3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isCorrect($string) { $len = strlen($string); $stack = []; for( $i = 0; i < $len; ++$i) { if ($string[i] == '(') array_push($stack, $string[i]); else if($string[i] == ')') { if ( empty($stack) === false) array_pop($stack); else return false; } } return empty($stack); } $string = '((()))'; isCorrect($string); //var_dump(isCorrect($string)); //var_dump(strlen($string) % 2); //assert(isCorrect('') === true); //assert(isCorrect('()') === true); //assert(isCorrect('{()}') === true); //assert(isCorrect('{()}{}') === true); //assert(isCorrect('(())') === true); //assert(isCorrect('{({({({()})})})}') === true); //assert(isCorrect('{(})') === false);

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)
8.3.60.0100.01018.68
8.3.50.0110.00822.04
8.3.40.0070.01418.59
8.3.30.0100.00319.07
8.3.20.0000.00720.28
8.3.10.0080.00023.78
8.3.00.0050.00319.38
8.2.180.0110.01117.00
8.2.170.0100.00722.96
8.2.160.0070.01019.33
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0000.00922.26
8.2.110.0080.00020.54
8.2.100.0080.00417.91
8.2.90.0030.00617.75
8.2.80.0040.00418.86
8.2.70.0040.00417.63
8.2.60.0000.00717.93
8.2.50.0050.00318.07
8.2.40.0050.00319.89
8.2.30.0000.00917.95
8.2.20.0040.00417.81
8.2.10.0000.00818.04
8.2.00.0030.00517.87
8.1.280.0070.00725.92
8.1.270.0060.00323.90
8.1.260.0040.00426.35
8.1.250.0030.00628.09
8.1.240.0060.00322.16
8.1.230.0030.00921.00
8.1.220.0040.00417.91
8.1.210.0050.00318.77
8.1.200.0050.00317.48
8.1.190.0000.00817.23
8.1.180.0000.00918.10
8.1.170.0050.00318.68
8.1.160.0070.00021.95
8.1.150.0000.00818.88
8.1.140.0000.00717.38
8.1.130.0000.00717.87
8.1.120.0000.00717.52
8.1.110.0050.00217.50
8.1.100.0040.00417.37
8.1.90.0030.00517.41
8.1.80.0070.00017.48
8.1.70.0030.00317.43
8.1.60.0000.00917.48
8.1.50.0040.00417.52
8.1.40.0030.00617.51
8.1.30.0000.00817.65
8.1.20.0060.00317.62
8.1.10.0030.00517.55
8.1.00.0030.00617.52
8.0.300.0090.00019.84
8.0.290.0040.00416.88
8.0.280.0030.00318.45
8.0.270.0000.00717.21
8.0.260.0030.00317.14
8.0.250.0040.00317.09
8.0.240.0030.00317.04
8.0.230.0090.00016.90
8.0.220.0030.00316.99
8.0.210.0030.00316.98
8.0.200.0000.00617.04
8.0.190.0030.00517.01
8.0.180.0040.00416.99
8.0.170.0000.00816.90
8.0.160.0000.00817.02
8.0.150.0000.00816.96
8.0.140.0000.00816.94
8.0.130.0030.00313.38
8.0.120.0050.00316.91
8.0.110.0030.00516.96
8.0.100.0040.00416.91
8.0.90.0000.00716.86
8.0.80.0100.00716.87
8.0.70.0040.00416.78
8.0.60.0030.00516.84
8.0.50.0050.00317.01
8.0.30.0090.01017.07
8.0.20.0120.01017.40
8.0.10.0050.00217.06
8.0.00.0130.00416.87
7.4.330.0030.00315.02
7.4.320.0030.00316.39
7.4.300.0030.00316.46
7.4.290.0080.00016.48
7.4.280.0000.01016.37
7.4.270.0030.00316.44
7.4.260.0040.00416.52
7.4.250.0080.00016.37
7.4.240.0040.00416.38
7.4.230.0040.00416.58
7.4.220.0030.01716.35
7.4.210.0070.01016.45
7.4.200.0040.00416.38
7.4.160.0330.01616.42
7.4.150.0400.01217.40
7.4.140.0120.01017.86
7.4.130.0290.00516.45
7.4.120.0130.01316.53
7.4.110.0490.01316.54
7.4.100.0330.01716.40
7.4.90.0150.00416.50
7.4.80.1350.02419.39
7.4.70.0100.01016.49
7.4.60.0040.01516.43
7.4.50.0000.00916.38
7.4.40.0130.01016.38
7.4.30.0100.01416.41
7.4.00.0040.01414.52
7.3.330.0030.00313.30
7.3.320.0030.00313.46
7.3.310.0050.00216.41
7.3.300.0020.00516.25
7.3.290.0090.00816.24
7.3.280.0060.00916.31
7.3.270.0440.00917.40
7.3.260.0310.00916.32
7.3.250.0160.01416.35
7.3.240.0640.01016.54
7.3.230.0440.01316.59
7.3.210.0120.00816.25
7.3.200.0070.01419.39
7.3.190.0030.01416.50
7.3.180.0030.01616.28
7.3.170.1210.02116.42
7.3.160.0070.01116.45
7.2.330.0710.03516.82
7.2.320.0720.02116.79
7.2.310.0120.00616.73
7.2.300.0130.00316.62
7.2.290.0570.00416.69
7.2.80.0060.00916.79
7.2.60.0100.00316.67
7.1.200.0110.00715.90
7.1.70.0220.00416.90
7.1.60.0090.00619.11
7.1.50.0090.00917.16
7.1.00.0030.08022.41
7.0.200.0000.01016.98
7.0.140.0030.07322.00
7.0.60.0200.06720.04
7.0.50.0100.04317.78
7.0.40.0100.04719.89
7.0.30.0230.04019.82
7.0.20.0100.04719.95
7.0.10.0200.05019.97
7.0.00.0030.04019.77
5.6.280.0100.09021.12
5.6.210.0070.03720.48
5.6.200.0130.07318.17
5.6.190.0070.07020.35
5.6.180.0370.06720.47
5.6.170.0400.06020.49
5.6.160.0030.07720.45
5.6.150.0030.04018.16
5.6.140.0030.07318.16
5.6.130.0030.06018.13
5.6.120.0070.04321.02
5.6.110.0200.06721.00
5.6.100.0030.05321.02
5.6.90.0030.04021.06
5.6.80.0000.05320.45
5.6.70.0270.07020.43
5.5.350.0070.07020.54
5.5.340.0130.07317.94
5.5.330.0130.06320.23
5.5.320.0130.06020.23
5.5.310.0170.06020.20
5.5.300.0100.08017.95
5.5.290.0100.06017.94
5.5.280.0130.05320.90
5.5.270.0030.04020.89
5.5.260.0000.04320.70
5.5.250.0100.03320.53
5.5.240.0100.07320.18
5.4.450.0200.08319.51
5.4.440.0000.04019.28
5.4.430.0370.05719.52
5.4.420.0270.07019.23
5.4.410.0200.06319.17
5.4.400.3930.04019.20
5.4.390.3730.03719.03
5.4.380.0270.06319.04
5.4.370.0200.07319.21
5.4.360.0270.07019.02
5.4.350.0270.07018.79
5.4.340.0070.03612.07
5.4.320.0100.03612.54
5.4.310.0120.03412.54
5.4.300.0100.04312.54
5.4.290.0070.03812.54
5.4.280.0070.03612.45
5.4.270.0030.03912.42
5.4.260.0070.03712.43
5.4.250.0060.04212.43
5.4.240.0090.03412.44
5.4.230.0070.04012.43
5.4.220.0080.03612.41
5.4.210.0060.03912.43
5.4.200.0030.04312.44
5.4.190.0100.03812.42
5.4.180.0080.04112.43
5.4.170.0050.03912.43
5.4.160.0080.03612.44
5.4.150.0090.03612.41
5.4.140.0050.04512.11
5.4.130.0070.04212.10
5.4.120.0070.03712.06
5.4.110.0080.03612.05
5.4.100.0060.04012.05
5.4.90.0110.04412.06
5.4.80.0070.04112.05
5.4.70.0110.03512.05
5.4.60.0060.03612.05
5.4.50.0090.03412.05
5.4.40.0070.07016.58
5.4.30.0000.04316.55
5.4.20.0270.06316.25
5.4.10.0330.06716.26
5.4.00.4300.02715.82

preferences:
40.81 ms | 401 KiB | 5 Q