3v4l.org

run code in 300+ PHP versions simultaneously
<?php $primePalindromeFinder = new BetterPrimePalindromeFinder(1000, 1); var_dump($primePalindromeFinder->hasPrimePalindrome() ? $primePalindromeFinder->find() : 'NOPE'); $primePalindromeFinder = new BetterPrimePalindromeFinder(500, 400); var_dump($primePalindromeFinder->hasPrimePalindrome() ? $primePalindromeFinder->find() : 'NOPE'); // Exception #var_dump($primePalindromeFinder->find()); class BetterPrimePalindromeFinder { private $start; private $end; private $prime_palindrome; public function __construct(int $start, int $end) { $this->start = $start; $this->end = $end; for($i = $this->start; $i >= $this->end; $i--) { if($this->isPalindrome($i) && $this->isPrime($i)) { $this->prime_palindrome = $i; } } } public function find():int { if($this->hasPrimePalindrome()) { return $this->prime_palindrome; } throw new \Exception("No Prime Palindrome found between {$start} and {$end}"); } public function hasPrimePalindrome():bool { return $this->prime_palindrome !== null; } private function isPalindrome(int $number):bool { $number = strval($number); for($i = 1; $i <= floor(strlen($number) / 2); $i++) { $from_start = substr($number, $i - 1, 1); $from_end = substr($number, $i * -1, 1); if($from_start !== $from_end) { return false; } } return true; } private function isPrime(int $number):bool { if($number == 1) { return false; } if($number == 2) { return true; } if($number % 2 == 0) { return false; } for($i = 3; $i <= ceil(sqrt($number)); $i = $i + 2) { if($number % $i == 0) return false; } return true; } }

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)
8.3.40.0110.00418.70
8.3.30.0150.00018.92
8.3.20.0080.00020.20
8.3.10.0000.00823.79
8.3.00.0100.00319.38
8.2.170.0090.00622.96
8.2.160.0100.00320.45
8.2.150.0080.00025.66
8.2.140.0050.00324.66
8.2.130.0090.00317.75
8.2.120.0080.00026.35
8.2.110.0030.00620.34
8.2.100.0090.00617.92
8.2.90.0030.00519.30
8.2.80.0080.00017.97
8.2.70.0080.00017.63
8.2.60.0050.00517.93
8.2.50.0060.00318.07
8.2.40.0050.00319.51
8.2.30.0000.00720.77
8.2.20.0040.00417.67
8.2.10.0060.00318.29
8.2.00.0060.00318.37
8.1.270.0060.00322.12
8.1.260.0050.00328.09
8.1.250.0080.00028.09
8.1.240.0050.00517.83
8.1.230.0120.00017.59
8.1.220.0030.00517.78
8.1.210.0080.00018.77
8.1.200.0030.00617.36
8.1.190.0000.00817.35
8.1.180.0000.00818.10
8.1.170.0030.00618.70
8.1.160.0000.00822.13
8.1.150.0080.00019.04
8.1.140.0030.00519.56
8.1.130.0000.00717.77
8.1.120.0040.00417.55
8.1.110.0070.00017.55
8.1.100.0040.00417.57
8.1.90.0000.00717.58
8.1.80.0070.00317.59
8.1.70.0020.00517.47
8.1.60.0040.00417.57
8.1.50.0000.00817.64
8.1.40.0040.00417.63
8.1.30.0000.00817.67
8.1.20.0000.00817.65
8.1.10.0000.00817.70
8.1.00.0080.00017.58
8.0.300.0040.00418.77
8.0.290.0040.00416.75
8.0.280.0000.00718.52
8.0.270.0050.00217.43
8.0.260.0040.00417.41
8.0.250.0000.00716.97
8.0.240.0070.00016.96
8.0.230.0000.00716.95
8.0.220.0000.00716.96
8.0.210.0080.00017.01
8.0.200.0030.00317.05
8.0.190.0040.00417.00
8.0.180.0040.00417.02
8.0.170.0000.00816.88
8.0.160.0000.00817.09
8.0.150.0000.00816.93
8.0.140.0060.00616.89
8.0.130.0080.00013.41
8.0.120.0040.00416.81
8.0.110.0000.00817.04
8.0.100.0070.00017.06
8.0.90.0000.00716.89
8.0.80.0110.01116.99
8.0.70.0030.00517.02
8.0.60.0040.00416.88
8.0.50.0080.00016.93
8.0.30.0100.00817.33
8.0.20.0130.00717.45
8.0.10.0030.00617.19
8.0.00.0120.00616.80
7.4.330.0000.00515.15
7.4.320.0000.00616.70
7.4.300.0030.00316.66
7.4.290.0040.00416.63
7.4.280.0040.00416.58
7.4.270.0070.00416.74
7.4.260.0050.00516.67
7.4.250.0040.00416.53
7.4.240.0020.00516.69
7.4.230.0000.00716.71
7.4.220.0100.01016.52
7.4.210.0070.01016.73
7.4.200.0000.00716.72
7.4.160.0120.00416.56
7.4.150.0070.01117.40
7.4.140.0060.01117.86
7.4.130.0100.01116.59
7.4.120.0150.00616.68
7.4.110.0040.01416.75
7.4.100.0090.01516.61
7.4.90.0190.00316.66
7.4.80.0030.01519.39
7.4.70.0100.00716.52
7.4.60.0100.00616.61
7.4.50.0040.00416.42
7.4.40.0070.01016.76
7.4.30.0140.00516.75
7.4.10.0030.01314.95
7.4.00.0070.01114.89
7.3.330.0030.00313.40
7.3.320.0050.00013.45
7.3.310.0030.00316.47
7.3.300.0040.00416.41
7.3.290.0000.00716.49
7.3.280.0090.01116.47
7.3.270.0150.00317.40
7.3.260.0100.00716.57
7.3.250.0130.00516.54
7.3.240.0070.01316.47
7.3.230.0080.01116.70
7.3.210.0060.01516.68
7.3.200.0160.00816.52
7.3.190.0170.00016.47
7.3.180.0090.01016.59
7.3.170.0080.01416.63
7.3.160.0060.00916.58
7.3.130.0100.00714.99
7.3.120.0080.01014.85
7.3.110.0080.01014.90
7.3.100.0070.01014.95
7.3.90.0050.00914.93
7.3.80.0070.00814.86
7.3.70.0070.00614.81
7.3.60.0050.00814.81
7.3.50.0040.01014.85
7.3.40.0070.00714.71
7.3.30.0060.00714.75
7.3.20.0060.00916.70
7.3.10.0050.00916.62
7.3.00.0040.01016.61
7.2.330.0130.01016.78
7.2.320.0130.01016.82
7.2.310.0000.01616.88
7.2.300.0100.00716.66
7.2.290.0130.01016.93
7.2.260.0030.01014.88
7.2.250.0060.01115.07
7.2.240.0070.01214.94
7.2.230.0060.01015.00
7.2.220.0070.01015.00
7.2.210.0070.00915.02
7.2.200.0080.00715.09
7.2.190.0040.01115.13
7.2.180.0060.00915.10
7.2.170.0060.01115.19
7.2.160.0050.00514.75
7.2.150.0040.01217.04
7.2.140.0040.01216.85
7.2.130.0000.01216.99
7.2.120.0030.00916.96
7.2.110.0120.00316.72
7.2.100.0030.01016.94
7.2.90.0000.01317.00
7.2.80.0100.00316.95
7.2.70.0030.01316.64
7.2.60.0060.00916.73
7.2.50.0100.00317.02
7.2.40.0090.00617.17
7.2.30.0100.00317.02
7.2.20.0040.01416.88
7.2.10.0100.00716.83
7.2.00.0070.01018.09
7.1.330.0050.01115.81
7.1.320.0070.00815.89
7.1.310.0030.00815.76
7.1.300.0060.01015.85
7.1.290.0050.01015.78
7.1.280.0090.00415.84
7.1.270.0020.01315.70
7.1.260.0020.01315.78
7.1.250.0000.01415.79
7.1.240.0040.01415.83
7.1.230.0090.00915.93
7.1.220.0040.00815.91
7.1.210.0000.01015.89
7.1.200.0070.00615.82
7.1.190.0080.00615.77
7.1.180.0070.00716.01
7.1.170.0070.00715.82
7.1.160.0090.00615.91
7.1.150.0070.00415.95
7.1.140.0000.01515.90
7.1.130.0040.01116.00
7.1.120.0040.01415.91
7.1.110.0060.01015.96
7.1.100.0030.01017.10
7.1.90.0090.00315.79
7.1.80.0040.01115.59
7.1.70.0020.01116.53
7.1.60.0080.01617.71
7.1.50.0000.01916.57
7.1.40.0060.00315.94
7.1.30.0000.00915.79
7.1.20.0000.00915.70
7.1.10.0060.00915.90
7.1.00.0030.04319.13
7.0.330.0090.00615.48
7.0.320.0000.01315.43
7.0.310.0060.00915.28
7.0.300.0070.01015.51
7.0.290.0120.00615.55
7.0.280.0000.01715.42
7.0.270.0050.00515.36
7.0.260.0000.01415.20
7.0.250.0030.01015.58
7.0.240.0030.01315.14
7.0.230.0030.01015.45
7.0.220.0030.00615.36
7.0.210.0070.01015.25
7.0.200.0170.01115.04
7.0.190.0070.01015.25
7.0.180.0060.00915.41
7.0.170.0030.01115.39
7.0.160.0060.00915.32
7.0.150.0000.01515.50
7.0.140.0070.00715.48
7.0.130.0040.00715.61
7.0.120.0060.00915.62
7.0.110.0040.01015.56
7.0.100.0040.00815.64
7.0.90.0030.00915.54
7.0.80.0060.00615.34
7.0.70.0070.01115.48
7.0.60.0080.04117.68
7.0.50.0090.02716.64
7.0.40.0080.04316.75
7.0.30.0130.04516.72
7.0.20.0190.04216.81
7.0.10.0060.02416.69
7.0.00.0070.05016.62
5.6.400.0030.00614.04
5.6.390.0000.01814.07
5.6.380.0000.01414.07
5.6.370.0030.00614.07
5.6.360.0060.01014.11
5.6.350.0090.00613.80
5.6.340.0100.00714.37
5.6.330.0060.00614.18
5.6.320.0040.01114.47
5.6.310.0070.00714.00
5.6.300.0030.00913.97
5.6.290.0040.00813.98
5.6.280.0070.02317.61
5.6.270.0070.00713.88
5.6.260.0040.01114.25
5.6.250.0130.00013.85
5.6.240.0070.00714.21
5.6.230.0100.00314.02
5.6.220.0040.01414.36
5.6.210.0030.02517.37
5.6.200.0030.04316.11
5.6.190.0070.03917.28
5.6.180.0120.04817.30
5.6.170.0240.03817.38
5.6.160.0080.02817.26
5.6.150.0020.03016.16
5.6.140.0000.03116.07
5.6.130.0080.04416.17
5.6.120.0050.03517.65
5.6.110.0020.04817.50
5.6.100.0050.04517.53
5.6.90.0080.04417.55
5.6.80.0050.02817.37
5.6.70.0080.00814.08
5.6.60.0070.01013.76
5.6.50.0070.00714.22
5.6.40.0090.00914.07
5.6.30.0000.01714.00
5.6.20.0040.00814.00
5.6.10.0050.01014.17
5.6.00.0090.00914.21
5.5.380.0090.00614.30
5.5.370.0070.00714.05
5.5.360.0040.01113.93
5.5.350.2110.02117.19
5.5.340.0050.04616.03
5.5.330.0030.02616.94
5.5.320.0140.04117.32
5.5.310.0220.03517.05
5.5.300.0070.04516.11
5.5.290.0000.02716.02
5.5.280.0070.03217.34
5.5.270.0110.03317.45
5.5.260.0080.04517.61
5.5.250.0100.03717.20
5.5.240.0100.01817.05
5.5.230.0040.01113.96
5.5.220.0070.00714.03
5.5.210.0070.00714.04
5.5.200.0070.01013.96
5.5.190.0070.00714.19
5.5.180.0030.01214.13
5.5.170.0070.00314.20
5.5.160.0060.00613.92
5.5.150.0110.00413.96
5.5.140.0100.00714.00
5.5.130.0100.00014.04
5.5.120.0030.01014.04
5.5.110.0040.01214.08
5.5.100.0030.01014.16
5.5.90.0070.00313.77
5.5.80.0040.00814.07
5.5.70.0030.00913.58
5.5.60.0070.00413.70
5.5.50.0030.00814.02
5.5.40.0080.00813.78
5.5.30.0030.01013.56
5.5.20.0000.01714.03
5.5.10.0030.00613.96
5.5.00.0070.00313.73

preferences:
44.93 ms | 400 KiB | 5 Q