3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isCorrect($string) { for(var $i = 0; $i < strlen($string); $i++) { $string; } } $string = '({{}})'; var_dump(substr($string, 0, 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)
5.4.340.0050.03612.03
5.4.320.0050.03812.52
5.4.310.0050.04212.52
5.4.300.0080.03712.52
5.4.290.0060.04012.51
5.4.280.0120.04112.41
5.4.270.0050.03812.41
5.4.260.0060.04212.41
5.4.250.0070.03612.41
5.4.240.0080.03712.41
5.4.230.0120.03312.40
5.4.220.0050.03812.40
5.4.210.0080.03312.40
5.4.200.0040.03812.40
5.4.190.0060.03612.40
5.4.180.0060.04012.39
5.4.170.0040.03812.41
5.4.160.0070.03712.40
5.4.150.0090.03512.39
5.4.140.0070.04212.09
5.4.130.0080.03812.07
5.4.120.0070.04112.04
5.4.110.0080.03712.03
5.4.100.0070.03412.03
5.4.90.0040.04712.03
5.4.80.0060.04012.03
5.4.70.0060.03512.02
5.4.60.0050.03712.03
5.4.50.0080.03312.02
5.4.40.0070.03412.02
5.4.30.0070.04112.01
5.4.20.0060.04112.00
5.4.10.0060.03412.01
5.4.00.0030.03911.51
5.3.290.0070.04012.80
5.3.280.0060.04212.70
5.3.270.0070.03812.72
5.3.260.0070.03812.72
5.3.250.0060.03812.72
5.3.240.0030.04112.72
5.3.230.0100.03712.71
5.3.220.0060.04212.68
5.3.210.0080.03912.68
5.3.200.0080.03512.68
5.3.190.0070.03712.67
5.3.180.0070.03512.67
5.3.170.0060.03812.67
5.3.160.0070.04012.67
5.3.150.0080.03712.67
5.3.140.0090.03412.66
5.3.130.0060.03912.65
5.3.120.0060.03812.66
5.3.110.0090.03912.66
5.3.100.0070.03812.13
5.3.90.0080.03612.11
5.3.80.0100.03812.09
5.3.70.0090.03812.09
5.3.60.0090.03312.08
5.3.50.0040.04512.02
5.3.40.0080.03512.02
5.3.30.0110.03711.98
5.3.20.0090.03711.76
5.3.10.0070.03311.73
5.3.00.0090.03911.71
5.2.170.0060.0339.22
5.2.160.0040.0319.21
5.2.150.0040.0319.21
5.2.140.0040.0329.21
5.2.130.0060.0279.17
5.2.120.0080.0319.18
5.2.110.0060.0289.18
5.2.100.0040.0289.18
5.2.90.0050.0329.18
5.2.80.0060.0309.18
5.2.70.0030.0389.17
5.2.60.0040.0419.13
5.2.50.0040.0319.09
5.2.40.0030.0309.06
5.2.30.0050.0379.05
5.2.20.0060.0289.04
5.2.10.0030.0298.95
5.2.00.0080.0358.81
5.1.60.0020.0268.08
5.1.50.0060.0268.08
5.1.40.0060.0228.06
5.1.30.0040.0268.42
5.1.20.0100.0288.44
5.1.10.0030.0328.16
5.1.00.0050.0268.16
5.0.50.0060.0186.64
5.0.40.0040.0186.50
5.0.30.0030.0316.31
5.0.20.0040.0186.28
5.0.10.0070.0166.25
5.0.00.0050.0346.25
4.4.90.0030.0194.78
4.4.80.0030.0164.76
4.4.70.0040.0154.75
4.4.60.0050.0134.75
4.4.50.0040.0174.77
4.4.40.0030.0254.71
4.4.30.0050.0144.76
4.4.20.0030.0154.84
4.4.10.0030.0154.85
4.4.00.0030.0244.76
4.3.110.0030.0154.67
4.3.100.0040.0174.66
4.3.90.0020.0164.63
4.3.80.0030.0244.58
4.3.70.0030.0144.63
4.3.60.0030.0144.62
4.3.50.0010.0184.63
4.3.40.0030.0234.54
4.3.30.0030.0173.30
4.3.20.0010.0183.29
4.3.10.0040.0133.24
4.3.00.0000.0236.63

preferences:
142.86 ms | 1394 KiB | 7 Q