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; $r = -1; var_dump(array_filter(split_preg($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)
8.3.60.0140.00716.63
8.3.50.0080.01122.24
8.3.40.0040.01118.79
8.3.30.0150.00018.85
8.3.20.0060.00320.14
8.3.10.0050.00323.64
8.3.00.0000.00819.91
8.2.180.0130.00616.75
8.2.170.0040.01122.96
8.2.160.0060.00920.34
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00420.98
8.2.120.0040.00426.35
8.2.110.0030.00619.27
8.2.100.0090.00318.09
8.2.90.0000.00819.36
8.2.80.0030.00617.97
8.2.70.0100.00317.75
8.2.60.0060.00317.93
8.2.50.0060.00318.10
8.2.40.0000.00819.19
8.2.30.0000.00720.61
8.2.20.0040.00417.96
8.2.10.0080.00018.17
8.2.00.0060.00318.16
8.1.280.0090.00625.92
8.1.270.0000.00819.02
8.1.260.0000.00828.09
8.1.250.0050.00328.09
8.1.240.0090.00022.66
8.1.230.0060.00617.76
8.1.220.0060.00317.74
8.1.210.0050.00318.77
8.1.200.0000.01017.25
8.1.190.0070.00317.48
8.1.180.0040.00418.10
8.1.170.0040.00418.84
8.1.160.0070.00020.91
8.1.150.0000.00819.09
8.1.140.0040.00419.64
8.1.130.0040.00417.87
8.1.120.0020.00517.66
8.1.110.0040.00417.54
8.1.100.0000.00717.59
8.1.90.0040.00417.68
8.1.80.0050.00317.62
8.1.70.0040.00417.57
8.1.60.0000.00817.80
8.1.50.0040.00417.76
8.1.40.0050.00317.70
8.1.30.0030.00617.77
8.1.20.0040.00417.84
8.1.10.0040.00417.86
8.1.00.0050.00517.76
8.0.300.0040.00418.77
8.0.290.0040.00416.88
8.0.280.0040.00418.60
8.0.270.0000.00717.34
8.0.260.0030.00317.35
8.0.250.0000.00717.22
8.0.240.0070.00017.24
8.0.230.0030.00317.13
8.0.220.0040.00417.22
8.0.210.0030.00317.24
8.0.200.0040.00417.25
8.0.190.0040.00417.14
8.0.180.0000.00717.17
8.0.170.0000.00717.15
8.0.160.0000.00717.20
8.0.150.0040.00417.14
8.0.140.0070.00017.14
8.0.130.0000.00713.64
8.0.120.0000.00917.15
8.0.110.0050.00217.00
8.0.100.0050.00316.99
8.0.90.0070.00017.19
8.0.80.0030.01317.18
8.0.70.0040.00417.15
8.0.60.0080.00017.03
8.0.50.0040.00417.13
8.0.30.0070.01117.49
8.0.20.0090.01217.52
8.0.10.0000.00817.14
8.0.00.0070.01416.95
7.4.330.0000.00516.79
7.4.320.0060.00016.89
7.4.300.0030.00316.79
7.4.290.0040.00416.87
7.4.280.0000.00916.83
7.4.270.0000.00816.80
7.4.260.0080.00016.79
7.4.250.0000.00816.70
7.4.240.0020.00516.82
7.4.230.0000.00716.97
7.4.220.0090.01016.78
7.4.210.0110.00716.99
7.4.200.0040.00416.67
7.4.160.0130.00416.74
7.4.150.0130.01317.40
7.4.140.0100.00817.86
7.4.130.0120.01116.78
7.4.120.0070.01116.78
7.4.110.0090.01216.96
7.4.100.0070.01016.68
7.4.90.0120.00616.82
7.4.80.0160.01019.39
7.4.70.0140.00416.70
7.4.60.0030.01316.86
7.4.50.0070.00516.64
7.4.40.0070.01116.77
7.4.30.0070.01016.87
7.4.00.0050.01115.17
7.3.330.0000.00713.71
7.3.320.0000.00513.59
7.3.310.0000.00716.74
7.3.300.0000.00716.60
7.3.290.0070.00816.67
7.3.280.0080.01016.76
7.3.270.0070.01417.40
7.3.260.0270.00016.80
7.3.250.0130.00816.66
7.3.240.0180.00416.66
7.3.230.0000.01816.61
7.3.210.0180.00016.56
7.3.200.0090.00916.46
7.3.190.0130.00616.52
7.3.180.0060.01016.52
7.3.170.0130.00716.86
7.3.160.0110.00716.81
7.3.120.0090.00915.44
7.3.110.0080.00815.04
7.3.100.0000.01515.25
7.3.90.0000.01315.09
7.3.80.0030.00615.36
7.3.70.0030.01114.97
7.3.60.0030.01014.84
7.3.50.0070.00715.07
7.3.40.0070.00714.94
7.3.30.0070.00415.16
7.3.20.0120.00316.93
7.3.10.0060.00916.91
7.3.00.0030.00717.01
7.2.330.0060.01816.95
7.2.320.0140.00816.91
7.2.310.0110.01317.03
7.2.300.0120.00917.02
7.2.290.0120.00616.70
7.2.250.0120.00615.26
7.2.240.0000.02015.22
7.2.230.0040.01515.30
7.2.220.0070.00315.46
7.2.210.0040.00815.25
7.2.200.0090.00915.31
7.2.190.0060.00615.22
7.2.180.0080.00615.25
7.2.170.0090.00315.02
7.2.60.0090.00617.24
7.2.00.0030.01019.73
7.1.330.0030.01416.12
7.1.320.0050.00515.94
7.1.310.0040.00816.11
7.1.300.0110.00416.10
7.1.290.0000.01515.94
7.1.280.0080.00416.15
7.1.270.0000.01316.05
7.1.260.0080.00816.04
7.1.200.0060.00616.13
7.1.100.0040.00916.58
7.1.70.0070.00717.59
7.1.60.0090.01519.50
7.1.50.0060.01917.11
7.1.00.0070.07722.47
7.0.200.0030.00616.96
7.0.60.0100.07719.82
7.0.50.0100.08017.91
7.0.40.0130.07020.26
7.0.30.0230.06320.24
7.0.20.0400.06720.27
7.0.10.0070.04020.37
7.0.00.0100.06720.39
5.6.280.0000.05321.12
5.6.210.0070.08320.61
5.6.200.0170.07718.30
5.6.190.0200.06720.55
5.6.180.0500.07320.67
5.6.170.0330.03720.71
5.6.160.0170.07320.57
5.6.150.0030.04318.16
5.6.140.0100.07718.18
5.6.130.0170.07718.23
5.6.120.0070.08321.11
5.6.110.0130.07021.01
5.6.100.0070.08321.15
5.6.90.0170.07720.98
5.6.80.0070.08020.39
5.5.350.0030.07020.43
5.5.340.0130.07017.99
5.5.330.0130.07020.47
5.5.320.0100.04320.36
5.5.310.0070.05320.57
5.5.300.0070.06317.93
5.5.290.0030.04317.98
5.5.280.0000.09020.82
5.5.270.0000.05020.86
5.5.260.0070.06720.78
5.5.250.0130.05020.56
5.5.240.0070.07720.37

preferences:
56.32 ms | 401 KiB | 5 Q