019.12
5.4.380.0030.04718.98
5.4.370.0070.06019.23
5.4.360.0030.08019.04
5.4.350.0170.06319.14
5.4.340.0100.06019.09
5.4.320.0070.08319.09
5.4.310.0070.04318.91
5.4.300.0030.07719.02
5.4.290.0100.07718.94
5.4.280.0130.04019.07
5.4.270.0100.06719.09
5.4.260.0100.08019.22
5.4.250.0030.06719.02
5.4.240.0100.04019.05
5.4.230.0070.03719.04
5.4.220.0130.04719.14
5.4.210.0070.08318.96
5.4.200.0070.03719.11
5.4.190.0030.07718.80
5.4.180.0100.07319.11
5.4.170.0100.06719.03
5.4.160.0030.04019.16
5.4.150.0030.07718.95
5.4.140.0070.04316.31
5.4.130.0100.05016.25
5.4.120.0030.06316.32
5.4.110.0030.07716.41
5.4.100.0070.07716.26
5.4.90.0100.07716.32
5.4.80.0030.06716.36
5.4.70.0000.08016.19
5.4.60.0070.04016.41
5.4.50.0070.04316.35
5.4.40.0030.08016.45
5.4.30.0030.07016.32
5.4.20.0070.07316.27
5.4.10.0130.06316.31
5.4.00.0070.07715.74
5.3.290.0070.08314.52
5.3.280.0070.04314.58
5.3.270.0030.08314.44
5.3.260.0030.04714.42
5.3.250.0130.06314.54
5.3.240.0170.06014.60
5.3.230.0070.04014.45
5.3.220.0170.07014.50
5.3.210.0200.05314.43
5.3.200.0000.06014.53
5.3.190.0030.07014.50
5.3.180.0100.06314.42
5.3.170.0030.05314.54
5.3.160.0100.03314.55
5.3.150.0030.03714.57
5.3.140.0000.06314.53
5.3.130.0070.07314.51
5.3.120.0030.05314.48
5.3.110.0070.04014.48
5.3.100.0070.04014.02
5.3.90.0070.06714.01
5.3.80.0070.07013.87
5.3.70.0100.06314.02
5.3.60.0070.07313.97
5.3.50.0100.06713.91
5.3.40.0170.06313.92
5.3.30.0100.06013.87
5.3.20.0070.06713.64
5.3.10.0130.05713.63
5.3.00.0000.05713.63
5.2.170.0130.05711.22
5.2.160.0030.06011.14
5.2.150.0030.06311.08
5.2.140.0030.05311.15
5.2.130.0100.06011.18
5.2.120.0070.06010.93
5.2.110.0070.05311.07
5.2.100.0100.05311.10
5.2.90.0070.05011.07
5.2.80.0030.05710.96
5.2.70.0100.06011.02
5.2.60.0100.06311.01
5.2.50.0030.06311.10
5.2.40.0070.05711.00
5.2.30.0070.04710.97
5.2.20.0030.03010.85
5.2.10.0070.05010.78
5.2.00.0070.03710.73
5.1.60.0000.03010.02
5.1.50.0130.03310.05
5.1.40.0000.04310.00
5.1.30.0030.02710.25
5.1.20.0030.02710.21
5.1.10.0000.03310.09
5.1.00.0030.05710.11
5.0.50.0030.0338.40
5.0.40.0030.0408.41
5.0.30.0030.0508.27
5.0.20.0070.0378.24
5.0.10.0000.0308.06
5.0.00.0030.0608.27
4.4.90.0030.0307.94
4.4.80.0000.0237.94
4.4.70.0000.0177.94
4.4.60.0000.0177.94
4.4.50.0000.0307.94
4.4.40.0030.0337.94
4.4.30.0100.0277.94
4.4.20.0000.0377.94
4.4.10.0000.0437.94
4.4.00.0000.0507.94
4.3.110.0000.0277.94
4.3.100.0000.0207.94
4.3.90.0000.0277.94
4.3.80.0070.0507.94
4.3.70.0030.0277.94
4.3.60.0030.0277.94
4.3.50.0030.0337.94
4.3.40.0030.0477.94
4.3.30.0070.0337.94
4.3.20.0000.0307.94
4.3.10.0100.0177.94
4.3.00.0000.0277.94

preferences:
55.02 ms | 401 KiB | 5 Q