3v4l.org

run code in 300+ PHP versions simultaneously
<?php function checkCase($string) { // --- 列出标点的转换规则 $symMap = [ "." => ">", "," => "<" ]; foreach($symMap as $k => $v) $symMap[$v] = $k; // 列出标点的转换规则 --- // --- 列出各种可能情况 // $element = [["a", "A"], [".", ">"], ["b", "B"]] $element = str_split($string); foreach($element as &$item) { if(in_array($item, $symMap)) $item = [$item, $symMap[$item]]; else $item = [strtolower($item), strtoupper($item)]; } // 列出各种可能情况 --- // 记录当前的组合状态,每一项对应 $element 中的每一项 $flags = array_fill(0, count($element), 0); // 记录结果 $result = []; while(true) { $solution = ""; // 组合当前一条结果 foreach(range(0, count($element) - 1) as $i) $solution .= $element[$i][$flags[$i]]; // 改变当前状态,同时返回是否已经到达了末尾 $isEnding = function() use(&$flags, $element) { foreach(range(0, count($flags) - 1) as $i) { if($flags[$i] < count($element[$i]) - 1) { $flags[$i]++; if($i > 0) foreach(range(0, $i - 1) as $j) $flags[$j] = 0; return false; } } return true; }; if(!$isEnding()) $result[] = $solution; else break; } return $result; } var_dump(checkCase("A.B")); var_dump(checkCase("ABCD"));

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)
8.3.60.0070.01418.43
8.3.50.0120.00621.21
8.3.40.0110.00418.96
8.3.30.0070.00720.33
8.3.20.0040.00420.21
8.3.10.0080.00021.92
8.3.00.0080.00022.40
8.2.180.0090.01317.00
8.2.170.0090.00622.96
8.2.160.0030.01022.11
8.2.150.0060.00324.18
8.2.140.0000.00924.66
8.2.130.0080.00026.16
8.2.120.0090.00020.73
8.2.110.0100.00019.34
8.2.100.0090.00317.91
8.2.90.0000.00819.19
8.2.80.0000.00818.16
8.2.70.0080.00017.49
8.2.60.0000.00817.80
8.2.50.0030.00518.07
8.2.40.0080.00020.00
8.2.30.0060.00319.44
8.2.20.0050.00217.75
8.2.10.0000.00917.88
8.2.00.0000.00817.77
8.1.280.0040.01425.92
8.1.270.0050.00323.99
8.1.260.0030.00526.35
8.1.250.0050.00328.09
8.1.240.0030.00623.77
8.1.230.0040.00820.98
8.1.220.0000.00918.77
8.1.210.0060.00321.00
8.1.200.0130.00017.23
8.1.190.0040.00417.55
8.1.180.0040.00418.10
8.1.170.0040.00418.63
8.1.160.0040.00418.87
8.1.150.0040.00418.71
8.1.140.0000.00717.41
8.1.130.0000.00717.84
8.1.120.0030.00517.52
8.1.110.0000.00717.42
8.1.100.0000.00817.54
8.1.90.0040.00417.48
8.1.80.0000.00817.59
8.1.70.0000.00717.47
8.1.60.0000.00817.64
8.1.50.0000.00817.46
8.1.40.0000.00917.59
8.1.30.0030.00617.70
8.1.20.0050.00317.77
8.1.10.0040.00417.66
8.1.00.0040.00417.61
8.0.300.0080.00320.15
8.0.290.0040.00417.41
8.0.280.0070.00018.36
8.0.270.0040.00417.31
8.0.260.0040.00417.02
8.0.250.0030.00317.01
8.0.240.0000.01117.10
8.0.230.0000.00717.13
8.0.220.0040.00416.90
8.0.210.0000.00717.00
8.0.200.0030.00317.08
8.0.190.0030.00617.06
8.0.180.0000.00717.07
8.0.170.0080.00016.95
8.0.160.0030.00317.11
8.0.150.0040.00417.00
8.0.140.0040.00416.95
8.0.130.0000.00713.43
8.0.120.0030.00617.01
8.0.110.0050.00216.91
8.0.100.0040.00416.79
8.0.90.0030.00516.93
8.0.80.0060.00917.05
8.0.70.0050.00317.00
8.0.60.0040.00416.96
8.0.50.0000.00816.89
8.0.30.0110.01117.05
8.0.20.0100.00817.40
8.0.10.0040.00417.09
8.0.00.0110.01016.65
7.4.330.0050.00015.00
7.4.320.0030.00316.62
7.4.300.0030.00316.61
7.4.290.0070.00016.55
7.4.280.0000.00716.66
7.4.270.0040.00416.64
7.4.260.0000.00513.32
7.4.250.0000.00716.54
7.4.240.0000.00816.56
7.4.230.0030.00516.77
7.4.220.0070.01116.64
7.4.210.0070.00716.56
7.4.200.0000.00716.56
7.4.190.0040.00416.44
7.4.160.0090.01516.53
7.4.150.0060.01317.40
7.4.140.0170.00417.86
7.4.130.0130.01016.55
7.4.120.0140.00616.54
7.4.110.0030.01716.57
7.4.100.0090.00916.81
7.4.90.0100.00916.43
7.4.80.0090.00919.39
7.4.70.0060.01216.48
7.4.60.0130.00316.54
7.4.50.0000.00816.47
7.4.40.0070.01322.77
7.4.30.0070.01216.67
7.4.00.0120.00614.95
7.3.330.0060.00013.53
7.3.320.0000.00513.42
7.3.310.0040.00416.39
7.3.300.0000.00716.32
7.3.290.0120.00916.53
7.3.280.0080.00716.46
7.3.270.0070.01117.40
7.3.260.0090.00816.44
7.3.250.0120.01216.56
7.3.240.0130.00716.44
7.3.230.0100.01316.63
7.3.210.0030.01516.54
7.3.200.0190.00419.39
7.3.190.0190.01616.21
7.3.180.0110.00716.65
7.3.170.0040.01116.48
7.3.160.0130.00816.37
7.3.120.0110.00715.10
7.3.110.0060.01314.96
7.3.100.0040.00714.76
7.3.90.0070.01015.00
7.3.80.0110.00415.02
7.3.70.0070.00714.75
7.3.60.0000.01215.06
7.3.50.0060.00614.84
7.3.40.0000.00914.68
7.3.30.0030.01215.01
7.3.20.0100.00316.80
7.3.10.0000.01116.66
7.3.00.0060.00916.86
7.2.330.0100.00716.62
7.2.320.0080.01216.82
7.2.310.0060.01816.44
7.2.300.0030.01416.63
7.2.290.0120.00616.58
7.2.240.0090.00314.95
7.2.230.0000.01415.05
7.2.220.0110.00715.35
7.2.210.0000.01914.79
7.2.200.0030.00514.89
7.2.190.0070.01114.95
7.2.180.0080.00014.82
7.2.170.0060.00615.21
7.2.160.0040.01215.23
7.2.150.0030.00717.08
7.2.140.0030.01016.98
7.2.130.0100.00316.93
7.2.120.0040.00417.02
7.2.110.0030.01216.99
7.2.100.0000.01517.11
7.2.90.0040.00816.85
7.2.80.0080.00717.03
7.2.70.0090.00617.21
7.2.60.0110.00417.03
7.2.50.0070.01016.96
7.2.40.0030.00916.99
7.2.30.0130.00316.63
7.2.20.0100.00717.07
7.2.10.0040.00816.83
7.2.00.0060.00818.03
7.1.330.0030.01215.96
7.1.320.0050.00315.62
7.1.310.0110.00715.87
7.1.300.0040.01115.77
7.1.290.0060.00316.01
7.1.280.0060.00315.89
7.1.270.0060.00615.74
7.1.260.0030.01015.89
7.1.250.0030.01015.93
7.1.200.0040.00415.59
7.1.100.0040.00418.14
7.1.70.0030.00617.26
7.1.60.0120.01219.32
7.1.50.0130.01017.02
7.1.00.0030.05722.36
7.0.200.0030.00516.65
7.0.140.0000.07322.15
7.0.100.0230.06719.96
7.0.90.0070.08020.16
7.0.80.0000.05719.93
7.0.70.0130.04319.93
7.0.60.0170.06020.05
7.0.50.0100.03720.19
7.0.40.0000.04320.02
7.0.30.0030.04019.95
7.0.20.0000.05020.10
7.0.10.0100.03720.08
7.0.00.0030.04320.12
5.6.280.0030.07720.91
5.6.250.0200.07720.50
5.6.240.0030.09020.71
5.6.230.0070.06020.73
5.6.220.0100.06020.71
5.6.210.0070.05320.67
5.6.200.0100.03021.12
5.6.190.0000.04021.11
5.6.180.0030.04320.96
5.6.170.0100.04321.06
5.6.160.0000.05021.05
5.6.150.0000.04720.96
5.6.140.0030.06321.11
5.6.130.0030.04021.03
5.6.120.0100.03320.96
5.6.110.0070.04021.02
5.6.100.0000.04721.01
5.6.90.0070.04021.00
5.6.80.0030.04020.41
5.6.70.0000.04320.40
5.6.60.0030.03720.42
5.6.50.0100.03020.42
5.6.40.0070.08320.32
5.6.30.0030.04020.48
5.6.20.0100.04020.39
5.6.10.0030.04020.32
5.6.00.0070.05720.39
5.5.380.0100.08320.50
5.5.370.0170.05320.51
5.5.360.0130.07720.40
5.5.350.0100.03720.47
5.5.340.0030.04720.94
5.5.330.0030.04020.93
5.5.320.0130.02720.79
5.5.310.0070.04320.79
5.5.300.0070.06720.80
5.5.290.0130.03320.79
5.5.280.0000.04720.84
5.5.270.0030.04320.89
5.5.260.0100.03720.94
5.5.250.0070.03720.56
5.5.240.0030.03320.17
5.5.230.0030.03320.31
5.5.220.0070.03020.25
5.5.210.0030.04020.30
5.5.200.0070.03720.25
5.5.190.0070.03720.22
5.5.180.0030.04020.25
5.5.160.0000.06020.29
5.5.150.0070.06720.27
5.5.140.0130.07020.16
5.5.130.0100.07020.25
5.5.120.0070.05020.18
5.5.110.0070.07720.21
5.5.100.0030.04719.97
5.5.90.0070.07020.08
5.5.80.0070.07019.99
5.5.70.0070.07320.07
5.5.60.0030.05020.07
5.5.50.0130.06020.11
5.5.40.0070.07720.05
5.5.30.0100.07720.09
5.5.20.0030.08720.16
5.5.10.0070.08020.10
5.5.00.0170.06720.11
5.4.450.0000.04719.46
5.4.440.0000.04719.36
5.4.430.0030.04019.37
5.4.420.0070.03719.45
5.4.410.0070.04019.14
5.4.400.0070.03319.05
5.4.390.0070.03719.12
5.4.380.0030.04319.03
5.4.370.0030.03319.18
5.4.360.0130.03019.03
5.4.350.0070.05019.12
5.4.340.0000.04019.03
5.4.320.0000.05719.20
5.4.310.0030.03719.03
5.4.300.0000.05318.90
5.4.290.0070.03019.14
5.4.280.0070.03319.09
5.4.270.0070.07019.13
5.4.260.0030.04319.20
5.4.250.0100.04019.04
5.4.240.0170.06719.11
5.4.230.0100.04019.17
5.4.220.0070.07018.94
5.4.210.0030.08318.87
5.4.200.0070.06719.13
5.4.190.0170.07018.89
5.4.180.0070.05718.99
5.4.170.0070.08018.89
5.4.160.0030.08319.14
5.4.150.0130.07718.88
5.4.140.0100.07016.48
5.4.130.0030.07016.48
5.4.120.0070.06016.46
5.4.110.0030.08016.56
5.4.100.0070.04016.42
5.4.90.0100.07316.56
5.4.80.0070.07316.38
5.4.70.0100.06016.55
5.4.60.0100.07316.48
5.4.50.0100.07016.47
5.4.40.0000.04716.54
5.4.30.0100.06316.45
5.4.20.0070.07016.33
5.4.10.0000.05316.47
5.4.00.0170.04715.86
5.3.290.0070.03314.75
5.3.280.0200.06314.56
5.3.270.0000.07014.60
5.3.260.0070.06014.50
5.3.250.0100.05714.67
5.3.240.0100.07014.61
5.3.230.0100.07714.74
5.3.220.0070.07314.55
5.3.210.0030.07314.62
5.3.200.0100.07714.59
5.3.190.0100.06314.63
5.3.180.0130.07014.60
5.3.170.0070.05714.59
5.3.160.0070.07314.66
5.3.150.0030.08314.59
5.3.140.0100.07314.48
5.3.130.0070.07014.62
5.3.120.0100.07014.48
5.3.110.0030.06314.67
5.3.100.0100.07014.10
5.3.90.0070.07314.08
5.3.80.0070.04714.11
5.3.70.0170.04714.07
5.3.60.0130.07014.12
5.3.50.0000.08013.83
5.3.40.0100.07314.01
5.3.30.0100.06714.00
5.3.20.0070.06713.68
5.3.10.0070.05013.71
5.3.00.0270.04713.63
5.2.170.0030.07012.28
5.2.160.0030.06312.28
5.2.150.0070.06012.28
5.2.140.0030.06012.28
5.2.130.0000.03712.28
5.2.120.0030.06312.28
5.2.110.0070.05712.28
5.2.100.0000.05712.28
5.2.90.0070.05312.28
5.2.80.0030.06312.28
5.2.70.0070.03012.28
5.2.60.0070.04712.28
5.2.50.0000.03712.28
5.2.40.0030.04012.28
5.2.30.0030.05712.28
5.2.20.0030.03312.28
5.2.10.0030.06312.28
5.2.00.0070.04012.28
5.1.60.0070.05012.28
5.1.50.0070.05312.28
5.1.40.0000.05712.28
5.1.30.0070.05312.28
5.1.20.0030.04012.28
5.1.10.0070.04712.28
5.1.00.0030.05012.28
5.0.50.0030.05012.28
5.0.40.0030.04012.28
5.0.30.0070.06012.28
5.0.20.0070.02712.28
5.0.10.0000.04712.28
5.0.00.0030.06312.28
4.4.90.0070.03012.28
4.4.80.0000.03712.28
4.4.70.0000.04012.28
4.4.60.0030.02712.28
4.4.50.0030.03312.28
4.4.40.0030.05312.28
4.4.30.0000.03712.28
4.4.20.0030.03312.28
4.4.10.0030.03712.28
4.4.00.0030.06012.28
4.3.110.0000.04012.28
4.3.100.0000.03712.28
4.3.90.0070.03012.28
4.3.80.0030.05312.28
4.3.70.0030.03312.28
4.3.60.0030.02712.28
4.3.50.0070.03012.28
4.3.40.0030.05012.28
4.3.30.0070.03312.28
4.3.20.0000.03712.28
4.3.10.0030.02712.28
4.3.00.0030.02712.28

preferences:
48.26 ms | 401 KiB | 5 Q