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run code in 300+ PHP versions simultaneously
<?php class Authenticator { protected $isloggedin; protected $session; public function __construct(Session $session) { $this->session = $session; // if ( ! empty($session->get('isloggedin')) && $session->get('isloggedin') == true) { $isl = $session->get('isloggedin'); if ( ! empty($isl) && $isl == true) { $this->isloggedin = true; } $uid = $session->get('userid'); if ( ! empty($uid) && (int) $uid == $uid ) { $this->userid = (int) $uid; } } public function authenticate($username, $password) { if ($this->isloggedin) return true; if ( empty($username)) return false; if ( empty($password)) return false; // ... return false; } public function logout() { $this->isloggedin = false; $this->userid = 0; $this->session->del('isloggedin'); $this->session->del('userid'); } public function isloggedin() { return $this->isloggedin; } } interface Session { public function set($key, $val=true); public function del($key, $val=false); public function get($key); } class BasicSession implements Session { protected $session = array(); private function _construct(array $s) { if ( ! session_start() ) { throw new Exception('Could not initiate web session'); } $this->session = $_SESSION; } public function set($key, $val=true) { $this->session[$key] = $val; } public function del($key, $val=false) { if (isset($this->session[$key])) { $this->session[$key] = $val; unset($this->session[$key]); } } public function get($key) { if (isset($this->session[$key])) { return $this->session[$key]; } return false; } } try { $sess = new BasicSession(); $auth = new Authenticator($sess); } catch (Exception $e) { die('System go KA-BOOM! ' . $e->getMessage()); }

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)
8.3.60.0070.01018.56
8.3.50.0090.00921.27
8.3.40.0110.00418.80
8.3.30.0030.01019.17
8.3.20.0040.00420.31
8.3.10.0040.00422.09
8.3.00.0050.00322.51
8.2.180.0070.00716.75
8.2.170.0040.01122.96
8.2.160.0110.00419.04
8.2.150.0000.00824.18
8.2.140.0000.00824.66
8.2.130.0110.00426.16
8.2.120.0050.00319.89
8.2.110.0060.00322.00
8.2.100.0100.00319.63
8.2.90.0000.00819.20
8.2.80.0050.00317.97
8.2.70.0040.00417.50
8.2.60.0090.00018.03
8.2.50.0030.00518.07
8.2.40.0020.00718.17
8.2.30.0070.00418.08
8.2.20.0040.00417.63
8.2.10.0040.00417.82
8.2.00.0040.00417.66
8.1.280.0030.01525.92
8.1.270.0030.00622.14
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.91
8.1.230.0110.00019.16
8.1.220.0080.00017.74
8.1.210.0040.00418.77
8.1.200.0090.00017.34
8.1.190.0040.00417.52
8.1.180.0040.00418.77
8.1.170.0000.00918.38
8.1.160.0000.00722.22
8.1.150.0070.00018.68
8.1.140.0050.00217.45
8.1.130.0000.00717.84
8.1.120.0000.00717.52
8.1.110.0050.00317.36
8.1.100.0030.00417.49
8.1.90.0040.00417.46
8.1.80.0050.00217.42
8.1.70.0000.00717.45
8.1.60.0090.00017.62
8.1.50.0080.00017.46
8.1.40.0000.00817.39
8.1.30.0000.00717.57
8.1.20.0040.00417.66
8.1.10.0030.00617.55
8.1.00.0030.00517.42
8.0.300.0000.00718.77
8.0.290.0040.00417.18
8.0.280.0030.00318.48
8.0.270.0000.00717.21
8.0.260.0000.00716.99
8.0.250.0030.00317.09
8.0.240.0060.00316.97
8.0.230.0030.00317.06
8.0.220.0030.00316.91
8.0.210.0000.00616.95
8.0.200.0030.00316.93
8.0.190.0000.00916.93
8.0.180.0080.00016.98
8.0.170.0040.00416.97
8.0.160.0080.00016.93
8.0.150.0040.00416.81
8.0.140.0000.00716.98
8.0.130.0030.00313.45
8.0.120.0040.00416.97
8.0.110.0050.00216.99
8.0.100.0070.00016.87
8.0.90.0000.00717.02
8.0.80.0030.01217.04
8.0.70.0000.00816.78
8.0.60.0040.00416.86
8.0.50.0040.00416.80
8.0.30.0080.01117.22
8.0.20.0090.00917.40
8.0.10.0040.00416.96
8.0.00.0100.00816.71
7.4.330.0050.00015.03
7.4.320.0000.00716.47
7.4.300.0030.00316.61
7.4.290.0030.00316.50
7.4.280.0030.00316.50
7.4.270.0030.00316.55
7.4.260.0000.00816.45
7.4.250.0070.00016.51
7.4.240.0030.00416.54
7.4.230.0030.00316.33
7.4.220.0120.00616.59
7.4.210.0070.00816.62
7.4.200.0050.00216.61
7.4.190.0040.00416.50
7.4.160.0140.00716.60
7.4.150.0040.01217.40
7.4.140.0090.00817.86
7.4.130.0120.00516.60
7.4.120.0060.01116.53
7.4.110.0140.00316.42
7.4.100.0030.01416.51
7.4.90.0130.01016.62
7.4.80.0060.01619.39
7.4.70.0100.00716.48
7.4.60.0080.00916.55
7.4.50.0030.00616.42
7.4.40.0050.01022.77
7.4.30.0100.00616.63
7.4.00.0030.01314.91
7.3.330.0000.00513.26
7.3.320.0060.00013.27
7.3.310.0000.00716.12
7.3.300.0000.00716.26
7.3.290.0030.01016.25
7.3.280.0110.00416.27
7.3.270.0090.01317.40
7.3.260.0100.00716.41
7.3.250.0110.00616.47
7.3.240.0110.00616.46
7.3.230.0160.00916.39
7.3.210.0130.00316.46
7.3.200.0100.01019.39
7.3.190.0140.00316.28
7.3.180.0150.00016.27
7.3.170.0140.00316.36
7.3.160.0060.00916.39
7.3.120.0100.00814.87
7.3.110.0130.00314.87
7.3.100.0000.01414.77
7.3.90.0030.00714.52
7.3.80.0000.01514.79
7.3.70.0040.00714.63
7.3.60.0110.00414.97
7.3.50.0040.01114.79
7.3.40.0000.01414.74
7.3.30.0100.00314.75
7.3.20.0040.01216.79
7.3.10.0080.00416.52
7.3.00.0070.00716.37
7.2.330.0150.00916.44
7.2.320.0100.00716.62
7.2.310.0100.00716.72
7.2.300.0070.01016.72
7.2.290.0120.00616.85
7.2.250.0070.01314.98
7.2.240.0110.00814.87
7.2.230.0000.01514.89
7.2.220.0030.01014.82
7.2.210.0100.00614.88
7.2.200.0030.01015.00
7.2.190.0060.01014.82
7.2.180.0030.00715.12
7.2.170.0040.00715.11
7.2.00.0130.00319.45
7.1.330.0070.00715.46
7.1.320.0060.00615.79
7.1.310.0090.00615.68
7.1.300.0030.01015.68
7.1.290.0000.01515.68
7.1.280.0030.00915.92
7.1.270.0040.00715.38
7.1.260.0030.01015.61
7.1.100.0060.00618.16
7.1.70.0050.00516.98
7.1.60.0120.00917.24
7.1.50.0030.00717.02
7.1.00.0000.07322.42
7.0.200.0070.01116.72
7.0.140.0100.06722.01
7.0.60.0070.08019.86
7.0.50.0100.03317.88
7.0.40.0200.07020.23
7.0.30.0270.08720.08
7.0.20.0200.04720.03
7.0.10.0070.05320.17
7.0.00.0030.04320.25
5.6.280.0100.06721.12
5.6.210.0130.05720.75
5.6.200.0100.08318.14
5.6.190.0000.09020.48
5.6.180.0500.05020.47
5.6.170.0200.06020.47
5.6.160.0100.07720.44
5.6.150.0070.04018.15
5.6.140.0030.08318.14
5.6.130.0070.08318.12
5.6.120.0100.05721.16
5.6.110.0130.04321.13
5.6.100.0070.04020.91
5.6.90.0000.04720.86
5.6.80.0030.04320.54
5.5.350.0270.07720.51
5.5.340.0100.07717.98
5.5.330.0070.07320.35
5.5.320.2830.04020.42
5.5.310.0200.04320.34
5.5.300.0070.08018.08
5.5.290.0130.08017.98
5.5.280.0100.08320.79
5.5.270.0070.08320.90
5.5.260.0070.04020.87
5.5.250.0030.04020.71
5.5.240.0000.08020.03
5.4.450.0630.06019.38
5.4.440.0130.06019.34
5.4.430.0230.06719.58
5.4.420.0200.05019.47
5.4.410.0170.04719.05
5.4.400.0630.05718.76
5.4.390.1070.05018.76
5.4.380.0300.05718.61
5.4.370.0130.05718.84
5.4.360.0100.05318.63
5.4.350.0170.05018.59
5.4.340.0130.05018.74
5.4.320.0050.03812.52
5.4.310.0110.04312.52
5.4.300.0110.04212.52
5.4.290.0050.04812.52
5.4.280.0100.03412.41
5.4.270.0050.03712.41
5.4.260.0080.04612.41
5.4.250.0100.05018.86
5.4.240.0000.06018.75
5.4.230.0070.07318.86
5.4.220.0270.06018.95
5.4.210.0100.04718.61
5.4.200.0100.05018.76
5.4.190.0200.03719.04
5.4.180.0100.05318.98
5.4.170.0030.07318.90
5.4.160.0000.06718.84
5.4.150.0000.08018.59
5.4.140.0100.07016.55
5.4.130.0100.06716.44
5.4.120.0070.06716.61
5.4.110.0070.05316.42
5.4.100.0130.06316.43
5.4.90.0100.06016.50
5.4.80.0070.05016.38
5.4.70.0030.07316.52
5.4.60.0130.06016.50
5.4.50.0030.05016.34
5.4.40.0100.05016.49
5.4.30.0070.06716.41
5.4.20.0170.06316.34
5.4.10.0070.05716.48
5.4.00.0130.04315.83
5.3.290.0060.04512.80
5.3.280.0070.05314.80
5.3.270.0100.06314.54
5.3.260.0170.04714.65
5.3.250.0030.05014.72
5.3.240.0100.06714.71
5.3.230.0100.06714.80
5.3.220.0130.07314.59
5.3.210.0000.06314.66
5.3.200.0030.05314.50
5.3.190.0030.05714.56
5.3.180.0030.05714.56
5.3.170.0130.04714.81
5.3.160.0270.05314.61
5.3.150.0130.06714.56
5.3.140.0170.05714.76
5.3.130.0230.04714.73
5.3.120.0070.05014.59
5.3.110.0200.07014.56
5.3.100.0130.04314.21
5.3.90.0200.06014.03
5.3.80.0000.05313.88
5.3.70.0130.04314.05
5.3.60.0000.05714.20
5.3.50.0070.05014.04
5.3.40.0130.04314.19
5.3.30.0070.07013.92
5.3.20.0000.05313.80
5.3.10.0000.07313.80
5.3.00.0030.05313.68
5.2.170.0130.03311.16
5.2.160.0000.05311.24
5.2.150.0030.04311.14
5.2.140.0030.06311.00
5.2.130.0070.04011.21
5.2.120.0100.04711.21
5.2.110.0000.04311.08
5.2.100.0100.03311.08
5.2.90.0030.04011.11
5.2.80.0100.05711.27
5.2.70.0000.04311.02
5.2.60.0070.04311.15
5.2.50.0070.04711.12
5.2.40.0070.04011.02
5.2.30.0100.05311.06
5.2.20.0070.04711.07
5.2.10.0130.04010.88
5.2.00.0100.03710.93
5.1.60.0070.03010.02
5.1.50.0030.0439.98
5.1.40.0130.02310.05
5.1.30.0030.04710.33
5.1.20.0070.03310.39
5.1.10.0030.03310.11
5.1.00.0070.05010.05
5.0.50.0070.0338.62
5.0.40.0030.0408.50
5.0.30.0000.0608.20
5.0.20.0000.0308.45
5.0.10.0100.0308.44
5.0.00.0030.0608.14
4.4.90.0000.0237.43
4.4.80.0000.0237.43
4.4.70.0000.0337.43
4.4.60.0030.0307.43
4.4.50.0100.0277.43
4.4.40.0030.0407.43
4.4.30.0000.0237.43
4.4.20.0030.0207.43
4.4.10.0030.0237.43
4.4.00.0000.0377.43
4.3.110.0000.0277.43
4.3.100.0000.0307.43
4.3.90.0000.0237.43
4.3.80.0030.0337.43
4.3.70.0000.0277.43
4.3.60.0000.0237.43
4.3.50.0030.0307.43
4.3.40.0030.0337.43
4.3.30.0000.0237.43
4.3.20.0070.0177.43
4.3.10.0000.0307.43
4.3.00.0170.0176.69

preferences:
40.56 ms | 401 KiB | 5 Q