3v4l.org

run code in 300+ PHP versions simultaneously
<?php function getFormattedString($str) { return implode('', explode(' ', mb_strtolower($str, 'UTF-8'))); } function getOddLengthPalindromeArray($str) { $result = []; $l = 0; $r = -1; for ($i = 0, $n = mb_strlen($str, 'UTF-8'); $i < $n; $i++) { $k = ($i > $r ? 1 : min($result[$l + $r - $i], $r - $i)); echo $str[$i - $k]; while ($i - $k >= 0 && $i + $k < $n && $str[$i - $k] == $str[$i + $k]) { $k++; } $result[$i] = $k; if ($i + $k - 1 > $r) { $l = $i - $k + 1; $r = $i + $k - 1; } } return $result; } function getEvenLengthPalindromeArray($str) { $result = []; $l = 0; $r = -1; for ($i = 0, $n = mb_strlen($str, 'UTF-8'); $i < $n; $i++) { $k = ($i > $r ? 0 : min($result[$l + $r - $i - 1], $r - $i)); while ($i - $k >= 0 && $i + $k + 1 < $n && $str[$i - $k] == $str[$i + $k + 1]) { $k++; } $result[$i] = $k; if ($i + $k > $r) { $l = $i - $k + 1; $r = $i + $k; } } return $result; } $formattedString = getFormattedString("Аргентина манит негра"); $oddPalindromeArray = getOddLengthPalindromeArray($formattedString); $evenPalindromeArray = getEvenLengthPalindromeArray($formattedString); $maxOddValue = max($oddPalindromeArray); $maxEvenValue = max($evenPalindromeArray); $maxOddPalindromeLength = $maxOddValue * 2 - 1; $maxEvenPalindromeLength = $maxEvenValue * 2; if ($maxOddPalindromeLength > $maxEvenPalindromeLength && $maxOddValue !== 1) { $maxOddKey = array_search($maxOddValue, $oddPalindromeArray); var_dump($oddPalindromeArray); //var_dump(mb_substr($formattedString, $maxOddKey - $maxOddValue + 1, $maxOddPalindromeLength, 'UTF-8')); } elseif ($maxOddValue * 2 - 1 < $maxEvenValue * 2 && $maxEvenValue !== 0) { $maxEvenKey = array_search($maxEvenValue, $evenPalindromeArray); var_dump(mb_substr($formattedString, $maxEvenKey - $maxEvenValue, $maxEvenPalindromeLength, 'UTF-8')); } else { var_dump($formattedString[0]); }

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)
8.3.60.0130.00616.75
8.3.50.0120.00721.85
8.3.40.0110.01118.67
8.3.30.0110.00418.85
8.3.20.0000.00720.18
8.3.10.0050.00223.48
8.3.00.0040.00419.79
8.2.180.0080.00818.29
8.2.170.0140.00722.96
8.2.160.0030.01020.55
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0040.00421.04
8.2.120.0050.00326.35
8.2.110.0090.00020.51
8.2.100.0100.00317.78
8.2.90.0090.00017.75
8.2.80.0040.00418.91
8.2.70.0030.00617.75
8.2.60.0000.00817.93
8.2.50.0000.01118.07
8.2.40.0000.00918.22
8.2.30.0030.00518.14
8.2.20.0000.00817.64
8.2.10.0070.00018.19
8.2.00.0040.00418.15
8.1.280.0060.01325.92
8.1.270.0030.00619.00
8.1.260.0080.00028.09
8.1.250.0040.00428.09
8.1.240.0030.00719.01
8.1.230.0090.00317.83
8.1.220.0050.00317.76
8.1.210.0030.00618.77
8.1.200.0030.00717.47
8.1.190.0050.00317.35
8.1.180.0040.00418.10
8.1.170.0000.00818.72
8.1.160.0000.00719.07
8.1.150.0000.00818.93
8.1.140.0000.00819.57
8.1.130.0040.00417.84
8.1.120.0000.00717.52
8.1.110.0030.00617.48
8.1.100.0000.00817.54
8.1.90.0050.00217.57
8.1.80.0040.00417.39
8.1.70.0000.00717.45
8.1.60.0050.00317.68
8.1.50.0060.00317.63
8.1.40.0040.00417.54
8.1.30.0000.00917.70
8.1.20.0040.00417.70
8.1.10.0050.00317.66
8.1.00.0080.00017.44
8.0.300.0090.00318.77
8.0.290.0050.00316.88
8.0.280.0050.00218.50
8.0.270.0030.00517.18
8.0.260.0060.00017.30
8.0.250.0000.00716.99
8.0.240.0080.00017.01
8.0.230.0050.00217.02
8.0.220.0000.00717.07
8.0.210.0050.00217.02
8.0.200.0030.00316.91
8.0.190.0000.00816.92
8.0.180.0050.00217.06
8.0.170.0040.00416.92
8.0.160.0000.00716.94
8.0.150.0080.00016.90
8.0.140.0000.00716.96
8.0.130.0000.00613.45
8.0.120.0050.00316.86
8.0.110.0030.00516.79
8.0.100.0000.00816.81
8.0.90.0000.00716.88
8.0.80.0040.01116.94
8.0.70.0040.00416.95
8.0.60.0040.00416.91
8.0.50.0000.00817.03
8.0.30.0060.01217.21
8.0.20.0110.01117.40
8.0.10.0040.00416.90
8.0.00.0100.01116.82
7.4.330.0000.00516.71
7.4.320.0000.00716.47
7.4.300.0030.00316.47
7.4.290.0050.00316.52
7.4.280.0030.00516.63
7.4.270.0000.00716.59
7.4.260.0030.00316.56
7.4.250.0020.00516.55
7.4.240.0040.00316.67
7.4.230.0030.00316.46
7.4.220.0080.01116.70
7.4.210.0070.00716.70
7.4.200.0070.00016.69
7.4.160.0120.01216.66
7.4.150.0110.00817.40
7.4.140.0110.00917.86
7.4.130.0140.01016.56
7.4.120.0150.00416.57
7.4.110.0140.00416.68
7.4.100.0130.00516.55
7.4.90.0140.01116.66
7.4.80.0100.01019.39
7.4.70.0060.01116.71
7.4.60.0100.00716.70
7.4.50.0090.00716.72
7.4.40.0070.01016.39
7.4.30.0120.00616.68
7.4.10.0030.01715.16
7.4.00.0080.00915.07
7.3.330.0030.00313.38
7.3.320.0000.00513.38
7.3.310.0000.00716.47
7.3.300.0000.00716.56
7.3.290.0130.00616.48
7.3.280.0100.00616.54
7.3.270.0030.01617.40
7.3.260.0040.01416.37
7.3.240.0150.00716.39
7.3.230.0110.00616.68
7.3.210.0090.00916.68
7.3.200.0150.00816.62
7.3.190.0150.00816.75
7.3.180.0130.00916.36
7.3.170.0040.01416.68
7.3.160.0030.01216.57
7.3.130.0120.00615.20
7.3.120.0070.01015.02
7.3.110.0080.00814.96
7.3.100.0060.01014.91
7.3.90.0030.01314.90
7.3.80.0040.00614.99
7.3.70.0120.00314.86
7.3.60.0030.01114.96
7.3.50.0070.00514.89
7.3.40.0010.01214.79
7.3.30.0060.00414.84
7.3.20.0030.01316.69
7.3.10.0050.00816.62
7.3.00.0070.00816.80
7.2.330.0110.01116.76
7.2.320.0210.00016.59
7.2.310.0090.01516.72
7.2.300.0140.00516.50
7.2.290.0060.01416.56
7.2.260.0070.01114.90
7.2.250.0130.00515.05
7.2.240.0100.00714.90
7.2.230.0040.01315.03
7.2.220.0060.00715.19
7.2.210.0050.00815.27
7.2.200.0080.00615.11
7.2.190.0040.01115.02
7.2.180.0050.01014.84
7.2.170.0070.01015.19
7.2.160.0100.00715.11
7.2.150.0100.00016.85
7.2.140.0100.00716.98
7.2.130.0040.01016.96
7.2.120.0120.00317.06
7.2.110.0050.00717.08
7.2.100.0050.00716.76
7.2.90.0110.00316.94
7.2.80.0060.00617.21
7.2.70.0060.00717.04
7.2.60.0080.00716.93
7.2.50.0080.00616.96
7.2.40.0060.00817.13
7.2.30.0020.01016.91
7.2.20.0020.01016.93
7.2.10.0060.00716.75
7.2.00.0030.00917.78
7.1.330.0070.00715.92
7.1.320.0020.00915.86
7.1.310.0060.00616.14
7.1.300.0020.01215.97
7.1.290.0070.00915.87
7.1.280.0020.01015.81
7.1.270.0050.00615.72
7.1.260.0090.00715.90
7.1.250.0110.00515.86
7.1.240.0130.00015.63
7.1.230.0080.00415.85
7.1.220.0090.00915.61
7.1.210.0060.00915.79
7.1.200.0080.00515.71
7.1.190.0100.00015.86
7.1.180.0030.00815.95
7.1.170.0030.01215.94
7.1.160.0080.00616.05
7.1.150.0050.00515.84
7.1.140.0030.01215.84
7.1.130.0000.01115.90
7.1.120.0080.00015.87
7.1.110.0030.01015.86
7.1.100.0000.01016.96
7.1.90.0070.00715.68
7.1.80.0080.00815.91
7.1.70.0050.00916.65
7.1.60.0090.01317.71
7.1.50.0090.00716.46
7.1.40.0040.01115.64
7.1.30.0070.00715.68
7.1.20.0110.00415.88
7.1.10.0030.01015.73
7.1.00.0080.04019.09
7.0.330.0090.00015.36
7.0.320.0040.00915.44
7.0.310.0030.01015.19
7.0.300.0040.00815.24
7.0.290.0040.00715.33
7.0.280.0070.00315.48
7.0.270.0030.01415.57
7.0.260.0030.01015.32
7.0.250.0110.00415.56
7.0.240.0080.00015.51
7.0.230.0000.01315.48
7.0.220.0000.01315.64
7.0.210.0060.01315.08
7.0.200.0020.00716.20
7.0.190.0000.01215.18
7.0.180.0030.00915.51
7.0.170.0120.00315.37
7.0.160.0040.00415.21
7.0.150.0090.00615.55
7.0.140.0030.01015.62
7.0.130.0070.00715.50
7.0.120.0090.00615.35
7.0.110.0000.01015.35
7.0.100.0290.04217.68
7.0.90.0290.02717.76
7.0.80.0310.04017.68
7.0.70.0330.03817.69
7.0.60.0320.03817.82
7.0.50.0250.04117.94
7.0.40.0050.04716.87
7.0.30.0050.02516.80
7.0.20.0120.03716.72
7.0.10.0050.04416.86
7.0.00.0070.04216.71
5.6.400.0060.00914.80
5.6.390.0090.00314.46
5.6.380.0040.01114.36
5.6.370.0100.00614.54
5.6.360.0030.01014.61
5.6.350.0040.01114.33
5.6.340.0000.00914.12
5.6.330.0000.00914.40
5.6.320.0110.00014.68
5.6.310.0000.01014.52
5.6.300.0060.00314.26
5.6.290.0100.00314.71
5.6.280.0020.03217.84
5.6.270.0040.01114.34
5.6.260.0120.00314.74
5.6.250.0050.04517.48
5.6.240.0120.03517.51
5.6.230.0070.04217.52
5.6.220.0100.04317.46
5.6.210.0110.03617.57
5.6.200.0080.04417.75
5.6.190.0050.03817.78
5.6.180.0040.03117.76
5.6.170.0030.04217.72
5.6.160.0080.04717.68
5.6.150.0140.04017.58
5.6.140.0090.04517.81
5.6.130.0070.02517.68
5.6.120.0030.02917.69
5.6.110.0070.04517.67
5.6.100.0080.04517.57
5.6.90.0020.03017.78
5.6.80.0110.01817.35
5.6.70.0120.02717.39
5.6.60.0050.02517.33
5.6.50.0090.03117.35
5.6.40.0080.02017.33
5.6.30.0070.04417.46
5.6.20.0070.02017.48
5.6.10.0000.02717.39
5.6.00.0090.02217.21
5.5.380.0060.02617.45
5.5.370.0020.04617.56
5.5.360.0030.02817.38
5.5.350.0090.03917.51
5.5.340.0030.04917.55
5.5.330.0080.02517.65
5.5.320.0060.04317.53
5.5.310.0100.04517.54
5.5.300.0070.04217.57
5.5.290.0060.04317.53
5.5.280.0050.03317.70
5.5.270.0070.02617.67
5.5.260.0050.04517.68
5.5.250.0050.02617.45
5.5.240.0050.02317.19
5.5.230.0000.02917.19
5.5.220.0100.01817.17
5.5.210.0070.02317.33
5.5.200.0100.02117.33
5.5.190.0050.02317.17
5.5.180.0030.02717.05
5.5.170.0030.01314.32
5.5.160.0080.02117.37
5.5.150.0100.03917.17
5.5.140.0070.02017.25
5.5.130.0090.03617.37
5.5.120.0070.02317.37
5.5.110.0060.02217.27
5.5.100.0050.02617.29
5.5.90.0020.02717.12
5.5.80.0060.02417.29
5.5.70.0120.03417.24
5.5.60.0090.02817.16
5.5.50.0060.03317.22
5.5.40.0070.02217.36
5.5.30.0110.02117.18
5.5.20.0060.02417.34
5.5.10.0080.03117.10
5.5.00.0120.04217.13

preferences:
50.36 ms | 401 KiB | 5 Q