3v4l.org

run code in 300+ PHP versions simultaneously
<?php function is_valid($string) { while (($string = preg_replace('~(?:\(\)|\{}|\[])+~', '', $string, -1, $count)) && $count); return (int)!$string; } $expressions = array(")(){}", "[]({})", "([])", "{()[]}", "([)]", "{()[]}{()[]}{()[]}{()[]}{()[]}"); foreach ($expressions as $expression) { echo "$expression is " , is_valid($expression) , "\n"; }

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)
8.4.130.0120.00618.04
8.4.120.0100.01020.64
8.4.110.0130.00722.26
8.4.100.0060.00417.61
8.4.90.0110.01018.14
8.4.80.0070.00517.96
8.4.70.0090.00819.85
8.4.60.0120.00918.79
8.4.50.0140.00717.95
8.4.40.0100.01019.92
8.4.30.0030.00717.81
8.4.20.0100.01020.26
8.4.10.0070.01019.62
8.3.260.0110.00616.81
8.3.250.0100.00418.86
8.3.240.0110.00916.54
8.3.230.0110.00616.73
8.3.220.0100.01016.92
8.3.210.0130.00616.86
8.3.200.0050.00416.71
8.3.190.0070.01117.12
8.3.180.0050.00516.63
8.3.170.0050.00319.25
8.3.160.0180.00018.35
8.3.150.0130.00720.95
8.3.140.0060.01217.11
8.3.130.0000.00818.55
8.3.120.0110.00018.94
8.3.110.0130.00320.94
8.3.100.0030.00716.59
8.3.90.0090.00618.54
8.3.80.0060.00318.43
8.3.70.0070.01118.40
8.3.60.0110.00718.56
8.3.50.0160.00017.30
8.3.40.0110.01118.74
8.3.30.0190.00318.84
8.3.20.0090.00018.96
8.3.10.0000.00823.53
8.3.00.0040.00420.39
8.2.290.0130.00620.31
8.2.280.0040.00420.15
8.2.270.0150.00319.03
8.2.260.0070.00717.04
8.2.250.0000.00818.66
8.2.240.0130.00619.06
8.2.230.0090.00622.58
8.2.220.0030.01324.06
8.2.210.0030.00526.77
8.2.200.0060.00318.67
8.2.190.0140.00416.58
8.2.180.0120.01225.92
8.2.170.0070.01318.93
8.2.160.0120.00322.96
8.2.150.0000.00925.66
8.2.140.0040.00424.66
8.2.130.0040.00419.83
8.2.120.0000.00826.35
8.2.110.0160.00320.52
8.2.100.0040.00817.84
8.2.90.0060.00317.70
8.2.80.0000.00819.73
8.2.70.0000.00817.75
8.2.60.0000.00817.80
8.2.50.0000.00918.07
8.2.40.0000.00818.10
8.2.30.0080.00018.14
8.2.20.0040.00418.04
8.2.10.0000.00818.14
8.2.00.0000.00817.99
8.1.330.0100.00916.76
8.1.320.0090.01016.29
8.1.310.0080.00017.03
8.1.300.0080.00018.21
8.1.290.0030.00630.84
8.1.280.0170.00725.92
8.1.270.0060.00324.66
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0000.01123.92
8.1.230.0090.00322.68
8.1.220.0030.00617.74
8.1.210.0040.00418.97
8.1.200.0060.00317.25
8.1.190.0050.00317.47
8.1.180.0040.00418.10
8.1.170.0030.00518.96
8.1.160.0070.00018.95
8.1.150.0040.00418.88
8.1.140.0070.00022.07
8.1.130.0000.00720.17
8.1.120.0000.00717.61
8.1.110.0050.00317.53
8.1.100.0050.00317.61
8.1.90.0060.00317.50
8.1.80.0060.00317.49
8.1.70.0070.00017.59
8.1.60.0000.00817.61
8.1.50.0000.00817.55
8.1.40.0000.00917.58
8.1.30.0040.00417.78
8.1.20.0040.00417.69
8.1.10.0030.00617.68
8.1.00.0000.00917.68
8.0.300.0020.00519.98
8.0.290.0000.00916.88
8.0.280.0030.00318.46
8.0.270.0000.00717.27
8.0.260.0030.00318.48
8.0.250.0070.00017.09
8.0.240.0070.00017.00
8.0.230.0000.00716.95
8.0.220.0050.00216.96
8.0.210.0030.00316.99
8.0.200.0000.00717.13
8.0.190.0040.00417.11
8.0.180.0000.00817.09
8.0.170.0030.00617.05
8.0.160.0040.00417.14
8.0.150.0040.00416.85
8.0.140.0030.00317.04
8.0.130.0000.00513.45
8.0.120.0080.00016.97
8.0.110.0040.00416.89
8.0.100.0020.00517.02
8.0.90.0050.00316.95
8.0.80.0070.00917.05
8.0.70.0000.00717.02
8.0.60.0000.00816.93
8.0.50.0030.00616.92
8.0.30.0110.00617.05
8.0.20.0120.00817.40
8.0.10.0000.00716.98
8.0.00.0120.00916.75
7.4.330.0030.00315.55
7.4.320.0000.00616.67
7.4.300.0000.00616.81
7.4.290.0070.00016.82
7.4.280.0000.00716.55
7.4.270.0000.00716.71
7.4.260.0000.00716.74
7.4.250.0080.00016.68
7.4.240.0070.00016.80
7.4.230.0030.00316.46
7.4.220.0030.00616.79
7.4.210.0100.00816.78
7.4.200.0000.00716.65
7.4.160.0110.00716.71
7.4.140.0120.00717.86
7.4.130.0090.01116.78
7.4.120.0090.00916.76
7.4.110.0140.00516.75
7.4.100.0030.01716.62
7.4.90.0120.01016.66
7.4.80.0100.00719.39
7.4.70.0080.00816.59
7.4.60.0120.00616.64
7.4.50.0090.00916.77
7.4.40.0070.01016.79
7.4.10.0070.01114.88
7.4.00.0050.00915.09
7.3.330.0000.00513.52
7.3.320.0000.00513.43
7.3.310.0030.00616.52
7.3.300.0000.00716.38
7.3.290.0030.00316.38
7.3.280.0070.00816.46
7.3.260.0130.00516.69
7.3.240.0110.00716.71
7.3.230.0040.01516.75
7.3.210.0090.00916.80
7.3.200.0170.00016.51
7.3.190.0040.01816.67
7.3.180.0110.00716.77
7.3.170.0100.00916.70
7.3.160.0130.00716.52
7.3.130.0130.00614.82
7.3.120.0100.00714.71
7.3.110.0030.01715.27
7.3.100.0060.01015.16
7.3.90.0060.01014.87
7.3.80.0040.00715.04
7.3.70.0030.01415.06
7.3.60.0060.01014.96
7.3.50.0070.00714.98
7.3.40.0030.00915.08
7.3.30.0030.00614.89
7.3.20.0070.01116.75
7.3.10.0100.00716.79
7.3.00.0080.00816.85
7.2.330.0100.01616.72
7.2.320.0090.00916.81
7.2.310.0090.00616.89
7.2.300.0140.00716.90
7.2.290.0000.01716.92
7.2.260.0140.00015.08
7.2.250.0010.01715.03
7.2.240.0060.00915.20
7.2.230.0120.00315.02
7.2.220.0000.00915.31
7.2.210.0070.00715.30
7.2.200.0000.01015.34
7.2.190.0090.00614.89
7.2.180.0070.01014.97
7.2.170.0030.01215.36
7.2.160.0070.01015.15
7.2.150.0070.01116.94
7.2.140.0030.01016.99
7.2.130.0030.01317.17
7.2.120.0060.00916.86
7.2.110.0160.00915.89
7.2.100.0100.00715.99
7.2.90.0140.00516.19
7.2.80.0130.00716.12
7.2.70.0150.00516.06
7.2.60.0190.00416.26
7.2.50.0090.01016.23
7.2.40.0140.01016.22
7.2.30.0110.01016.30
7.2.20.0140.00816.03
7.2.10.0140.00916.14
7.2.00.0140.00316.08
7.1.330.0030.01016.08
7.1.320.0080.00815.96
7.1.310.0030.00915.97
7.1.300.0040.00815.88
7.1.290.0040.00815.98
7.1.280.0040.00816.00
7.1.270.0090.00615.71
7.1.260.0070.01016.20
7.1.250.0030.00716.14
7.1.240.0070.00716.07
7.1.230.0120.00915.15
7.1.220.0130.00515.07
7.1.210.0190.00615.09
7.1.200.0540.00415.16
7.1.190.0170.00315.02
7.1.180.0140.00615.02
7.1.170.0140.00515.03
7.1.160.0130.01115.01
7.1.150.0120.00714.99
7.1.140.0160.00515.02
7.1.130.0130.00714.89
7.1.120.0150.00515.12
7.1.110.0140.00715.04
7.1.100.0100.00515.25
7.1.90.0160.00215.08
7.1.80.0170.01015.00
7.1.70.0170.00815.06
7.1.60.0240.00323.97
7.1.50.0210.00824.10
7.1.40.0250.00824.06
7.1.30.0250.00724.05
7.1.20.0700.00724.17
7.1.10.0150.00615.06
7.1.00.0180.00414.99
7.0.330.0080.00415.40
7.0.320.0060.00915.50
7.0.310.0030.00915.64
7.0.300.0060.00615.57
7.0.290.0060.00615.41
7.0.280.0000.01215.52
7.0.270.0040.00715.63
7.0.260.0040.00915.77
7.0.250.0070.00715.84
7.0.240.0040.00415.64
7.0.230.0030.01015.53
7.0.220.0030.01015.74
7.0.210.0030.01015.53
7.0.200.0080.00415.81
7.0.190.0030.01015.24
7.0.180.0030.00615.88
7.0.170.0030.00915.59
7.0.160.0070.00715.64
7.0.150.0040.01115.73
7.0.140.0130.00015.76
7.0.130.0000.01215.45
7.0.120.0000.01215.41
7.0.110.0030.01015.54
7.0.100.0090.00615.63
7.0.90.0090.00315.59
7.0.80.0030.00915.40
7.0.70.0140.00015.53
7.0.60.0030.00715.73
7.0.50.0110.00015.68
7.0.40.0100.00613.62
7.0.30.0000.01413.47
7.0.20.0060.00613.71
7.0.10.0000.00813.48
7.0.00.0070.00713.44
5.6.400.0000.01114.63
5.6.390.0060.00614.20
5.6.380.0050.01114.47
5.6.370.0040.00714.32
5.6.360.0100.00314.73
5.6.350.0000.01213.88
5.6.340.0030.00614.30
5.6.330.0000.01414.59
5.6.320.0090.00614.61
5.6.310.0060.00614.51
5.6.300.0030.00614.57
5.6.290.0050.00314.29
5.6.280.0040.00714.46
5.6.270.0060.00614.33
5.6.260.0120.00314.34
5.6.250.0000.01714.36
5.6.240.0000.01714.49
5.6.230.0060.00914.39
5.6.220.0030.00914.67
5.6.210.0090.00314.63
5.6.200.0070.01414.29
5.6.190.0030.01014.28
5.6.180.0070.01014.60
5.6.170.0060.00614.65
5.6.160.0070.00414.27
5.6.150.0100.00614.32
5.6.140.0030.01014.48
5.6.130.0070.00714.39
5.6.120.0080.00614.41
5.6.110.0070.00414.66
5.6.100.0060.00614.39
5.6.90.0070.00714.04
5.6.80.0000.00914.23
5.6.70.0070.00414.34
5.6.60.0070.00414.41
5.6.50.0080.00814.46
5.6.40.0110.00314.59
5.6.30.0070.00314.20
5.6.20.0040.00414.38
5.6.10.0060.00914.55
5.6.00.0100.00614.22

preferences:
28.48 ms | 403 KiB | 5 Q