3v4l.org

run code in 300+ PHP versions simultaneously
<?php $discoveredAt; if (isset($discoveredAt)) { echo "Set as Null" . PHP_EOL; } else { echo "Not set: NULL" . PHP_EOL; } $discoveredAt = ""; if (isset($discoveredAt)) { echo "Set as empty string" . PHP_EOL; } else { echo "Not set: empty string" . PHP_EOL; }

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)
8.3.60.0130.00716.38
8.3.50.0090.01121.18
8.3.40.0090.00618.62
8.3.30.0070.00718.80
8.3.20.0040.00422.09
8.3.10.0000.00721.90
8.3.00.0060.00317.25
8.2.180.0140.00718.16
8.2.170.0070.00722.96
8.2.160.0070.01020.52
8.2.150.0080.00024.18
8.2.140.0070.00024.66
8.2.130.0100.00726.16
8.2.120.0040.00420.70
8.2.110.0060.00319.41
8.2.100.0040.00717.72
8.2.90.0040.00419.08
8.2.80.0040.00419.32
8.2.70.0000.00817.63
8.2.60.0030.00518.03
8.2.50.0040.00418.07
8.2.40.0050.00318.16
8.2.30.0080.00019.41
8.2.20.0040.00417.62
8.2.10.0000.00818.05
8.2.00.0050.00318.22
8.1.280.0070.00725.92
8.1.270.0000.00720.37
8.1.260.0030.00626.35
8.1.250.0040.00428.09
8.1.240.0060.00322.54
8.1.230.0120.00020.96
8.1.220.0000.00718.77
8.1.210.0040.00418.77
8.1.200.0060.00317.22
8.1.190.0000.00917.50
8.1.180.0090.00018.10
8.1.170.0000.00818.31
8.1.160.0000.00718.73
8.1.150.0070.00018.82
8.1.140.0040.00417.30
8.1.130.0030.00317.86
8.1.120.0050.00317.28
8.1.110.0050.00317.42
8.1.100.0040.00417.34
8.1.90.0040.00417.42
8.1.80.0070.00017.35
8.1.70.0070.00017.33
8.1.60.0000.00817.53
8.1.50.0000.00817.46
8.1.40.0080.00017.48
8.1.30.0050.00317.62
8.1.20.0040.00417.54
8.1.10.0000.00817.50
8.1.00.0050.00217.39
8.0.300.0040.00419.89
8.0.290.0040.00417.18
8.0.280.0030.00318.35
8.0.270.0040.00416.80
8.0.260.0070.00017.31
8.0.250.0040.00416.79
8.0.240.0000.00716.72
8.0.230.0000.00716.86
8.0.220.0000.00716.79
8.0.210.0000.00716.73
8.0.200.0030.00316.86
8.0.190.0000.00816.80
8.0.180.0080.00316.73
8.0.170.0000.00916.82
8.0.160.0040.00316.89
8.0.150.0050.00316.79
8.0.140.0060.00316.78
8.0.130.0000.00713.23
8.0.120.0040.00416.81
8.0.110.0040.00416.80
8.0.100.0030.00516.76
8.0.90.0000.00716.77
8.0.80.0060.01016.77
8.0.70.0000.00716.82
8.0.60.0000.00716.84
8.0.50.0030.00316.81
8.0.30.0090.01117.02
8.0.20.0060.01217.40
8.0.10.0000.00716.93
8.0.00.0140.00716.70
7.4.330.0000.00515.09
7.4.320.0000.00616.54
7.4.300.0060.00016.45
7.4.290.0020.00516.43
7.4.280.0040.00416.52
7.4.270.0070.00016.34
7.4.260.0040.00416.49
7.4.250.0040.00416.42
7.4.240.0060.00216.51
7.4.230.0000.00716.50
7.4.220.0070.01316.54
7.4.210.0060.00916.63
7.4.200.0070.00016.61
7.4.160.0120.00816.23
7.4.150.0000.01817.40
7.4.140.0130.00517.86
7.4.130.0150.00616.52
7.4.120.0090.00916.51
7.4.110.0100.01616.46
7.4.100.0100.00616.30
7.4.90.0110.00516.62
7.4.80.0130.01016.20
7.4.70.0060.01316.48
7.4.60.0080.00816.36
7.4.50.0030.00516.42
7.4.40.0130.00316.39
7.4.30.0100.00616.38
7.4.00.0080.00714.66
7.3.330.0000.00512.93
7.3.320.0060.00012.80
7.3.310.0000.00716.19
7.3.300.0030.00316.16
7.3.290.0040.01116.16
7.3.280.0090.00816.15
7.3.270.0180.00017.40
7.3.260.0070.01016.11
7.3.250.0090.00916.25
7.3.240.0110.01416.30
7.3.230.0120.01216.39
7.3.210.0110.00716.19
7.3.200.0040.01619.39
7.3.190.0210.00016.35
7.3.180.0120.00316.25
7.3.170.0070.01016.34
7.3.160.0080.00816.07
7.3.120.0100.00814.72
7.3.110.0090.00714.77
7.3.100.0050.01014.76
7.3.90.0020.01014.72
7.3.80.0020.00914.59
7.3.70.0060.00814.56
7.3.60.0050.00614.60
7.3.50.0080.00714.70
7.3.40.0090.00514.68
7.3.30.0090.00714.64
7.3.20.0100.00416.50
7.3.10.0070.00416.32
7.3.00.0080.00716.47
7.2.330.0120.00616.46
7.2.320.0130.00316.30
7.2.310.0090.00916.42
7.2.300.0090.00916.26
7.2.290.0120.00616.35
7.2.250.0100.00815.05
7.2.240.0070.01014.78
7.2.230.0030.00914.81
7.2.220.0110.00414.70
7.2.210.0050.00714.72
7.2.200.0070.00914.88
7.2.190.0080.00314.82
7.2.180.0010.01014.82
7.2.170.0050.00814.76
7.2.00.0080.00419.04
7.1.330.0060.00915.60
7.1.320.0050.00515.33
7.1.310.0090.00515.59
7.1.300.0060.00715.51
7.1.290.0020.01215.30
7.1.280.0050.00515.47
7.1.270.0050.00915.65
7.1.260.0120.00215.70
7.1.100.0030.01017.98
7.1.70.0040.00417.09
7.1.60.0060.00617.05
7.1.50.0130.01016.48
7.1.00.0030.07722.45
7.0.200.0070.01316.71
7.0.60.0300.06319.90
7.0.50.0030.04017.85
7.0.40.0100.07720.03
7.0.30.0570.06720.00
7.0.20.0230.07720.17
7.0.10.0030.04320.20
7.0.00.0100.04720.20
5.6.280.0000.07721.14
5.6.210.0200.04020.50
5.6.200.0100.06018.22
5.6.190.0100.07020.45
5.6.180.3870.03020.61
5.6.170.0370.06720.48
5.6.160.0170.06320.44
5.6.150.0100.04718.08
5.6.140.0100.03718.21
5.6.130.0070.08318.15
5.6.120.0100.08020.98
5.6.110.0070.03721.04
5.6.100.0200.05720.98
5.6.90.0030.09020.99
5.6.80.0070.04020.36
5.5.350.0230.07720.37
5.5.340.0070.05317.92
5.5.330.0000.06320.28
5.5.320.3970.04320.34
5.5.310.0130.05020.45
5.5.300.0030.04017.92
5.5.290.0130.03718.00
5.5.280.0100.07020.97
5.5.270.0100.07320.64
5.5.260.0100.07720.86
5.5.250.0070.08320.65
5.5.240.0130.07320.18
5.4.450.0230.04719.23
5.4.440.0470.03319.57
5.4.430.0870.04319.42
5.4.420.0330.03019.38
5.4.410.0130.05318.94
5.4.400.0230.03718.85
5.4.390.0030.06018.72
5.4.380.0130.05018.74
5.4.370.0170.04718.52
5.4.360.0200.05018.61
5.4.350.0070.06318.46
5.4.340.0130.05018.63
5.4.320.0170.05718.72
5.4.310.0100.06018.58
5.4.300.0230.04018.50
5.4.290.0070.06018.50
5.4.280.0200.06018.73
5.4.270.0070.07018.58
5.4.260.0200.04718.67
5.4.250.0170.07718.64
5.4.240.0170.05718.58
5.4.230.0170.05018.59
5.4.220.0170.04718.71
5.4.210.0070.05718.71
5.4.200.0100.05316.46
5.4.190.0170.04718.70
5.4.180.0070.05718.48
5.4.170.0200.04318.47
5.4.160.0270.03718.57
5.4.150.0130.05018.67
5.4.140.0170.04716.27
5.4.130.0170.04316.05
5.4.120.0130.05716.13
5.4.110.0200.05316.21
5.4.100.0200.06316.04
5.4.90.0130.07316.08
5.4.80.0130.07016.20
5.4.70.0230.06716.27
5.4.60.0200.06016.32
5.4.50.0130.06316.21
5.4.40.0100.05316.03
5.4.30.0170.05716.22
5.4.20.0030.07016.26
5.4.10.0070.07016.15
5.4.00.0130.05715.67
5.3.290.0170.06714.69
5.3.280.0130.06714.59
5.3.270.0200.07714.65
5.3.260.0070.07314.58
5.3.250.0200.05014.59
5.3.240.0130.07014.69
5.3.230.0170.06714.68
5.3.220.0130.06014.66
5.3.210.0170.07314.63
5.3.200.0170.06014.55
5.3.190.0070.06714.56
5.3.180.0170.04714.59
5.3.170.0130.04714.53
5.3.160.0000.06014.61
5.3.150.0070.06014.45
5.3.140.0030.06714.60
5.3.130.0030.06014.52
5.3.120.0030.08314.62
5.3.110.0030.06314.45
5.3.100.0200.05314.03
5.3.90.0070.05713.93
5.3.80.0100.05014.09
5.3.70.0200.04314.09
5.3.60.0130.05313.91
5.3.50.0130.05013.89
5.3.40.0070.06313.88
5.3.30.0100.05313.94
5.3.20.0130.05313.63
5.3.10.0070.05313.59
5.3.00.0170.04313.63
5.2.170.0100.04311.18
5.2.160.0100.04011.11
5.2.150.0100.04011.08
5.2.140.0100.04011.05
5.2.130.0170.03711.14
5.2.120.0070.04011.08
5.2.110.0130.03311.16
5.2.100.0130.03311.05
5.2.90.0030.04311.14
5.2.80.0000.05311.05
5.2.70.0070.04311.15
5.2.60.0130.04711.09
5.2.50.0070.05011.06
5.2.40.0000.05011.05
5.2.30.0200.03010.94
5.2.20.0170.03710.87
5.2.10.0100.03710.99
5.2.00.0070.05010.77
5.1.60.0000.0409.97
5.1.50.0070.0339.97
5.1.40.0130.03010.09
5.1.30.0100.03310.47
5.1.20.0100.04710.45
5.1.10.0030.04010.13
5.1.00.0100.03310.13
5.0.50.0100.0238.66
5.0.40.0030.0308.39
5.0.30.0030.0438.32
5.0.20.0070.0278.21
5.0.10.0000.0338.25
5.0.00.0100.0378.25
4.4.90.0070.0205.83
4.4.80.0000.0275.87
4.4.70.0000.0275.89
4.4.60.0030.0235.90
4.4.50.0030.0235.88
4.4.40.0100.0305.91
4.4.30.0030.0305.91
4.4.20.0030.0305.97
4.4.10.0130.0205.96
4.4.00.0030.0405.90
4.3.110.0030.0235.86
4.3.100.0070.0205.79
4.3.90.0070.0205.78
4.3.80.0100.0305.85
4.3.70.0000.0335.87
4.3.60.0000.0275.80
4.3.50.0070.0205.81
4.3.40.0030.0335.77
4.3.30.0000.0234.58
4.3.20.0030.0204.64
4.3.10.0000.0274.48
4.3.00.0030.01016.19

preferences:
67.57 ms | 401 KiB | 5 Q