3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo (int) isset( $a ); // false and w/o error msg echo (int) empty( $a ); // true (false and 0 empty, too echo (int) is_null( $a ); // true and error msg echo (int) null === $a; // true and error msg

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)
8.3.60.0070.00716.62
8.3.50.0110.00522.00
8.3.40.0000.01518.67
8.3.30.0170.00018.82
8.3.20.0000.00820.19
8.3.10.0040.00423.52
8.3.00.0090.00020.96
8.2.180.0040.01116.63
8.2.170.0070.00722.96
8.2.160.0070.01020.35
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0080.00020.79
8.2.110.0070.00322.30
8.2.100.0070.00717.66
8.2.90.0040.00419.09
8.2.80.0030.00617.97
8.2.70.0030.00717.50
8.2.60.0000.00817.91
8.2.50.0090.00018.07
8.2.40.0080.00019.88
8.2.30.0040.00418.15
8.2.20.0030.00517.66
8.2.10.0030.00517.98
8.2.00.0000.00717.59
8.1.280.0070.01325.92
8.1.270.0040.00423.96
8.1.260.0040.00426.35
8.1.250.0050.00328.09
8.1.240.0040.00423.74
8.1.230.0060.00619.22
8.1.220.0040.00417.74
8.1.210.0030.00718.77
8.1.200.0060.00317.10
8.1.190.0040.00417.11
8.1.180.0050.00318.10
8.1.170.0040.00418.50
8.1.160.0050.00222.04
8.1.150.0040.00418.61
8.1.140.0080.00017.32
8.1.130.0030.00317.63
8.1.120.0000.00817.35
8.1.110.0000.00717.22
8.1.100.0030.00317.39
8.1.90.0070.00017.42
8.1.80.0080.00017.44
8.1.70.0030.00317.27
8.1.60.0030.00617.40
8.1.50.0030.00617.30
8.1.40.0000.00817.44
8.1.30.0000.00917.56
8.1.20.0000.00817.57
8.1.10.0000.00817.31
8.1.00.0000.00817.26
8.0.300.0000.00718.77
8.0.290.0040.00416.75
8.0.280.0000.00718.36
8.0.270.0030.00317.26
8.0.260.0000.00617.09
8.0.250.0070.00016.84
8.0.240.0050.00316.96
8.0.230.0070.00016.86
8.0.220.0030.00316.84
8.0.210.0030.00316.86
8.0.200.0060.00016.76
8.0.190.0030.00516.77
8.0.180.0030.00516.80
8.0.170.0000.00816.87
8.0.160.0070.00016.75
8.0.150.0050.00216.80
8.0.140.0000.00716.78
8.0.130.0060.00013.27
8.0.120.0050.00316.75
8.0.110.0000.00816.68
8.0.100.0040.00416.68
8.0.90.0050.00316.71
8.0.80.0070.00716.80
8.0.70.0070.00016.88
8.0.60.0070.00016.77
8.0.50.0050.00216.79
8.0.30.0140.00617.07
8.0.20.0110.00917.40
8.0.10.0040.00416.87
8.0.00.0110.00916.68
7.4.330.0030.00315.00
7.4.320.0070.00016.57
7.4.300.0030.00316.55
7.4.290.0000.00716.53
7.4.280.0030.00316.45
7.4.270.0000.00716.32
7.4.260.0030.00316.41
7.4.250.0000.00716.50
7.4.240.0070.00016.56
7.4.230.0030.00316.28
7.4.220.0070.01116.61
7.4.210.0200.00016.62
7.4.200.0000.00716.50
7.4.160.0060.00916.50
7.4.150.0070.01017.40
7.4.140.0140.00317.86
7.4.130.0110.00616.41
7.4.120.0070.00916.40
7.4.110.0140.00316.68
7.4.100.0120.00816.50
7.4.90.0080.00816.50
7.4.80.0060.01019.39
7.4.70.0070.01016.37
7.4.60.0110.00716.45
7.4.50.0060.00316.52
7.4.40.0080.00816.54
7.4.30.0090.00616.47
7.4.00.0070.01014.96
7.3.330.0050.00013.05
7.3.320.0060.00013.25
7.3.310.0000.00716.17
7.3.300.0030.00316.31
7.3.290.0060.00716.27
7.3.280.0050.01216.31
7.3.270.0120.00617.40
7.3.260.0080.00916.63
7.3.250.0120.00816.36
7.3.240.0060.01416.58
7.3.230.0070.01016.41
7.3.210.0070.01016.34
7.3.200.0130.00619.39
7.3.190.0090.01216.56
7.3.180.0210.00016.34
7.3.170.0080.00816.58
7.3.160.0040.01216.33
7.3.120.0080.01014.82
7.3.110.0000.01314.79
7.3.100.0070.00614.79
7.3.90.0060.00814.84
7.3.80.0100.00314.90
7.3.70.0060.00914.90
7.3.60.0060.00314.91
7.3.50.0030.01014.59
7.3.40.0070.00714.97
7.3.30.0040.01414.88
7.3.20.0060.00316.61
7.3.10.0070.00416.44
7.3.00.0100.00316.62
7.2.330.0100.00716.57
7.2.320.0070.01116.66
7.2.310.0030.01516.40
7.2.300.0120.00416.29
7.2.290.0170.00816.25
7.2.250.0060.01314.97
7.2.240.0030.01415.02
7.2.230.0110.00414.99
7.2.220.0060.00715.02
7.2.210.0040.01114.58
7.2.200.0040.00415.05
7.2.190.0060.00914.99
7.2.180.0030.01014.71
7.2.170.0030.00614.94
7.2.60.0230.00016.92
7.2.50.0030.00716.70
7.1.330.0040.01115.82
7.1.320.0110.00315.82
7.1.310.0070.00715.85
7.1.300.0100.00015.75
7.1.290.0040.00715.80
7.1.280.0070.00415.45
7.1.270.0070.00715.66
7.1.260.0030.00615.90
7.1.200.0040.00715.96
7.1.100.0000.01318.38
7.1.70.0000.00816.87
7.1.60.0000.02419.70
7.1.50.0110.01416.84
7.1.00.0030.07722.45
7.0.200.0000.00816.75
7.0.140.0000.07722.21
7.0.60.0030.06719.91
7.0.50.0100.08317.66
7.0.40.0130.04720.25
7.0.30.0300.05720.16
7.0.20.0200.04320.00
7.0.10.0270.08020.16
7.0.00.0030.08020.30
5.6.280.0070.07021.02
5.6.210.0030.08320.46
5.6.200.0000.04318.21
5.6.190.0070.04020.60
5.6.180.0370.07320.41
5.6.170.0070.05020.48
5.6.160.0070.08020.48
5.6.150.0100.04318.21
5.6.140.0030.04018.15
5.6.130.0030.09018.09
5.6.120.0030.04020.97
5.6.110.0070.08721.11
5.6.100.0070.03720.97
5.6.90.0100.08721.04
5.6.80.0100.03320.43
5.6.70.3970.04020.36
5.5.350.0130.08320.51
5.5.340.0070.04718.02
5.5.330.0000.04720.25
5.5.320.0400.06720.30
5.5.310.0270.06320.28
5.5.300.0170.07017.87
5.5.290.0100.07718.00
5.5.280.0070.03720.64
5.5.270.0170.04720.79
5.5.260.0130.06720.68
5.5.250.0170.03020.58
5.5.240.0070.07020.18
5.4.450.3030.04719.21
5.4.440.2470.04319.46
5.4.430.3530.03719.56
5.4.420.3600.04019.07
5.4.410.3600.03719.29
5.4.400.3370.04319.25
5.4.390.3500.03718.79
5.4.380.3130.04018.81
5.4.370.3470.03319.13
5.4.360.3470.04019.08
5.4.350.3830.03319.24
5.4.340.3500.03019.16
5.4.320.3100.04319.13
5.4.310.4170.03019.16
5.4.300.3670.03718.78
5.4.290.3500.04019.08
5.4.280.3630.03718.82
5.4.270.3370.03719.21
5.4.260.3270.04319.15
5.4.250.0030.03719.08
5.4.240.3600.03719.12
5.4.230.3330.03319.13
5.4.220.3500.03718.91
5.4.210.3370.04018.88
5.4.200.3370.04018.88
5.4.190.3670.03019.25
5.4.180.3400.04018.92
5.4.170.3430.03319.14
5.4.160.3530.03718.76
5.4.150.3700.04019.05
5.4.140.0070.06016.46
5.4.130.1370.04716.25
5.4.120.3330.03716.28
5.4.110.4070.03316.50
5.4.100.4100.03716.43
5.4.90.4170.03016.20
5.4.80.3800.04716.45
5.4.70.3500.04016.32
5.4.60.3600.03716.19
5.4.50.3600.03716.28
5.4.40.3670.05316.28
5.4.30.3730.04716.43
5.4.20.3530.03316.41
5.4.10.3300.04016.41
5.4.00.3430.03715.68
5.3.290.3870.04314.50
5.3.280.3300.03314.43
5.3.270.3500.04014.45
5.3.260.3600.04014.55
5.3.250.0500.05714.69
5.3.240.0030.05714.55
5.3.230.4230.04014.54
5.3.220.4030.02714.47
5.3.210.3530.03014.50
5.3.200.3630.03314.45
5.3.190.4300.03714.44
5.3.180.4200.03314.41
5.3.170.3670.03014.50
5.3.160.3530.03714.50
5.3.150.3600.03714.39
5.3.140.3330.03014.53
5.3.130.3530.03714.41
5.3.120.3570.03714.59
5.3.110.3630.04014.38
5.3.100.3630.03713.97
5.3.90.3870.03713.86
5.3.80.4370.02313.87
5.3.70.4000.03313.92

preferences:
35.55 ms | 401 KiB | 5 Q