3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mock = [ 'foo' => null ]; foreach ($mock as &$item) { $item = 'foo'; } unset($item); $mockCopy = $mock; var_dump("after assignment", $mock, $mockCopy); $mockCopy['foo_copy'] = $mock['foo']; var_dump("after foo_copy", $mock, $mockCopy); $mockCopy['foo'] = 'bar'; var_dump("after foo=bar", $mock, $mockCopy); var_dump($mock['foo']);

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)
8.3.60.0060.00916.73
8.3.50.0170.00422.92
8.3.40.0150.00018.79
8.3.30.0150.00018.67
8.3.20.0040.00421.49
8.3.10.0040.00423.52
8.3.00.0050.00321.89
8.2.180.0140.00718.29
8.2.170.0060.01222.96
8.2.160.0130.00022.26
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0000.00817.91
8.2.120.0050.00326.35
8.2.110.0090.00019.19
8.2.100.0060.00617.84
8.2.90.0000.00817.91
8.2.80.0040.00417.97
8.2.70.0090.00017.93
8.2.60.0000.00818.22
8.2.50.0030.00618.10
8.2.40.0040.00420.55
8.2.30.0000.00719.32
8.2.20.0030.00618.12
8.2.10.0030.00518.06
8.2.00.0070.00017.82
8.1.280.0150.00625.92
8.1.270.0040.00722.27
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00319.32
8.1.230.0080.00321.04
8.1.220.0050.00317.89
8.1.210.0040.00418.77
8.1.200.0080.00517.35
8.1.190.0000.00817.13
8.1.180.0000.00818.10
8.1.170.0110.00018.60
8.1.160.0030.00318.82
8.1.150.0000.00720.34
8.1.140.0040.00419.51
8.1.130.0000.00720.29
8.1.120.0030.00317.49
8.1.110.0080.00017.36
8.1.100.0000.00717.44
8.1.90.0000.00717.31
8.1.80.0040.00417.47
8.1.70.0000.00717.45
8.1.60.0080.00017.62
8.1.50.0030.00617.46
8.1.40.0070.00417.54
8.1.30.0000.00817.54
8.1.20.0000.00917.64
8.1.10.0020.00517.57
8.1.00.0000.00717.45
8.0.300.0050.00220.06
8.0.290.0000.00816.63
8.0.280.0000.00718.33
8.0.270.0080.00016.90
8.0.260.0030.00318.59
8.0.250.0000.00716.93
8.0.240.0040.00416.98
8.0.230.0030.00516.86
8.0.220.0000.00716.90
8.0.210.0030.00316.81
8.0.200.0030.00616.95
8.0.190.0040.00416.85
8.0.180.0040.00416.90
8.0.170.0040.00416.84
8.0.160.0070.00016.95
8.0.150.0070.00016.82
8.0.140.0040.00416.80
8.0.130.0000.00613.39
8.0.120.0040.00416.87
8.0.110.0040.00416.91
8.0.100.0050.00316.72
8.0.90.0000.00716.78
8.0.80.0090.00916.88
8.0.70.0000.00716.89
8.0.60.0040.00416.95
8.0.50.0000.00816.73
8.0.30.0070.01817.26
8.0.20.0140.00617.40
8.0.10.0000.00817.04
8.0.00.0060.01216.64
7.4.330.0000.00515.55
7.4.320.0070.00016.44
7.4.300.0030.00316.53
7.4.290.0000.00716.43
7.4.280.0060.00316.62
7.4.270.0030.00316.59
7.4.260.0100.00016.55
7.4.250.0050.00316.47
7.4.240.0070.00016.61
7.4.230.0000.00716.54
7.4.220.0090.00916.38
7.4.210.0030.01316.54
7.4.200.0070.00016.73
7.4.160.0090.01016.52
7.4.150.0120.00617.40
7.4.140.0080.01317.86
7.4.130.0110.00516.50
7.4.120.0100.01216.45
7.4.110.0090.00916.56
7.4.100.0110.00716.58
7.4.90.0090.00916.56
7.4.80.0070.01319.39
7.4.70.0080.00816.71
7.4.60.0080.00816.60
7.4.50.0100.00616.59
7.4.40.0060.01116.42
7.4.30.0030.01316.35
7.4.00.0050.01114.86
7.3.330.0030.00313.18
7.3.320.0000.00513.24
7.3.310.0050.00216.36
7.3.300.0000.00616.35
7.3.290.0050.00816.35
7.3.280.0060.01216.30
7.3.270.0030.01317.40
7.3.260.0150.00516.26
7.3.250.0070.01316.47
7.3.240.0110.01116.54
7.3.230.0120.00616.50
7.3.210.0110.00816.44
7.3.200.0090.00916.33
7.3.190.0130.00316.52
7.3.180.0040.01716.43
7.3.170.0130.00616.51
7.3.160.0070.01116.44
7.3.120.0040.01515.13
7.3.110.0040.01414.79
7.3.100.0030.00614.70
7.3.90.0120.00314.84
7.3.80.0030.00714.66
7.3.70.0080.00314.84
7.3.60.0070.00714.96
7.3.50.0040.00414.68
7.3.40.0070.00314.85
7.3.30.0040.00714.71
7.3.20.0000.01016.68
7.3.10.0070.00716.89
7.3.00.0000.00916.57
7.2.330.0100.00716.40
7.2.320.0180.00016.46
7.2.310.0130.00316.61
7.2.300.0070.01716.71
7.2.290.0140.00316.64
7.2.250.0060.01115.21
7.2.240.0070.01315.07
7.2.230.0110.00414.86
7.2.220.0090.00614.91
7.2.210.0060.00615.02
7.2.200.0040.00714.79
7.2.190.0070.01014.85
7.2.180.0080.00315.14
7.2.170.0030.00914.93
7.2.60.0070.01016.85
7.2.00.0090.00319.45
7.1.330.0070.00715.95
7.1.320.0030.00915.78
7.1.310.0040.01115.88
7.1.300.0000.01415.71
7.1.290.0030.00615.77
7.1.280.0000.00815.86
7.1.270.0080.00415.85
7.1.260.0110.00416.04
7.1.200.0090.00315.88
7.1.100.0000.01118.12
7.1.70.0040.01117.17
7.1.60.0060.00617.36
7.1.50.0120.00916.96
7.1.10.0100.06022.24
7.1.00.0230.06722.47
7.0.200.0080.00816.86
7.0.150.0130.05321.95
7.0.140.0100.06021.90
7.0.130.0200.04721.90
7.0.120.0070.06321.80
7.0.110.0030.09021.86
7.0.100.0200.07021.79
7.0.90.0100.08321.84
7.0.80.0070.06321.82
7.0.70.0270.07720.06
7.0.60.0300.05320.25
7.0.50.0070.08321.83
7.0.40.0030.07721.86
7.0.30.0100.07721.72
7.0.20.0130.05321.85
7.0.10.0000.08321.88
7.0.00.0030.08021.93

preferences:
35.95 ms | 401 KiB | 5 Q