3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1, 2, 3, 4, 3, 2, 1]; $j = count($a) - 1; echo $j; $output = []; for($i = 0; $i > count($a); $i++) { echo $a[$i] ." ". $a[$j]; if ($a[$i] !== $a[$j]) { $output = $a[$i]; } $j--; } print_r($output);

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)
8.3.60.0160.00018.30
8.3.50.0110.00719.95
8.3.40.0070.00719.45
8.3.30.0040.01118.59
8.3.20.0040.00424.18
8.3.10.0040.00424.66
8.3.00.0040.00426.16
8.2.180.0060.00925.92
8.2.170.0120.00918.91
8.2.160.0090.00422.96
8.2.150.0070.00025.66
8.2.140.0060.00324.66
8.2.130.0070.00026.16
8.2.120.0080.00026.16
8.2.110.0100.00019.32
8.2.100.0050.00517.91
8.2.90.0000.00917.59
8.2.80.0000.00818.79
8.2.70.0050.00317.50
8.2.60.0050.00317.63
8.2.50.0040.00418.04
8.2.40.0040.00418.22
8.2.30.0070.00018.13
8.2.20.0000.00719.13
8.2.10.0030.00318.04
8.2.00.0000.00719.37
8.1.280.0070.01025.92
8.1.270.0030.00624.66
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0090.00019.50
8.1.230.0070.00420.97
8.1.220.0000.00818.70
8.1.210.0000.00818.77
8.1.200.0000.00817.25
8.1.190.0040.00417.35
8.1.180.0030.00618.10
8.1.170.0040.00417.62
8.1.160.0070.00319.08
8.1.150.0000.00718.64
8.1.140.0070.00017.46
8.1.130.0030.00319.07
8.1.120.0040.00317.46
8.1.110.0050.00317.44
8.1.100.0040.00417.33
8.1.90.0120.00217.32
8.1.80.0120.00317.50
8.1.70.0040.01217.40
8.1.60.0060.01217.45
8.1.50.0150.00317.49
8.1.40.0110.00717.52
8.1.30.0150.00317.70
8.1.20.0150.00317.60
8.1.10.0090.00917.36
8.1.00.0180.00017.44
8.0.300.0050.00218.77
8.0.290.0060.00316.75
8.0.280.0040.00418.36
8.0.270.0030.00516.86
8.0.260.0030.00318.38
8.0.250.0050.00316.87
8.0.240.0030.00316.91
8.0.230.0050.00216.80
8.0.220.0000.01416.69
8.0.210.0130.00216.70
8.0.200.0110.00416.85
8.0.190.0090.00516.79
8.0.180.0070.00716.68
8.0.170.0130.00216.88
8.0.160.0150.00216.91
8.0.150.0080.00816.80
8.0.140.0140.00016.87
8.0.130.0070.00716.73
8.0.120.0140.00016.87
8.0.110.0140.00016.77
8.0.100.0060.00916.85
8.0.90.0080.00516.85
8.0.80.0070.00316.82
8.0.70.0090.00416.68
8.0.60.0060.00616.80
8.0.50.0090.00316.89
8.0.30.0110.00416.80
8.0.20.0030.00916.72
8.0.10.0060.00616.99
7.4.330.0030.00315.55
7.4.320.0060.00016.62
7.4.300.0080.00816.44
7.4.290.0090.00616.51
7.4.280.0140.00316.55
7.4.270.0130.00316.66
7.4.260.0130.00316.47
7.4.250.0050.01016.55
7.4.240.0060.00616.32
7.4.230.0080.00316.47
7.4.220.0040.00816.60
7.4.210.0060.00316.50
7.4.200.0060.00316.55
7.4.190.0060.00616.62
7.4.180.0090.00016.53
7.4.160.0000.01016.54
7.4.150.0080.00316.38
7.4.140.0030.00916.40
7.4.130.0100.00216.40
7.4.120.0070.00416.41
7.4.110.0060.00616.30
7.4.100.0120.00016.53
7.4.90.0000.01016.29
7.4.80.0110.00016.34
7.4.70.0070.00316.24
7.4.60.0050.00516.42
7.4.50.0100.00016.34
7.4.40.0060.00316.25
7.4.30.0040.00716.45
7.4.20.0040.00716.29
7.4.10.0040.00416.05
7.4.00.0040.00416.45

preferences:
32.97 ms | 400 KiB | 5 Q