3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'false'; $b = isset($a); $c = !empty($a); var_dump($b); var_dump($c);

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)
8.3.60.0150.00716.38
8.3.50.0180.00321.14
8.3.40.0070.00718.60
8.3.30.0060.00918.42
8.3.20.0000.00818.65
8.3.10.0060.00920.29
8.3.00.0040.00423.56
8.2.180.0180.00316.60
8.2.170.0040.01122.96
8.2.160.0060.00920.35
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0060.00326.16
8.2.120.0080.00019.36
8.2.110.0030.00720.94
8.2.100.0080.00417.78
8.2.90.0000.00719.05
8.2.80.0040.00417.97
8.2.70.0080.00317.50
8.2.60.0030.00517.80
8.2.50.0030.00618.07
8.2.40.0080.00318.22
8.2.30.0000.00819.79
8.2.20.0000.00817.65
8.2.10.0050.00319.41
8.2.00.0000.00817.72
8.1.280.0100.00725.92
8.1.270.0000.00723.99
8.1.260.0000.00826.35
8.1.250.0060.00328.09
8.1.240.0060.00620.74
8.1.230.0090.00320.76
8.1.220.0080.00018.77
8.1.210.0030.00619.04
8.1.200.0030.00617.25
8.1.190.0040.00417.41
8.1.180.0000.00818.10
8.1.170.0030.00618.52
8.1.160.0040.00418.94
8.1.150.0030.00518.63
8.1.140.0040.00417.45
8.1.130.0030.00317.68
8.1.120.0050.00217.42
8.1.110.0040.00417.44
8.1.100.0050.00217.46
8.1.90.0040.00417.46
8.1.80.0070.00017.37
8.1.70.0030.00317.39
8.1.60.0000.00817.61
8.1.50.0030.00517.48
8.1.40.0000.00717.54
8.1.30.0000.00717.63
8.1.20.0030.00617.62
8.1.10.0040.00417.44
8.1.00.0000.00817.42
8.0.300.0030.00619.98
8.0.290.0000.00716.75
8.0.280.0030.00318.37
8.0.270.0070.00017.09
8.0.260.0030.00316.75
8.0.250.0040.00416.90
8.0.240.0030.00616.80
8.0.230.0070.00016.94
8.0.220.0040.00416.85
8.0.210.0000.00716.92
8.0.200.0000.00616.89
8.0.190.0040.00416.81
8.0.180.0040.00416.90
8.0.170.0070.00016.87
8.0.160.0070.00016.78
8.0.150.0030.00616.70
8.0.140.0050.00216.68
8.0.130.0080.00013.27
8.0.120.0000.00716.73
8.0.110.0070.00016.85
8.0.100.0000.00716.75
8.0.90.0000.00716.99
8.0.80.0040.01116.80
8.0.70.0040.00416.79
8.0.60.0040.00416.92
8.0.50.0070.00016.91
8.0.30.0150.00716.96
8.0.20.0100.00817.40
8.0.10.0000.00716.95
8.0.00.0150.00516.66
7.4.330.0020.00214.66
7.4.320.0000.00616.50
7.4.300.0000.00616.50
7.4.290.0030.00316.53
7.4.280.0030.00516.34
7.4.270.0000.00716.48
7.4.260.0030.00313.19
7.4.250.0070.00016.54
7.4.240.0060.00016.50
7.4.230.0040.00416.47
7.4.220.0120.00916.39
7.4.210.0070.00716.46
7.4.200.0000.00716.64
7.4.190.0070.00016.37
7.4.160.0040.01216.63
7.4.150.0100.01417.40
7.4.140.0080.01317.86
7.4.130.0100.00816.49
7.4.120.0080.01216.47
7.4.110.0130.00516.50
7.4.100.0090.01316.43
7.4.90.0080.01116.63
7.4.80.0140.00619.37
7.4.70.0060.00916.32
7.4.60.0130.00616.46
7.4.50.0040.00416.65
7.4.40.0090.00622.27
7.4.30.0080.01516.46
7.4.00.0090.00815.02
7.3.330.0030.00312.88
7.3.320.0030.00313.07
7.3.310.0030.00315.97
7.3.300.0030.00316.04
7.3.290.0090.00616.20
7.3.280.0120.00416.11
7.3.270.0150.00617.40
7.3.260.0100.00618.24
7.3.250.0170.00316.35
7.3.240.0120.00416.16
7.3.230.0030.01316.39
7.3.210.0070.01016.08
7.3.200.0040.01919.39
7.3.190.0100.01316.42
7.3.180.0110.00416.36
7.3.170.0100.00716.27
7.3.160.0050.01116.54
7.3.120.0060.01214.76
7.3.110.0040.01114.73
7.3.100.0040.01214.85
7.3.90.0060.01214.69
7.3.80.0060.00614.84
7.3.70.0110.00414.46
7.3.60.0090.00014.77
7.3.50.0060.00614.58
7.3.40.0060.00914.77
7.3.30.0070.00714.59
7.3.20.0060.00616.74
7.3.10.0030.01016.51
7.3.00.0030.01016.45
7.2.330.0060.01216.43
7.2.320.0140.00316.56
7.2.310.0110.00716.48
7.2.300.0120.00616.43
7.2.290.0130.00616.25
7.2.250.0060.01215.14
7.2.240.0100.00614.61
7.2.230.0040.01115.08
7.2.220.0030.01414.83
7.2.210.0100.00715.06
7.2.200.0030.01214.63
7.2.190.0040.01114.95
7.2.180.0030.01014.86
7.2.170.0070.01114.77
7.2.00.0120.01219.10
7.1.330.0000.01415.62
7.1.320.0060.00615.72
7.1.310.0030.01015.82
7.1.300.0060.00915.48
7.1.290.0060.00615.58
7.1.280.0030.01215.84
7.1.270.0120.00315.85
7.1.260.0070.01015.75
7.1.100.0170.00018.11
7.1.70.0000.00817.21
7.1.60.0090.01619.40
7.1.50.0130.00016.90
7.1.00.0070.06022.36
7.0.200.0000.00816.71
7.0.140.0070.06722.21
7.0.70.4400.03719.91
7.0.60.4830.03319.73
7.0.50.4870.04320.27
7.0.40.4430.03720.15
7.0.30.4200.04320.13
7.0.20.3570.04319.96
7.0.10.4200.04320.09
7.0.00.3970.04320.07
5.6.280.0100.06721.14
5.6.210.3970.03320.56
5.6.200.4230.04021.00
5.6.190.3900.04021.11
5.6.180.4170.04720.93
5.6.170.4000.04321.10
5.6.160.4270.03721.13
5.6.150.4300.04320.95
5.6.140.4100.04720.99
5.6.130.4070.04321.05
5.6.120.4130.04320.95
5.6.110.3900.03320.99
5.6.100.3330.04021.09
5.6.90.3870.04721.14
5.6.80.4270.04320.31
5.6.70.4400.03720.54
5.6.60.4030.04020.37
5.6.50.3130.03320.55
5.6.40.3200.02720.37
5.6.30.3030.02720.39
5.6.20.3730.03720.45
5.6.10.2670.03020.28
5.6.00.2470.04020.45
5.5.350.2130.03720.35
5.5.340.4330.03720.74
5.5.330.4330.03720.60
5.5.320.3770.03320.82
5.5.310.4400.03720.78
5.5.300.4370.04020.82
5.5.290.4370.04020.81
5.5.280.4130.04720.90
5.5.270.4070.04320.71
5.5.260.3600.04020.62
5.5.250.4330.04020.68
5.5.240.4070.04020.30
5.5.230.3770.04020.18
5.5.220.3770.04020.20
5.5.210.3400.04020.14
5.5.200.2830.03720.28
5.5.190.3370.04320.19
5.5.180.3470.04720.27
5.5.160.2830.02020.19
5.5.150.3270.03720.25
5.5.140.3170.03320.10
5.5.130.2730.03020.25
5.5.120.3730.03320.22
5.5.110.3500.03320.09
5.5.100.4430.04019.96
5.5.90.3930.03720.05
5.5.80.4030.02720.16
5.5.70.4030.03720.05
5.5.60.3770.04020.01
5.5.50.4000.03319.99
5.5.40.3930.03720.04
5.5.30.4270.04319.98
5.5.20.0070.07720.06
5.5.10.2230.05719.91
5.5.00.4400.03720.00
5.4.450.4400.03719.11
5.4.440.4430.03719.40
5.4.430.4130.03719.44
5.4.420.4400.03719.37
5.4.410.4370.03719.17
5.4.400.4400.03319.07
5.4.390.3570.03719.02
5.4.380.4300.03718.97
5.4.370.3170.03319.13
5.4.360.2800.02718.98
5.4.350.3530.03719.03
5.4.340.3500.03718.96
5.4.320.2970.03018.98
5.4.310.3170.03018.92
5.4.300.3130.03319.25
5.4.290.3230.03718.98
5.4.280.4000.03019.02
5.4.270.3730.03719.23
5.4.260.3970.03719.09
5.4.250.4200.03319.04
5.4.240.4370.04019.02
5.4.230.4330.03719.14
5.4.220.4230.04019.02
5.4.210.4230.04019.11
5.4.200.4470.03018.89
5.4.190.0130.06719.02
5.4.180.0130.06719.04
5.4.170.4300.04019.05
5.4.160.4400.03718.78
5.4.150.4400.03718.95
5.4.140.4030.02716.24
5.4.130.4100.03716.21
5.4.120.4300.03716.30
5.4.110.4130.04016.36
5.4.100.4370.03316.31
5.4.90.3300.04316.23
5.4.80.0130.06016.39
5.4.70.4170.04016.31
5.4.60.4330.03316.38
5.4.50.4330.03716.19
5.4.40.4230.03716.25
5.4.30.4400.03716.39
5.4.20.4400.03316.20
5.4.10.4270.03716.18
5.4.00.4200.03015.78
5.3.290.3470.03714.64
5.3.280.4370.03714.57
5.3.270.3930.03014.61
5.3.260.3970.03714.45
5.3.250.4300.03714.55
5.3.240.4270.03714.55
5.3.230.4430.03014.50
5.3.220.4270.03314.39
5.3.210.3630.04014.54
5.3.200.4100.03714.51
5.3.190.0100.07014.55
5.3.180.0070.07714.55
5.3.170.3130.04014.54
5.3.160.4230.04014.38
5.3.150.3830.04014.38
5.3.140.4170.04014.52
5.3.130.4270.03014.49
5.3.120.4300.03314.40
5.3.110.3670.03314.37
5.3.100.4170.04014.02
5.3.90.3800.04314.00
5.3.80.4330.03713.97
5.3.70.4130.03313.79
5.3.60.3930.03713.95
5.3.50.4270.03713.79
5.3.40.3870.03313.90
5.3.30.4200.04013.91
5.3.20.3970.03313.63
5.3.10.3670.03713.43
5.3.00.4270.04013.49
5.2.170.3700.03010.93
5.2.160.3700.03311.16
5.2.150.4170.04011.00
5.2.140.3770.03011.14
5.2.130.3430.02711.02
5.2.120.3770.02310.96
5.2.110.3800.02710.96
5.2.100.3370.02711.11
5.2.90.3630.03010.96
5.2.80.3600.02711.09
5.2.70.3470.02711.05
5.2.60.3600.03311.05
5.2.50.3700.02711.05
5.2.40.3130.03011.04
5.2.30.3000.03010.98
5.2.20.2600.03010.95
5.2.10.3070.02710.91
5.2.00.3000.02310.62
5.1.60.2600.02310.05
5.1.50.2930.02310.04
5.1.40.3130.0239.97
5.1.30.3030.03010.26
5.1.20.3000.02310.25
5.1.10.3030.02710.07
5.1.00.3070.02710.11
5.0.50.1830.0208.59
5.0.40.1530.0208.40
5.0.30.1670.0308.22
5.0.20.1770.0138.22
5.0.10.1800.0178.25
5.0.00.1670.0338.25
4.4.90.1370.0205.84
4.4.80.1700.0175.81
4.4.70.1670.0175.77
4.4.60.1770.0175.82
4.4.50.1800.0175.88
4.4.40.1700.0275.79
4.4.30.1500.0175.77
4.4.20.1700.0175.79
4.4.10.1730.0135.84
4.4.00.1800.0205.86
4.3.110.1730.0135.78
4.3.100.1230.0205.78
4.3.90.1800.0135.78
4.3.80.1530.0235.78
4.3.70.1670.0205.78
4.3.60.1700.0205.78
4.3.50.1770.0175.78
4.3.40.1700.0235.78
4.3.30.0970.0205.78
4.3.20.0900.0175.78
4.3.10.0670.0275.78
4.3.00.0630.0175.78

preferences:
46.31 ms | 401 KiB | 5 Q