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)) { return $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)
8.3.60.0070.01116.63
8.3.50.0040.01118.27
8.3.40.0090.00618.98
8.3.30.0110.00418.92
8.3.20.0080.00020.46
8.3.10.0070.00023.47
8.3.00.0000.00819.38
8.2.180.0090.01318.18
8.2.170.0090.00622.96
8.2.160.0070.00720.39
8.2.150.0080.00025.66
8.2.140.0040.00424.66
8.2.130.0030.00917.63
8.2.120.0030.00526.35
8.2.110.0040.00422.38
8.2.100.0220.00017.75
8.2.90.0040.00419.21
8.2.80.0050.00317.97
8.2.70.0000.00817.75
8.2.60.0040.00818.04
8.2.50.0040.00418.07
8.2.40.0040.00419.51
8.2.30.0040.00420.59
8.2.20.0030.00517.80
8.2.10.0030.00618.31
8.2.00.0070.00018.24
8.1.280.0070.01825.92
8.1.270.0080.00022.17
8.1.260.0000.00828.09
8.1.250.0050.00328.09
8.1.240.0100.00022.51
8.1.230.0080.00417.79
8.1.220.0030.00517.89
8.1.210.0000.00818.77
8.1.200.0070.00317.48
8.1.190.0080.00017.48
8.1.180.0000.00818.10
8.1.170.0000.00918.71
8.1.160.0000.00722.04
8.1.150.0000.00820.80
8.1.140.0000.00819.56
8.1.130.0000.00717.45
8.1.120.0000.00717.62
8.1.110.0040.00417.63
8.1.100.0050.00217.54
8.1.90.0000.00717.57
8.1.80.0000.01117.57
8.1.70.0030.00317.45
8.1.60.0040.00417.69
8.1.50.0000.00817.62
8.1.40.0040.00417.60
8.1.30.0040.00417.70
8.1.20.0040.00417.75
8.1.10.0080.00017.57
8.1.00.0050.00317.49
8.0.300.0000.00818.77
8.0.290.0040.00416.88
8.0.280.0030.00318.43
8.0.270.0050.00217.30
8.0.260.0000.00716.92
8.0.250.0040.00417.03
8.0.240.0000.00716.96
8.0.230.0070.00017.02
8.0.220.0080.00017.04
8.0.210.0040.00417.00
8.0.200.0030.00317.02
8.0.190.0000.00817.05
8.0.180.0050.00217.03
8.0.170.0060.00317.01
8.0.160.0030.00617.12
8.0.150.0000.00816.90
8.0.140.0120.00016.89
8.0.130.0040.00413.35
8.0.120.0030.00716.99
8.0.110.0080.00016.94
8.0.100.0000.00716.85
8.0.90.0000.00716.82
8.0.80.0120.00916.98
8.0.70.0030.00517.12
8.0.60.0050.00317.07
8.0.50.0040.00416.89
8.0.30.0120.01017.10
8.0.20.0130.00817.40
8.0.10.0040.00417.18
8.0.00.0100.01016.79
7.4.330.0000.00515.21
7.4.320.0060.00016.64
7.4.300.0060.00016.59
7.4.290.0040.00416.71
7.4.280.0030.00516.68
7.4.270.0070.00316.63
7.4.260.0000.01116.57
7.4.250.0040.00416.63
7.4.240.0030.00416.62
7.4.230.0070.00016.72
7.4.220.0160.00616.66
7.4.210.0040.01116.79
7.4.200.0070.00016.50
7.4.160.0060.00916.53
7.4.150.0040.01417.40
7.4.140.0110.01417.86
7.4.130.0110.00916.59
7.4.120.0100.00816.57
7.4.110.0120.00616.56
7.4.100.0030.01916.77
7.4.90.0100.00716.58
7.4.80.0030.01519.39
7.4.70.0120.00616.62
7.4.60.0070.01016.55
7.4.50.0020.00216.38
7.4.40.0140.00416.52
7.4.30.0030.01416.70
7.4.00.0060.00615.03
7.3.330.0050.00013.44
7.3.320.0000.00613.41
7.3.310.0070.00016.46
7.3.300.0030.00316.31
7.3.290.0000.00716.50
7.3.280.0100.01016.39
7.3.270.0190.00617.40
7.3.260.0100.00716.52
7.3.250.0080.01016.51
7.3.240.0120.00416.41
7.3.230.0070.01016.39
7.3.210.0120.00416.53
7.3.200.0070.01416.45
7.3.190.0120.00416.60
7.3.180.0120.00616.47
7.3.170.0130.00916.79
7.3.160.0060.00916.42
7.3.120.0030.01314.77
7.3.110.0030.01314.99
7.3.100.0110.00415.14
7.3.90.0040.01114.86
7.3.80.0030.00614.56
7.3.70.0070.00715.02
7.3.60.0000.01314.87
7.3.50.0030.01014.70
7.3.40.0030.00614.64
7.3.30.0090.00614.69
7.3.20.0090.00616.69
7.3.10.0110.00016.70
7.3.00.0070.00716.65
7.2.330.0160.00716.55
7.2.320.0140.01016.93
7.2.310.0100.00616.60
7.2.300.0090.00616.58
7.2.290.0150.00916.78
7.2.240.0100.00615.25
7.2.230.0090.00315.10
7.2.220.0030.01315.23
7.2.210.0070.00715.03
7.2.200.0000.00815.22
7.2.190.0090.00615.30
7.2.180.0060.00615.07
7.2.170.0060.00615.08
7.2.160.0000.01315.10
7.2.150.0070.01116.97
7.2.140.0060.01217.02
7.2.130.0030.00616.96
7.2.120.0040.00716.84
7.2.110.0070.00716.84
7.2.100.0090.00616.90
7.2.90.0060.00917.09
7.2.80.0090.00316.99
7.2.70.0120.00617.16
7.2.60.0020.01117.04
7.2.50.0080.00616.93
7.2.40.0000.01417.08
7.2.30.0000.01017.02
7.2.20.0070.01016.94
7.2.10.0090.00616.96
7.2.00.0030.01018.30
7.1.330.0130.00315.91
7.1.320.0030.01015.70
7.1.310.0130.00015.79
7.1.300.0070.00315.91
7.1.290.0040.01115.47
7.1.280.0070.00316.01
7.1.270.0030.00715.84
7.1.260.0000.01615.79
7.1.250.0070.00715.76
7.1.200.0070.00315.90
7.1.100.0050.00518.18
7.1.70.0060.00917.00
7.1.60.0120.00919.48
7.1.50.0090.00616.93
7.1.00.0100.07022.32
7.0.200.0290.00814.42
7.0.60.0070.06020.00
7.0.50.0100.07717.89
7.0.40.0070.06020.32
7.0.30.0330.07020.26
7.0.20.0270.06320.19
7.0.10.0100.03720.07
7.0.00.0100.09020.16
5.6.280.0030.06320.89
5.6.210.0130.04320.67
5.6.200.0030.05718.13
5.6.190.0070.08320.46
5.6.180.0270.07720.55
5.6.170.0200.05020.48
5.6.160.0030.05720.59
5.6.150.0030.05018.22
5.6.140.0070.04718.14
5.6.130.0000.05718.14
5.6.120.0030.06020.99
5.6.110.0030.04321.12
5.6.100.0070.08320.99
5.6.90.0130.07021.00
5.6.80.0070.07320.43
5.5.350.4230.04020.41
5.5.340.0070.08317.99
5.5.330.0070.04020.18
5.5.320.0330.04720.36
5.5.310.0270.07020.34
5.5.300.0000.05317.95
5.5.290.0100.08017.97
5.5.280.0100.07720.74
5.5.270.0030.04720.98
5.5.260.0070.06720.66
5.5.250.0100.08020.71
5.5.240.0270.06720.24

preferences:
49.78 ms | 400 KiB | 5 Q