3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isCorrect($string) { $len = strlen($string); $stack = array(); for( $i = 0; $i < $len; ++$i) { if ( $string[$i] == '(' || $string[$i] == '{' || $string[$i] == '[') array_push($stack, $string[$i]); elseif( $string[$i] == ')' || $string[$i] == '}' || $string[$i] == ']') { if ( empty($stack) === false ) array_pop($stack); else return false; } } return empty($stack); } 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)
8.3.60.0120.00918.43
8.3.50.0120.01222.01
8.3.40.0090.00618.80
8.3.30.0070.00719.17
8.3.20.0040.00420.16
8.3.10.0080.00023.48
8.3.00.0080.00019.36
8.2.180.0080.00816.75
8.2.170.0110.01122.96
8.2.160.0110.00320.47
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0050.00322.21
8.2.110.0100.00020.51
8.2.100.0040.00817.85
8.2.90.0000.00918.34
8.2.80.0040.00417.97
8.2.70.0040.00417.75
8.2.60.0030.00517.93
8.2.50.0030.00618.07
8.2.40.0090.00020.07
8.2.30.0000.00918.21
8.2.20.0030.00617.83
8.2.10.0000.00718.21
8.2.00.0000.00717.79
8.1.280.0040.01125.92
8.1.270.0040.00424.02
8.1.260.0000.00726.35
8.1.250.0000.00728.09
8.1.240.0060.00322.14
8.1.230.0040.00820.83
8.1.220.0080.00017.77
8.1.210.0040.00418.99
8.1.200.0100.00017.35
8.1.190.0040.00417.23
8.1.180.0060.00318.10
8.1.170.0090.00018.59
8.1.160.0000.00722.05
8.1.150.0040.00418.96
8.1.140.0000.00717.49
8.1.130.0000.00717.92
8.1.120.0000.00717.49
8.1.110.0000.00717.39
8.1.100.0040.00417.38
8.1.90.0050.00217.50
8.1.80.0070.00017.42
8.1.70.0040.00417.37
8.1.60.0030.00617.64
8.1.50.0030.00617.61
8.1.40.0000.00817.43
8.1.30.0000.00817.73
8.1.20.0000.00817.69
8.1.10.0040.00417.65
8.1.00.0000.00817.47
8.0.300.0000.00820.16
8.0.290.0040.00416.75
8.0.280.0030.00518.56
8.0.270.0030.00317.21
8.0.260.0040.00417.22
8.0.250.0040.00417.06
8.0.240.0030.00317.09
8.0.230.0030.00716.92
8.0.220.0000.00816.98
8.0.210.0040.00417.01
8.0.200.0030.00617.04
8.0.190.0030.00617.04
8.0.180.0050.00316.89
8.0.170.0000.00716.89
8.0.160.0000.00717.04
8.0.150.0000.00816.93
8.0.140.0040.00416.88
8.0.130.0030.00313.48
8.0.120.0040.00416.96
8.0.110.0070.00016.82
8.0.100.0030.00516.86
8.0.90.0000.00717.10
8.0.80.0060.00916.98
8.0.70.0040.00417.04
8.0.60.0040.00416.88
8.0.50.0000.00716.95
8.0.30.0110.00817.15
8.0.20.0110.00817.40
8.0.10.0070.00017.22
8.0.00.0120.00516.96
7.4.330.0030.00315.02
7.4.320.0030.00316.57
7.4.300.0060.00016.64
7.4.290.0000.00716.51
7.4.280.0040.00416.51
7.4.270.0030.00316.57
7.4.260.0000.00716.49
7.4.250.0000.00716.43
7.4.240.0020.00516.51
7.4.230.0030.00316.77
7.4.220.0180.00016.60
7.4.210.0040.01116.69
7.4.200.0000.00716.55
7.4.160.0030.01716.55
7.4.150.0140.00617.40
7.4.140.0090.01317.86
7.4.130.0090.00816.67
7.4.120.0050.01216.72
7.4.110.0080.00916.57
7.4.100.0120.01216.60
7.4.90.0170.00416.67
7.4.80.0030.01419.39
7.4.70.0060.01116.50
7.4.60.0100.00716.65
7.4.50.0030.00616.83
7.4.40.0100.00616.71
7.4.30.0150.00716.69
7.4.00.0030.01415.11
7.3.330.0000.00613.34
7.3.320.0000.00513.48
7.3.310.0000.00716.37
7.3.300.0070.00016.46
7.3.290.0080.00716.47
7.3.280.0080.00816.45
7.3.270.0100.00717.40
7.3.260.0140.00416.54
7.3.250.0100.00816.43
7.3.240.0140.00316.49
7.3.230.0150.00316.44
7.3.210.0080.00816.42
7.3.200.0090.01219.39
7.3.190.0100.00716.45
7.3.180.0060.01016.56
7.3.170.0060.01016.47
7.3.160.0090.01016.52
7.2.330.0150.00316.77
7.2.320.0100.01416.66
7.2.310.0040.01316.52
7.2.300.0130.00316.80
7.2.290.0130.01016.89
7.2.60.0040.01216.71
7.2.00.0060.00619.55
7.1.200.0030.00915.92
7.1.100.0000.01118.21
7.1.70.0000.00917.09
7.1.60.0030.00719.11
7.1.50.0070.01317.03
7.1.00.0070.07022.57
7.0.200.0000.00816.97
7.0.140.0000.07322.04
7.0.60.0230.07719.94
7.0.50.0070.05017.88
7.0.40.0100.08320.11
7.0.30.0300.07720.22
7.0.20.0130.04320.19
7.0.10.0270.08020.26
7.0.00.0030.06320.30
5.6.280.0000.08021.04
5.6.210.0070.04720.67
5.6.200.0100.06318.16
5.6.190.0170.05020.61
5.6.180.0330.07720.48
5.6.170.0300.06320.47
5.6.160.0100.07320.56
5.6.150.0030.06718.25
5.6.140.0170.06718.21
5.6.130.0070.05318.17
5.6.120.0100.08320.98
5.6.110.0170.07021.12
5.6.100.0030.05021.12
5.6.90.0070.05321.08
5.6.80.0030.07020.38
5.6.70.4330.03720.40
5.5.350.0170.07320.41
5.5.340.0000.04018.08
5.5.330.0100.04720.43
5.5.320.0430.07720.32
5.5.310.0270.08020.32
5.5.300.0070.04017.92
5.5.290.0130.07317.98
5.5.280.0030.04020.83
5.5.270.0070.06720.73
5.5.260.0100.08020.76
5.5.250.0130.06720.46
5.5.240.0300.07320.28
5.4.450.0270.04319.27
5.4.440.0330.04019.42
5.4.430.0230.04019.30
5.4.420.0270.04719.54
5.4.410.0270.06719.25
5.4.400.0170.04019.18
5.4.390.0170.04019.16
5.4.380.0170.03718.95
5.4.370.0170.04319.15
5.4.360.0200.03318.99
5.4.350.0200.04019.08
5.4.340.0130.04319.15
5.4.320.0230.04019.15
5.4.310.0130.04019.20
5.4.300.0130.04019.06
5.4.290.0200.03719.05
5.4.280.0230.03019.05
5.4.270.0230.03019.08
5.4.260.0170.03718.86
5.4.250.0130.04318.84
5.4.240.0130.04018.94
5.4.230.0170.03719.13
5.4.220.0230.03319.19
5.4.210.0230.03318.97
5.4.200.0170.04019.12
5.4.190.0200.05318.93
5.4.180.0300.06319.08
5.4.170.0200.06019.14
5.4.160.0330.06719.06
5.4.150.0300.07019.29
5.4.140.0270.07016.35
5.4.130.0270.04016.49
5.4.120.0300.05716.33
5.4.110.0300.07016.28
5.4.100.0230.06016.27
5.4.90.0470.05716.37
5.4.80.0300.07016.25
5.4.70.0370.06016.54
5.4.60.0270.07016.36
5.4.50.0230.08316.43
5.4.40.0300.07316.48
5.4.30.0300.06716.48
5.4.20.0170.04716.55
5.4.10.0230.04716.24
5.4.00.0270.05716.01
5.3.290.0270.03314.84
5.3.280.0230.03014.84
5.3.270.0200.04014.84
5.3.260.0300.07014.84
5.3.250.0330.04714.84
5.3.240.0270.07714.84
5.3.230.0230.06014.84
5.3.220.0230.06314.84
5.3.210.0270.07314.84
5.3.200.0330.06314.84
5.3.190.0300.06314.84
5.3.180.0230.05014.84
5.3.170.0370.06314.84
5.3.160.0370.05314.84
5.3.150.0270.07314.84
5.3.140.0300.05714.84
5.3.130.0370.06314.84
5.3.120.0200.04314.84
5.3.110.0270.03714.84
5.3.100.0330.05714.84
5.3.90.0330.05314.84
5.3.80.0200.04314.84
5.3.70.0230.03714.84
5.3.60.0330.02714.84
5.3.50.0300.03014.84
5.3.40.0330.06314.84
5.3.30.0370.02714.84
5.3.20.0200.04314.84
5.3.10.0270.03714.84
5.3.00.0270.04014.84
5.2.170.0270.05714.84
5.2.160.0170.04714.84
5.2.150.0200.05014.84
5.2.140.0200.06014.84
5.2.130.0230.03014.84
5.2.120.0170.03314.84
5.2.110.0200.05314.84
5.2.100.0270.05314.84
5.2.90.0270.05014.84
5.2.80.0200.04714.84
5.2.70.0300.05714.84
5.2.60.0230.02714.84
5.2.50.0200.03314.84
5.2.40.0200.03014.84
5.2.30.0270.05714.84
5.2.20.0270.05014.84
5.2.10.0170.06014.84
5.2.00.0230.04014.84
5.1.60.0200.03714.84
5.1.50.0270.04714.84
5.1.40.0200.04714.84
5.1.30.0170.06014.84
5.1.20.0170.03014.84
5.1.10.0130.04314.84
5.1.00.0370.03014.84
5.0.50.0100.04714.84
5.0.40.0100.04014.84
5.0.30.0100.03714.84
5.0.20.0100.03014.84
5.0.10.0130.04314.84
5.0.00.0100.04014.84
4.4.90.0070.02014.84
4.4.80.0070.03714.84
4.4.70.0200.03014.84
4.4.60.0130.02314.84
4.4.50.0170.03014.84
4.4.40.0130.04314.84
4.4.30.0100.03314.84
4.4.20.0030.04014.84
4.4.10.0070.04014.84
4.4.00.0130.03314.84
4.3.110.0100.02014.84
4.3.100.0100.02714.84
4.3.90.0070.02014.84
4.3.80.0070.04714.84
4.3.70.0070.02714.84
4.3.60.0100.02014.84
4.3.50.0100.03714.84
4.3.40.0100.04714.84
4.3.30.0030.03714.84
4.3.20.0030.04014.84
4.3.10.0070.03714.84
4.3.00.0100.02714.84

preferences:
42.19 ms | 401 KiB | 5 Q