3v4l.org

run code in 300+ PHP versions simultaneously
<?php function get_variables($code) { // get all the tokens $tokens = token_get_all("<?php $code ?>"); // filter out non-variables $tokens = array_filter($tokens, function ($t) { return $t[0] == T_VARIABLE; }); // return the variable names return array_column($tokens, 1); } print_r(get_variables('$isTrue ? $a : $b')); print_r(get_variables('$a=$b * ($c + 1)'));

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)
8.3.110.0130.00320.94
8.3.100.0060.00324.06
8.3.90.0110.00426.77
8.3.80.0090.00016.50
8.3.70.0150.00316.63
8.3.60.0110.00418.31
8.3.50.0040.01118.11
8.3.40.0110.00418.67
8.3.30.0040.01118.90
8.3.20.0040.00424.18
8.3.10.0050.00324.66
8.3.00.0000.00726.16
8.2.230.0070.00022.58
8.2.220.0100.01037.54
8.2.210.0040.00426.77
8.2.200.0090.00016.50
8.2.190.0120.00316.71
8.2.180.0080.00625.92
8.2.170.0060.01018.73
8.2.160.0070.01122.96
8.2.150.0070.00025.66
8.2.140.0070.00024.66
8.2.130.0050.00326.16
8.2.120.0090.00020.36
8.2.110.0000.01121.98
8.2.100.0080.00319.21
8.2.90.0040.00419.36
8.2.80.0080.00019.19
8.2.70.0060.00317.62
8.2.60.0000.00818.05
8.2.50.0040.00418.07
8.2.40.0050.00318.34
8.2.30.0030.00618.13
8.2.20.0000.00718.10
8.2.10.0050.00219.28
8.2.00.0000.00819.23
8.1.290.0000.00830.84
8.1.280.0130.00325.92
8.1.270.0160.00020.78
8.1.260.0050.00326.35
8.1.250.0000.00928.09
8.1.240.0060.00323.96
8.1.230.0110.00019.06
8.1.220.0040.00417.74
8.1.210.0050.00318.77
8.1.200.0090.00017.35
8.1.190.0060.00317.52
8.1.180.0030.00518.84
8.1.170.0080.00018.44
8.1.160.0000.00718.91
8.1.150.0050.00218.95
8.1.140.0000.00718.82
8.1.130.0030.00320.11
8.1.120.0000.00717.49
8.1.110.0000.00817.45
8.1.100.0020.00517.38
8.1.90.0040.00417.42
8.1.80.0060.00317.45
8.1.70.0070.00017.50
8.1.60.0030.00517.61
8.1.50.0050.00317.51
8.1.40.0060.00317.53
8.1.30.0090.00017.67
8.1.20.0000.00917.65
8.1.10.0030.00717.44
8.1.00.0090.00017.50
8.0.300.0040.00418.77
8.0.290.0040.00417.05
8.0.280.0080.00018.36
8.0.270.0000.00717.93
8.0.260.0030.00318.38
8.0.250.0000.00716.81
8.0.240.0030.00316.89
8.0.230.0030.00317.00
8.0.220.0000.00716.81
8.0.210.0030.00316.79
8.0.200.0030.00316.85
8.0.190.0000.00816.95
8.0.180.0040.00416.91
8.0.170.0060.00316.87
8.0.160.0040.00416.93
8.0.150.0030.00316.86
8.0.140.0090.00316.69
8.0.130.0000.00613.29
8.0.120.0000.01016.76
8.0.110.0040.00416.69
8.0.100.0040.00416.78
8.0.90.0040.00416.88
8.0.80.0100.00816.90
8.0.70.0040.00416.79
8.0.60.0030.00516.77
8.0.50.0040.00416.96
8.0.30.0070.01116.91
8.0.20.0090.01316.96
8.0.10.0130.00916.95
8.0.00.0000.01716.99
7.4.330.0030.00315.55
7.4.320.0060.00016.47
7.4.300.0070.00016.41
7.4.290.0080.00016.34
7.4.280.0050.00316.58
7.4.270.0070.00016.62
7.4.260.0050.00013.29
7.4.250.0030.00316.52
7.4.240.0040.00416.53
7.4.230.0030.00316.35
7.4.220.0020.00516.49
7.4.210.0100.00616.57
7.4.200.0030.00516.51
7.4.160.0070.01116.61
7.4.150.0070.01016.60
7.4.140.0170.00316.43
7.4.130.0030.01216.47
7.4.120.0040.01116.37
7.4.110.0100.00616.51
7.4.100.0060.01016.65
7.4.90.0090.00716.46
7.4.80.0160.00616.44
7.4.70.0060.01616.54
7.4.60.0060.00916.54
7.4.50.0060.00916.32
7.4.40.0070.00716.34
7.4.30.0070.01416.36
7.4.20.0160.00016.43
7.4.10.0130.01016.36
7.4.00.0070.00716.37
7.3.330.0030.00316.16
7.3.320.0030.00313.38
7.3.310.0030.00316.21
7.3.300.0060.00016.19
7.3.290.0100.00616.32
7.3.270.0060.01216.34
7.3.260.0130.00716.32
7.3.250.0060.01016.19
7.3.240.0040.01416.27
7.3.230.0130.00316.29
7.3.220.0060.01216.27
7.3.210.0070.01416.29
7.3.200.0120.00916.27
7.3.190.0100.01016.26
7.3.180.0130.00316.20
7.3.170.0080.00516.27
7.3.160.0140.00016.27
7.3.150.0120.00816.28
7.3.140.0110.01116.29
7.3.130.0040.01116.39
7.3.120.0080.00616.16
7.3.110.0120.00316.15
7.3.100.0070.01016.11
7.3.90.0070.01116.47
7.3.80.0160.00616.29
7.3.70.0100.01016.39
7.3.60.0070.00916.40
7.3.50.0090.00716.46
7.3.40.0120.00616.50
7.3.30.0040.01216.48
7.3.20.0030.01716.43
7.3.10.0120.00916.45
7.3.00.0100.01016.45

preferences:
64.93 ms | 403 KiB | 5 Q