3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_SESSION['fr_nick'] = null; var_dump( [ isset( $_SESSION['fr_nick'] ), array_key_exists('fr_nick', $_SESSION), empty( $_SESSION['fr_nick'] ) ] );

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)
8.3.70.0130.00718.56
8.3.60.0170.00316.63
8.3.50.0110.00821.21
8.3.40.0090.00618.76
8.3.30.0070.01018.46
8.3.20.0040.00420.16
8.3.10.0000.00923.66
8.3.00.0080.00023.42
8.2.190.0090.00616.63
8.2.180.0110.00418.29
8.2.170.0130.00622.96
8.2.160.0000.01419.43
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0000.00726.16
8.2.120.0080.00019.66
8.2.110.0080.00021.18
8.2.100.0110.00017.91
8.2.90.0000.00818.16
8.2.80.0040.00420.59
8.2.70.0070.00417.91
8.2.60.0040.00418.22
8.2.50.0060.00318.10
8.2.40.0080.00021.04
8.2.30.0050.00219.22
8.2.20.0040.00417.80
8.2.10.0000.00818.03
8.2.00.0030.00518.00
8.1.280.0170.00325.92
8.1.270.0040.00423.95
8.1.260.0050.00326.35
8.1.250.0080.00028.09
8.1.240.0030.00622.00
8.1.230.0060.00620.97
8.1.220.0000.00817.79
8.1.210.0030.00618.85
8.1.200.0040.00817.35
8.1.190.0090.00017.35
8.1.180.0000.00818.10
8.1.170.0030.00618.50
8.1.160.0030.00620.58
8.1.150.0040.00418.56
8.1.140.0050.00319.56
8.1.130.0000.00717.83
8.1.120.0000.00717.48
8.1.110.0000.00717.37
8.1.100.0040.00417.41
8.1.90.0040.00417.49
8.1.80.0000.00717.31
8.1.70.0030.00517.45
8.1.60.0040.00417.46
8.1.50.0040.00417.43
8.1.40.0040.00417.51
8.1.30.0030.00617.55
8.1.20.0040.00417.50
8.1.10.0040.00417.64
8.1.00.0040.00417.52
8.0.300.0080.00020.05
8.0.290.0020.00516.63
8.0.280.0040.00418.34
8.0.270.0000.00717.95
8.0.260.0030.00317.24
8.0.250.0000.00716.90
8.0.240.0030.00616.78
8.0.230.0070.00016.88
8.0.220.0050.00316.87
8.0.210.0030.00616.85
8.0.200.0000.00916.91
8.0.190.0030.00616.90
8.0.180.0040.00416.86
8.0.170.0080.00016.71
8.0.160.0000.00716.74
8.0.150.0040.00416.73
8.0.140.0000.00716.72
8.0.130.0030.00313.26
8.0.120.0000.00816.82
8.0.110.0070.00016.71
8.0.100.0040.00416.71
8.0.90.0000.00716.61
8.0.80.0110.00416.78
8.0.70.0000.00716.83
8.0.60.0070.00016.83
8.0.50.0000.00716.71
8.0.30.0130.00516.90
8.0.20.0110.00917.40
8.0.10.0090.00016.86
8.0.00.0080.01016.76
7.4.330.0030.00316.89
7.4.320.0000.00616.62
7.4.300.0000.00716.57
7.4.290.0030.00616.49
7.4.280.0050.00516.48
7.4.270.0030.00316.45
7.4.260.0070.00016.56
7.4.250.0030.00516.46
7.4.240.0020.00616.56
7.4.230.0070.00016.53
7.4.220.0130.01016.49
7.4.210.0100.00616.53
7.4.200.0030.00316.45
7.4.160.0110.01116.26
7.4.150.0070.01717.40
7.4.140.0070.01117.86
7.4.130.0090.01416.45
7.4.120.0100.01016.57
7.4.110.0030.01616.36
7.4.100.0100.00716.46
7.4.90.0060.01116.37
7.4.80.0130.00319.39
7.4.70.0070.01016.38
7.4.60.0110.00416.45
7.4.50.0130.00316.37
7.4.40.0060.01116.47
7.4.30.0100.01016.58
7.4.10.0070.00814.85
7.4.00.0070.00914.96
7.3.330.0000.00613.23
7.3.320.0050.00013.16
7.3.310.0030.00316.38
7.3.300.0000.00716.26
7.3.290.0040.00416.23
7.3.280.0080.01016.31
7.3.270.0140.00317.40
7.3.260.0160.00616.31
7.3.250.0090.01016.39
7.3.240.0040.01416.46
7.3.230.0130.00316.39
7.3.210.0130.00316.43
7.3.200.0140.00419.39
7.3.190.0090.00916.18
7.3.180.0070.01416.16
7.3.170.0000.01716.31
7.3.160.0070.01116.42
7.3.130.0070.01114.74
7.3.120.0100.00714.81
7.3.110.0030.01414.83
7.3.100.0080.00614.90
7.3.90.0050.00614.71
7.3.80.0060.00914.84
7.3.70.0040.00914.71
7.3.60.0030.01014.72
7.3.50.0070.00714.66
7.3.40.0050.00614.68
7.3.30.0070.00614.83
7.3.20.0050.01116.59
7.3.10.0110.00516.59
7.3.00.0070.00716.63
7.2.330.0030.01316.66
7.2.320.0110.00616.71
7.2.310.0100.00716.27
7.2.300.0080.01116.62
7.2.290.0130.00316.44
7.2.260.0110.00414.64
7.2.250.0070.01015.07
7.2.240.0040.01214.96
7.2.230.0110.00615.17
7.2.220.0090.00514.89
7.2.210.0110.00415.11
7.2.200.0020.01414.97
7.2.190.0070.01014.99
7.2.180.0090.00614.74
7.2.170.0070.00814.87
7.2.160.0050.00515.14
7.2.150.0070.00716.77
7.2.140.0100.00417.03
7.2.130.0080.00916.72
7.2.120.0080.00816.71
7.2.110.0040.00616.77
7.2.100.0050.00516.62
7.2.90.0020.00816.80
7.2.80.0080.00816.72
7.2.70.0050.01116.92
7.2.60.0050.00716.95
7.2.50.0040.00916.89
7.2.40.0020.01116.94
7.2.30.0060.00316.92
7.2.20.0100.00517.03
7.2.10.0070.00717.04
7.2.00.0040.01117.76
7.1.330.0030.01015.75
7.1.320.0040.01115.75
7.1.310.0100.00215.87
7.1.300.0050.00615.70
7.1.290.0070.00815.66
7.1.280.0080.00815.69
7.1.270.0070.00615.55
7.1.260.0020.01015.80
7.1.250.0050.00915.87
7.1.240.0010.01215.77
7.1.230.0070.00515.73
7.1.220.0070.00715.80
7.1.210.0030.00815.61
7.1.200.0040.00615.76
7.1.190.0080.00615.83
7.1.180.0070.00515.71
7.1.170.0040.00715.76
7.1.160.0060.00815.59
7.1.150.0050.00515.78
7.1.140.0050.01015.89
7.1.130.0050.00915.78
7.1.120.0080.00315.57
7.1.110.0060.00315.85
7.1.100.0030.01116.51
7.1.90.0060.00315.85
7.1.80.0020.00815.94
7.1.70.0050.00616.27
7.1.60.0110.00816.74
7.1.50.0080.01216.09
7.1.40.0060.00615.82
7.1.30.0060.00715.62
7.1.20.0060.00815.54
7.1.10.0020.01215.76
7.1.00.0030.03017.95
7.0.330.0060.00815.37
7.0.320.0050.00715.06
7.0.310.0060.00815.37
7.0.300.0060.00815.31
7.0.290.0050.00915.30
7.0.280.0040.00915.34
7.0.270.0090.00515.29
7.0.260.0090.00115.24
7.0.250.0050.00715.24
7.0.240.0050.00915.50
7.0.230.0020.01015.33
7.0.220.0030.01015.40
7.0.210.0050.01215.43
7.0.200.0090.00615.67
7.0.190.0080.00715.44
7.0.180.0080.00315.32
7.0.170.0050.00915.15
7.0.160.0030.00815.23
7.0.150.0080.00615.29
7.0.140.0060.00615.27
7.0.130.0020.01015.08
7.0.120.0010.00815.47
7.0.110.0040.00615.38
7.0.100.0020.00815.11
7.0.90.0080.02316.84
7.0.80.0070.02116.93
7.0.70.0210.02416.90
7.0.60.0230.03116.88
7.0.50.0170.03016.86
7.0.40.0090.01915.59
7.0.30.0080.03315.57
7.0.20.0060.03315.61
7.0.10.0110.02715.67
7.0.00.0050.02915.60
5.6.400.0060.00614.29
5.6.390.0030.01014.56
5.6.380.0070.00714.19
5.6.370.0060.00714.44
5.6.360.0060.00614.41
5.6.350.0040.01114.15
5.6.340.0050.00814.60
5.6.330.0090.00514.20
5.6.320.0090.00514.37
5.6.310.0020.01114.28
5.6.300.0040.01014.58
5.6.290.0060.00714.54
5.6.280.0060.01516.43
5.6.270.0110.00314.21
5.6.260.0040.00814.38
5.6.250.0070.00514.28
5.6.240.0060.00614.16
5.6.230.0030.02616.50
5.6.220.0060.03016.58
5.6.210.0050.03216.29
5.6.200.0040.02216.47
5.6.190.0050.01916.48
5.6.180.0110.02416.50
5.6.170.0100.02816.51
5.6.160.0040.02516.65
5.6.150.0060.02016.65
5.6.140.0100.02916.58
5.6.130.0050.03316.48
5.6.120.0110.01616.55
5.6.110.0080.01816.54
5.6.100.0080.03216.60
5.6.90.0100.02816.60
5.6.80.0070.02116.17
5.6.70.0050.02216.31
5.6.60.0060.03016.26
5.6.50.0070.02716.14
5.6.40.0080.02416.42
5.6.30.0090.02316.37
5.6.20.0070.02916.35
5.6.10.0060.02416.27
5.6.00.0060.03416.17
5.5.380.0080.00114.32
5.5.370.0060.02716.43
5.5.360.0090.03016.28
5.5.350.0040.03116.33
5.5.340.0070.03116.44
5.5.330.0070.03216.24
5.5.320.0090.02316.57
5.5.310.0080.03016.38
5.5.300.0060.02016.59
5.5.290.0070.01816.40
5.5.280.0070.01616.51
5.5.270.0090.03016.52
5.5.260.0040.03016.41
5.5.250.0050.03516.32
5.5.240.0080.03016.25
5.5.230.0040.03316.15
5.5.220.0060.02116.12
5.5.210.0090.02416.18
5.5.200.0060.03016.17
5.5.190.0040.02316.25
5.5.180.0090.02916.18
5.5.170.0070.00714.14
5.5.160.0050.02116.22
5.5.150.0110.02416.16
5.5.140.0070.03016.03
5.5.130.0080.02716.06
5.5.120.0060.02216.06
5.5.110.0080.03216.27
5.5.100.0060.02916.15
5.5.90.0060.03516.27
5.5.80.0050.02416.05
5.5.70.0070.02916.19
5.5.60.0080.02716.11
5.5.50.0070.01815.94
5.5.40.0030.03116.17
5.5.30.0060.01816.06
5.5.20.0030.02516.22
5.5.10.0080.02916.16
5.5.00.0080.02716.18

preferences:
33.64 ms | 401 KiB | 5 Q