3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set("session.use_cookies", false); class A { public $b; public function __construct() { $this->b = new B(); } } class B { public $a; public function __construct() { $this->A = new A(); } } $a = new A(); session_start(); $id = session_id(); $_SESSION['test'] = $a; session_write_close(); session_id('boo'); session_start(); session_write_close(); session_id($id); session_start(); echo serialize($_SESSION['test']);

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)
8.3.60.0500.02079.15
8.3.50.0470.02579.41
8.3.40.0280.02147.54
8.3.30.0530.01347.61
8.3.20.0190.00649.04
8.3.10.0140.01447.54
8.3.00.0190.00047.87
8.2.180.0810.01078.68
8.2.170.0350.02847.72
8.2.160.0190.01649.37
8.2.150.0140.01447.60
8.2.140.0090.00947.60
8.2.130.0190.00348.26
8.2.120.0030.01050.36
8.2.110.0030.01550.30
8.2.100.0360.01046.59
8.2.90.0240.00946.91
8.2.80.0170.01046.97
8.2.70.0110.01446.55
8.2.60.0240.00346.78
8.2.50.0200.00746.38
8.2.40.0190.00649.48
8.2.30.0100.01348.09
8.2.20.0140.01146.36
8.2.10.0130.01046.75
8.2.00.0120.00946.74
8.1.280.0460.03077.96
8.1.270.0060.01051.91
8.1.260.0300.00750.96
8.1.250.0200.00349.26
8.1.240.0160.00350.34
8.1.230.0310.01049.82
8.1.220.0150.01146.54
8.1.210.0200.00747.38
8.1.200.0210.01746.10
8.1.190.0280.00045.88
8.1.180.0130.01345.98
8.1.170.0170.00747.48
8.1.160.0100.01650.89
8.1.150.0110.01447.56
8.1.140.0100.01348.21
8.1.130.0170.00746.48
8.1.120.0070.01646.20
8.1.110.0150.00746.23
8.1.100.0200.00346.23
8.1.90.0160.00646.23
8.1.80.0100.01346.14
8.1.70.0190.01346.12
8.1.60.0130.01346.37
8.1.50.0240.01446.33
8.1.40.0180.01146.33
8.1.30.0100.01646.30
8.1.20.0130.01346.29
8.1.10.0250.02179.52
8.1.00.0200.02779.38
8.0.300.0260.01381.93
8.0.290.0340.01478.84
8.0.280.0320.01880.29
8.0.270.0220.02279.14
8.0.260.0300.01379.16
8.0.250.0250.01878.81
8.0.240.0360.02378.91
8.0.230.0100.03078.64
8.0.220.0170.02478.77
8.0.210.0270.01378.66
8.0.200.0350.00678.75
8.0.190.0360.01678.84
8.0.180.0200.02778.67
8.0.170.0200.02778.77
8.0.160.0200.02678.72
8.0.150.0270.02078.69
8.0.140.0230.02378.66
8.0.130.0520.035133.68
8.0.120.0350.01678.72
8.0.110.0250.01978.72
8.0.100.0250.01878.55
8.0.90.0300.01778.75
8.0.80.0530.03978.73
8.0.70.0130.03378.56
8.0.60.0340.01378.52
8.0.50.0280.02178.77
8.0.30.0670.03578.98
8.0.20.0630.05378.97
8.0.10.0310.01778.79
8.0.00.0710.05278.61
7.4.330.0070.02377.12
7.4.320.0270.01478.30
7.4.300.0360.01378.48
7.4.290.0330.02078.45
7.4.280.0320.01478.43
7.4.270.0290.01678.45
7.4.260.0230.03378.25
7.4.250.0190.03278.44
7.4.240.0270.02078.38
7.4.230.0270.02078.28
7.4.220.1040.07878.27
7.4.210.0560.05578.43
7.4.200.0260.02078.58
7.4.160.0520.04978.46
7.4.150.0710.05178.48
7.4.140.0770.04278.36
7.4.130.0840.05378.42
7.4.120.0810.04678.43
7.4.110.0820.03678.61
7.4.100.0650.06878.33
7.4.90.0510.06178.29
7.4.80.0830.05478.31
7.4.70.0670.05278.50
7.4.60.0710.04578.39
7.4.50.0300.03778.39
7.4.40.0590.05278.25
7.4.30.0780.03278.51
7.4.00.0440.02376.93
7.3.330.0460.043133.81
7.3.320.0820.029133.60
7.3.310.0230.02678.13
7.3.300.0270.01778.14
7.3.290.0270.02078.04
7.3.280.0620.04978.17
7.3.270.0700.05478.39
7.3.260.0810.03778.17
7.3.240.0650.04478.14
7.3.230.0750.04178.47
7.3.210.0790.04278.45
7.3.200.0570.05078.39
7.3.190.0470.06478.47
7.3.180.0710.04978.11
7.3.170.0790.03478.32
7.3.160.0680.04078.37
7.2.330.0760.04078.31
7.2.320.0540.09478.54
7.2.310.0650.04878.59
7.2.300.0670.05478.57
7.2.290.0680.04478.48
7.2.60.2080.02778.51
7.2.00.0070.03181.27
7.1.200.1100.04077.43
7.1.100.0380.00937.89
7.1.70.1010.02078.99
7.1.60.0130.04479.15
7.1.50.0440.04478.93
7.1.00.0170.09784.42
7.0.200.7160.03076.39
7.0.60.1070.09381.87
7.0.50.0130.08379.71
7.0.40.0300.09721.89
7.0.30.0430.08021.91
7.0.20.0530.09022.09
7.0.10.0100.08021.92
7.0.00.0130.06022.14
5.6.280.0230.07383.93
5.6.210.0330.09083.61
5.6.200.0230.11081.05
5.6.190.0230.12083.13
5.6.180.0570.06383.27
5.6.170.0500.09783.25
5.6.160.0170.06783.08
5.6.150.0300.07781.05
5.6.140.0200.05781.10
5.6.130.0270.09081.07
5.6.120.0270.11383.91
5.6.110.0300.11784.05
5.6.100.0370.11783.95
5.6.90.0400.10783.91
5.6.80.0400.10083.30
5.5.350.0600.10782.30
5.5.340.0200.05779.80
5.5.330.0100.11382.16
5.5.320.0900.08782.10
5.5.310.0530.10082.03
5.5.300.0400.11079.84
5.5.290.0300.08779.86
5.5.280.0370.09382.64
5.5.270.0430.08082.84
5.5.260.0270.11382.85
5.5.250.0400.09082.45
5.5.240.0130.07082.09

preferences:
82.94 ms | 401 KiB | 5 Q