3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'this is a string'; // Test 1 if (isset($string['check'][0])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 2 if (isset($string[0])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 3 if (isset($string['check'])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 4 if (isset($string['check'][100])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; var_dump($string['check'][0]); // Warning throw out

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)
8.3.60.0140.00718.43
8.3.50.0110.00720.96
8.3.40.0140.00018.77
8.3.30.0130.00020.39
8.3.20.0050.00318.91
8.3.10.0050.00321.04
8.3.00.0050.00323.36
8.2.180.0130.00616.75
8.2.170.0070.00722.96
8.2.160.0100.01020.35
8.2.150.0040.01124.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00419.79
8.2.110.0090.00022.24
8.2.100.0090.00317.91
8.2.90.0000.00719.16
8.2.80.0070.00019.20
8.2.70.0090.00017.63
8.2.60.0090.00018.05
8.2.50.0090.00318.07
8.2.40.0000.00819.94
8.2.30.0000.00719.39
8.2.20.0000.00717.71
8.2.10.0040.00417.78
8.2.00.0000.00817.83
8.1.280.0070.00725.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00322.61
8.1.230.0000.01120.99
8.1.220.0000.00818.77
8.1.210.0040.00818.77
8.1.200.0000.00817.25
8.1.190.0040.00417.41
8.1.180.0000.00818.10
8.1.170.0080.00018.71
8.1.160.0000.00718.81
8.1.150.0040.00418.57
8.1.140.0040.00417.44
8.1.130.0030.00317.71
8.1.120.0080.00017.45
8.1.110.0020.00517.40
8.1.100.0050.00317.29
8.1.90.0030.00517.36
8.1.80.0050.00317.30
8.1.70.0040.00417.39
8.1.60.0000.00817.53
8.1.50.0000.00717.48
8.1.40.0000.00717.49
8.1.30.0050.00317.50
8.1.20.0050.00317.55
8.1.10.0000.00817.54
8.1.00.0040.00417.37
8.0.300.0000.00820.04
8.0.290.0070.00017.04
8.0.280.0000.00818.46
8.0.270.0070.00017.19
8.0.260.0030.00316.80
8.0.250.0000.00816.97
8.0.240.0030.00616.86
8.0.230.0000.00716.95
8.0.220.0030.00316.94
8.0.210.0030.00316.79
8.0.200.0000.00716.89
8.0.190.0070.00416.98
8.0.180.0040.00716.95
8.0.170.0050.00316.77
8.0.160.0000.00716.86
8.0.150.0000.00716.91
8.0.140.0050.00516.82
8.0.130.0060.00013.41
8.0.120.0040.00416.77
8.0.110.0050.00216.96
8.0.100.0030.00516.77
8.0.90.0040.00416.90
8.0.80.0040.01116.84
8.0.70.0000.00716.73
8.0.60.0040.00416.77
8.0.50.0030.00616.93
8.0.30.0120.00717.21
8.0.20.0130.00817.40
8.0.10.0040.00416.97
8.0.00.0110.01116.79
7.4.330.0000.00516.76
7.4.320.0060.00016.52
7.4.300.0030.00316.55
7.4.290.0030.00416.43
7.4.280.0060.00016.42
7.4.270.0000.00716.47
7.4.260.0050.00013.22
7.4.250.0000.00716.49
7.4.240.0040.00416.52
7.4.230.0000.00716.46
7.4.220.0180.00616.41
7.4.210.0070.00816.45
7.4.200.0030.00316.52
7.4.190.0050.00216.58
7.4.160.0100.00716.37
7.4.150.0130.00617.40
7.4.140.0110.01417.86
7.4.130.0110.00516.62
7.4.120.0030.01416.40
7.4.110.0110.00716.44
7.4.100.0100.00616.59
7.4.90.0050.01316.48
7.4.80.0090.01319.39
7.4.70.0070.01416.32
7.4.60.0110.00716.35
7.4.50.0000.00716.59
7.4.40.0090.00622.77
7.4.30.0140.00516.61
7.4.00.0000.01514.85
7.3.330.0000.00513.07
7.3.320.0000.00513.12
7.3.310.0040.00416.13
7.3.300.0000.00716.34
7.3.290.0070.00716.48
7.3.280.0110.00416.44
7.3.270.0100.00717.40
7.3.260.0120.00818.24
7.3.250.0070.01116.39
7.3.240.0060.01016.43
7.3.230.0040.01516.48
7.3.210.0080.00816.39
7.3.200.0060.01519.39
7.3.190.0060.01516.38
7.3.180.0070.01016.32
7.3.170.0100.01316.28
7.3.160.0070.00716.28
7.3.120.0070.01014.90
7.2.330.0140.00316.79
7.2.320.0100.01316.66
7.2.310.0090.01216.78
7.2.300.0030.01316.32
7.2.290.0060.00916.64
7.2.110.0110.00716.59
7.2.60.0090.00616.98
7.2.00.0030.00919.13
7.1.200.0030.00715.73
7.1.70.0000.01017.04
7.1.60.0030.01317.25
7.1.50.0140.01016.86
7.1.00.0030.03322.30
7.0.200.0030.01016.81
7.0.140.0030.07322.18
7.0.110.0100.07319.94
7.0.100.0170.07319.89
7.0.90.0130.07719.96
7.0.80.0230.07320.07
7.0.70.0100.04320.01
7.0.60.0170.08020.04
7.0.50.0170.07019.98
7.0.40.0230.05319.70
7.0.30.0100.07719.87
7.0.20.0070.07719.72
7.0.10.0070.05019.72
7.0.00.0030.08319.86
5.6.280.0100.06721.09
5.6.260.0170.07020.66
5.6.250.0000.08020.50
5.6.240.0100.08720.64
5.6.230.0070.08020.54
5.6.220.0070.06020.67
5.6.210.0070.04320.39
5.6.200.0070.05020.64
5.6.190.0030.04320.58
5.6.180.0070.07320.61
5.6.170.0100.08020.65
5.6.160.0100.03320.56
5.6.150.0130.06320.64
5.6.140.0000.09020.61
5.6.130.0070.08320.63
5.6.120.0030.07020.69
5.6.110.0000.08720.57
5.6.100.0100.07320.61
5.6.90.0100.07720.44
5.6.80.0100.03720.07
5.6.70.0030.04320.02
5.6.60.0130.07020.01
5.6.50.0030.07319.97
5.6.40.0130.06319.98
5.6.30.0170.06720.01
5.6.20.0130.07019.94
5.6.10.0100.08319.82
5.6.00.0130.07019.96
5.5.380.0200.07017.53
5.5.370.0070.04717.53
5.5.360.0030.05017.62
5.5.350.0130.07317.40
5.5.340.0000.04717.77
5.5.330.0000.04018.16
5.5.320.0070.03318.06
5.5.310.0030.07017.84
5.5.300.0000.05317.85
5.5.290.0000.04318.16
5.5.280.0100.07718.02
5.5.270.0030.07018.09
5.5.260.0030.03717.83
5.5.250.0130.06717.66
5.5.240.0070.06717.54
5.5.230.0100.04317.50
5.5.220.0030.07717.36
5.5.210.0070.08017.22
5.5.200.0030.07717.22
5.5.190.0070.07017.48
5.5.180.0130.06717.34
5.5.160.0130.07317.60
5.5.150.0070.07017.50
5.5.140.0070.05717.24
5.5.130.0100.07017.49
5.5.120.0070.07717.44
5.5.110.0070.07017.11
5.5.100.0100.07017.03
5.5.90.0130.07017.11
5.5.80.0100.07317.34
5.5.70.0070.05017.27
5.5.60.0100.07017.10
5.5.50.0070.03717.40
5.5.40.0030.07717.00
5.5.30.0030.04717.22
5.5.20.0100.04017.37
5.5.10.0100.06317.10
5.5.00.0030.04317.21
5.4.450.0000.05319.45
5.4.440.0170.07019.25
5.4.430.0030.08319.41
5.4.420.0070.03019.30
5.4.410.0070.07719.20
5.4.400.0030.07019.08
5.4.390.0030.07319.16
5.4.380.0070.03719.17
5.4.370.0070.07319.01
5.4.360.0130.04318.98
5.4.350.0070.07019.12
5.4.340.0030.07018.94
5.4.320.0030.07019.13
5.4.310.0070.07018.97
5.4.300.0000.07719.24
5.4.290.0070.07019.12
5.4.280.0070.08319.15
5.4.270.0170.06719.15
5.4.260.0100.08019.00
5.4.250.0130.06718.99
5.4.240.0130.07718.95
5.4.230.0100.04719.15
5.4.220.0000.04718.99
5.4.210.0130.05018.93
5.4.200.0070.05319.15
5.4.190.0030.04318.95
5.4.180.0100.07318.99
5.4.170.0100.03719.04
5.4.160.0070.04719.08
5.4.150.0030.04719.13
5.4.140.0100.03716.18
5.4.130.0030.04016.32
5.4.120.0030.03716.20
5.4.110.0070.03716.41
5.4.100.0070.05016.23
5.4.90.0000.04016.27
5.4.80.0000.04016.35
5.4.70.0030.03316.49
5.4.60.0030.07016.34
5.4.50.0100.04016.20
5.4.40.0100.03316.40
5.4.30.0030.05316.46
5.4.20.0070.04716.37
5.4.10.0030.05716.25
5.4.00.0000.04015.71
5.3.290.0000.05314.56
5.3.280.0030.05714.66
5.3.270.0070.03714.45
5.3.260.0000.04314.45
5.3.250.0130.05314.39
5.3.240.0100.05714.53
5.3.230.0030.04714.52
5.3.220.0070.06714.50
5.3.210.0070.06314.57
5.3.200.0070.05714.63
5.3.190.0100.06714.39
5.3.180.0030.05014.45
5.3.170.0030.03714.56
5.3.160.0030.03714.50
5.3.150.0100.03314.35
5.3.140.0070.05314.62
5.3.130.0030.06714.49
5.3.120.0030.06714.38
5.3.110.0030.04014.49
5.3.100.0030.03713.84
5.3.90.0030.03714.08
5.3.80.0030.03713.96
5.3.70.0070.03714.03
5.3.60.0030.03713.88
5.3.50.0100.03713.84
5.3.40.0070.06013.84
5.3.30.0070.03313.98
5.3.20.0000.04013.71
5.3.10.0070.05713.71
5.3.00.0030.05313.56
5.2.170.0000.03011.08
5.2.160.0030.03011.05
5.2.150.0000.03311.08
5.2.140.0070.02711.08
5.2.130.0030.03011.08
5.2.120.0000.03011.16
5.2.110.0030.03311.04
5.2.100.0100.03011.05
5.2.90.0070.03011.26
5.2.80.0100.03711.25
5.2.70.0030.03711.00
5.2.60.0070.02710.95
5.2.50.0030.02310.94
5.2.40.0170.02711.06
5.2.30.0000.03710.91
5.2.20.0070.02710.95
5.2.10.0000.03310.71
5.2.00.0030.02710.70
5.1.60.0070.02010.14
5.1.50.0000.02710.05
5.1.40.0000.0309.88
5.1.30.0000.02710.24
5.1.20.0030.02710.43
5.1.10.0000.03010.23
5.1.00.0030.0439.89
5.0.50.0000.0279.75
5.0.40.0030.0479.75
5.0.30.0000.0609.75
5.0.20.0030.0279.75
5.0.10.0030.0209.75
5.0.00.0070.0439.75
4.4.90.0030.0109.75
4.4.80.0000.0179.75
4.4.70.0070.0109.75
4.4.60.0030.0139.75
4.4.50.0000.0179.75
4.4.40.0000.0239.75
4.4.30.0030.0139.75
4.4.20.0000.0209.75
4.4.10.0030.0209.75
4.4.00.0070.0309.75
4.3.110.0030.0339.75
4.3.100.0000.0409.75
4.3.90.0030.0139.75
4.3.80.0030.0409.75
4.3.70.0030.0309.75
4.3.60.0000.0239.75
4.3.50.0000.0179.75
4.3.40.0000.0339.75
4.3.30.0000.0309.75
4.3.20.0000.0379.75
4.3.10.0070.0239.75
4.3.00.0000.0409.75

preferences:
45.15 ms | 401 KiB | 5 Q