3v4l.org

run code in 300+ PHP versions simultaneously
<?php function split_preg($str) { return preg_split('//u', $str, -1); } function getFormattedString($str) { return implode('', explode(' ', mb_strtolower($str, 'UTF-8'))); } function getOddLengthPalindromeArray($str) { $result = []; $l = 0; $r = -1; var_dump(split_preg($str)); 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)
8.3.60.0120.00318.81
8.3.50.0090.01222.17
8.3.40.0150.00618.79
8.3.30.0150.00018.83
8.3.20.0040.00420.16
8.3.10.0040.00423.59
8.3.00.0000.00819.91
8.2.180.0130.00716.50
8.2.170.0120.00922.96
8.2.160.0110.00420.39
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0030.00621.18
8.2.120.0040.00426.35
8.2.110.0070.00420.38
8.2.100.0090.00317.97
8.2.90.0050.00319.17
8.2.80.0000.00817.97
8.2.70.0000.00817.88
8.2.60.0070.00417.80
8.2.50.0080.00018.07
8.2.40.0090.00019.41
8.2.30.0000.00720.66
8.2.20.0000.00817.93
8.2.10.0040.00418.25
8.2.00.0080.00018.03
8.1.280.0070.00725.92
8.1.270.0030.00519.03
8.1.260.0000.00828.09
8.1.250.0040.00428.09
8.1.240.0090.00323.66
8.1.230.0080.00422.55
8.1.220.0030.00517.74
8.1.210.0030.00618.77
8.1.200.0030.00717.47
8.1.190.0080.00017.71
8.1.180.0040.00418.10
8.1.170.0040.00418.96
8.1.160.0000.00720.86
8.1.150.0000.00818.93
8.1.140.0040.00419.72
8.1.130.0050.00217.82
8.1.120.0030.00617.70
8.1.110.0040.00417.69
8.1.100.0000.00717.70
8.1.90.0030.00517.70
8.1.80.0050.00317.68
8.1.70.0070.00017.55
8.1.60.0040.00417.69
8.1.50.0050.00317.65
8.1.40.0080.00017.63
8.1.30.0060.00317.82
8.1.20.0000.00917.79
8.1.10.0000.00917.84
8.1.00.0090.00017.64
8.0.300.0000.00818.77
8.0.290.0000.00816.88
8.0.280.0040.00418.55
8.0.270.0040.00417.34
8.0.260.0030.00317.31
8.0.250.0030.00317.30
8.0.240.0070.00017.25
8.0.230.0070.00017.11
8.0.220.0040.00417.12
8.0.210.0040.00317.25
8.0.200.0020.00517.25
8.0.190.0030.00517.13
8.0.180.0000.00717.23
8.0.170.0040.00417.10
8.0.160.0080.00017.22
8.0.150.0000.00917.02
8.0.140.0040.00417.04
8.0.130.0090.00013.64
8.0.120.0000.00817.15
8.0.110.0050.00317.06
8.0.100.0050.00217.04
8.0.90.0040.00416.98
8.0.80.0050.01017.09
8.0.70.0050.00217.05
8.0.60.0000.00717.04
8.0.50.0040.00417.13
8.0.30.0120.01117.53
8.0.20.0130.00917.40
8.0.10.0000.00717.28
8.0.00.0090.01316.89
7.4.330.0000.00516.74
7.4.320.0030.00316.71
7.4.300.0030.00316.80
7.4.290.0030.00516.73
7.4.280.0000.00716.91
7.4.270.0000.00716.94
7.4.260.0000.00816.91
7.4.250.0040.00416.84
7.4.240.0040.00416.76
7.4.230.0040.00416.78
7.4.220.0040.00417.02
7.4.210.0100.00516.94
7.4.200.0040.00416.99
7.4.160.0080.00816.90
7.4.150.0150.00617.40
7.4.140.0090.01117.86
7.4.130.0120.00816.80
7.4.120.0090.01016.91
7.4.110.0180.00716.70
7.4.100.0110.01416.56
7.4.90.0140.01116.88
7.4.80.0000.02019.39
7.4.70.0040.01516.48
7.4.60.0100.00716.71
7.4.50.0000.01216.87
7.4.40.0070.01116.60
7.4.30.0140.01016.76
7.4.00.0090.00515.32
7.3.330.0070.00013.74
7.3.320.0000.00513.59
7.3.310.0000.00716.64
7.3.300.0000.00716.70
7.3.290.0070.00716.66
7.3.280.0120.00716.73
7.3.270.0160.00317.40
7.3.260.0100.01016.85
7.3.250.0080.01216.67
7.3.240.0110.00716.61
7.3.230.0120.01116.84
7.3.210.0110.01116.61
7.3.200.0120.00716.57
7.3.190.0090.00916.88
7.3.180.0120.00916.64
7.3.170.0080.00816.88
7.3.160.0000.01516.81
7.3.120.0030.01315.30
7.3.110.0100.00714.95
7.3.100.0070.01015.12
7.3.90.0060.01015.08
7.3.80.0110.00415.22
7.3.70.0030.00614.84
7.3.60.0100.00315.20
7.3.50.0060.00915.20
7.3.40.0090.00314.94
7.3.30.0030.01015.20
7.3.20.0060.00816.62
7.3.10.0030.00916.86
7.3.00.0060.00616.78
7.2.330.0100.01016.94
7.2.320.0190.00016.99
7.2.310.0120.01316.77
7.2.300.0070.01016.94
7.2.290.0110.00816.86
7.2.250.0100.01015.00
7.2.240.0030.01615.12
7.2.230.0060.01015.35
7.2.220.0100.00615.41
7.2.210.0030.01415.30
7.2.200.0110.00415.52
7.2.190.0120.00615.43
7.2.180.0060.00615.40
7.2.170.0070.00715.19
7.2.60.0000.01417.21
7.2.00.0040.00819.53
7.1.330.0090.00415.86
7.1.320.0060.00615.87
7.1.310.0040.00816.14
7.1.300.0000.01415.97
7.1.290.0030.01015.85
7.1.280.0030.00716.25
7.1.270.0070.00415.63
7.1.260.0030.01015.93
7.1.200.0060.00916.02
7.1.100.0060.00618.38
7.1.70.0000.01317.45
7.1.60.0090.01519.50
7.1.50.0100.01417.02
7.1.00.0070.07322.36
7.0.200.0000.00917.00
7.0.60.0170.07320.04
7.0.50.0030.07717.88
7.0.40.0130.05019.99
7.0.30.0230.05720.35
7.0.20.0230.04720.35
7.0.10.0070.04720.19
7.0.00.0200.07320.34
5.6.210.0030.08320.52
5.6.200.0070.08018.12
5.6.190.0130.08020.64
5.6.180.0600.06720.50
5.6.170.0230.05020.55
5.6.160.0070.08320.57
5.6.150.0070.03718.16
5.6.140.0130.05018.17
5.6.130.0170.07318.16
5.6.120.0030.07721.10
5.6.110.0070.08720.91
5.6.100.0070.08321.01
5.6.90.0070.06321.12
5.6.80.0130.03720.52
5.5.350.0030.08720.40
5.5.340.0070.04018.05
5.5.330.0170.04320.19
5.5.320.0000.09020.31
5.5.310.0130.07320.26
5.5.300.0100.03717.95
5.5.290.0030.04017.93
5.5.280.0130.08020.89
5.5.270.0100.04320.76
5.5.260.0030.08720.98
5.5.250.0130.07720.51
5.5.240.0100.07320.34

preferences:
32.1 ms | 401 KiB | 5 Q