3v4l.org

run code in 300+ PHP versions simultaneously
<?php ob_start(); echo '#+++++++++++++++++++++++++++++++++++#' . PHP_EOL; echo '# Checking if a constant is defined #' . PHP_EOL; echo '# always retuns (bool)false in PHP. #' . PHP_EOL; echo '# Even if it has been defined! #' . PHP_EOL; echo '#+++++++++++++++++++++++++++++++++++#' . PHP_EOL; error_reporting(E_ALL); echo 'Testing on PHP version ' . PHP_VERSION . PHP_EOL . PHP_EOL; #ob_flush(); flush(); sleep(1); echo 'Checking if `__DIR__` is defined...' . PHP_EOL; if (!defined('__DIR__')) { #ob_flush(); flush(); sleep(2); echo 'Nope, `defined()` returned `(bool)false`.' . PHP_EOL; echo 'So, seems like the magic constant `__DIR__` is not defined.' . PHP_EOL . PHP_EOL; #ob_flush(); flush(); sleep(2); echo 'No prob. Executing `define(\'__DIR__\', \'/foo/bar\')`...' . PHP_EOL; define('__DIR__', '/foo/bar'); #ob_flush(); flush(); sleep(1); echo 'Done, defined `__DIR__` as "/foo/bar".' . PHP_EOL . PHP_EOL; #ob_flush(); flush(); sleep(1); echo 'Double-checking `__DIR__` is defined now...' . PHP_EOL; #ob_flush(); flush(); sleep(2); if (!defined('__DIR__')) { echo 'WTF, `defined(\'__DIR__\')` again returned `(bool)false`?!' . PHP_EOL; } else{ echo 'Strike, this time `defined(\'__DIR__\')` returned `(bool)true`.' . PHP_EOL; echo 'So, seems like `__DIR__` was successfully defined. :)' . PHP_EOL . PHP_EOL; } } else{ echo 'Yep, `defined(\'__DIR__\')` returned `(bool)true`.' . PHP_EOL; echo 'The magic constant `__DIR__` seems to be defined.' . PHP_EOL . PHP_EOL; } #ob_flush(); flush(); sleep(2); echo 'Finally, here is the result of `var_dump(__DIR__)`:' . PHP_EOL; var_dump(__DIR__); #ob_flush(); flush(); sleep(1); if ("/foo/bar" != __DIR__) { echo 'But, wait..' . PHP_EOL; echo 'I defined `__DIR__` as "/foo/bar" - not as "' . __DIR__ .'"?! What happend?' . PHP_EOL . PHP_EOL; #ob_flush(); flush(); sleep(1); echo 'In fact, `__DIR__` was already defined when first checked.' . PHP_EOL; echo 'But 1) `defined(\'__MAGIC_CONSTANT__\')` ALWAYS returns `(bool)false`' . PHP_EOL; echo 'and 2) defined constants can not be overwritten.' . PHP_EOL; }

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)
8.3.60.0150.00018.30
8.3.50.0120.00721.99
8.3.40.0150.00018.79
8.3.30.0100.00318.75
8.3.20.0040.00420.29
8.3.10.0080.00023.70
8.3.00.0080.00020.69
8.2.180.0080.00818.40
8.2.170.0040.01222.96
8.2.160.0070.00722.25
8.2.150.0080.00024.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0070.00721.11
8.2.110.0080.00021.00
8.2.100.0100.00317.72
8.2.90.0050.00317.84
8.2.80.0000.00818.22
8.2.70.0000.00817.50
8.2.60.0040.00417.50
8.2.50.0040.00417.80
8.2.40.0060.00317.93
8.2.30.0080.00018.02
8.2.20.0000.00817.57
8.2.10.0030.00519.43
8.2.00.0040.00417.68
8.1.280.0100.00725.92
8.1.270.0060.00322.03
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0140.00722.52
8.1.230.0090.00320.85
8.1.220.0000.00817.74
8.1.210.0040.00418.88
8.1.200.0080.00017.25
8.1.190.0000.00817.23
8.1.180.0080.00018.10
8.1.170.0030.00517.62
8.1.160.0030.00622.04
8.1.150.0000.00818.64
8.1.140.0040.00417.36
8.1.130.0030.00517.78
8.1.120.0070.00017.44
8.1.110.0000.00817.32
8.1.100.0040.00417.45
8.1.90.0000.00717.39
8.1.80.0000.00717.38
8.1.70.0000.00717.36
8.1.60.0050.00317.52
8.1.50.0050.00517.48
8.1.40.0050.00317.35
8.1.30.0040.00417.47
8.1.20.0000.00917.59
8.1.10.0050.00317.35
8.1.00.0030.00717.43
8.0.300.0050.00219.98
8.0.290.0040.00416.75
8.0.280.0030.00318.38
8.0.270.0000.00717.20
8.0.260.0030.00616.78
8.0.250.0030.00316.89
8.0.240.0030.00616.86
8.0.230.0030.00316.95
8.0.220.0000.00816.91
8.0.210.0030.00316.96
8.0.200.0000.01016.93
8.0.190.0030.00316.93
8.0.180.0000.00916.96
8.0.170.0050.00316.92
8.0.160.0000.00716.95
8.0.150.0000.00816.93
8.0.140.0000.00716.78
8.0.130.0030.00313.26
8.0.120.0030.00616.87
8.0.110.0040.00416.95
8.0.100.0040.00416.97
8.0.90.0000.00716.78
8.0.80.0120.00316.86
8.0.70.0050.00316.90
8.0.60.0000.00716.94
8.0.50.0000.00816.76
8.0.30.0120.00817.14
8.0.20.0100.00917.40
8.0.10.0040.00417.09
8.0.00.0110.00716.67
7.4.330.0000.00515.09
7.4.320.0030.00316.57
7.4.300.0060.00016.44
7.4.290.0000.00716.55
7.4.280.0030.00316.55
7.4.270.0040.00416.56
7.4.260.0040.00416.38
7.4.250.0050.00316.28
7.4.240.0020.00616.40
7.4.230.0030.00316.43
7.4.220.0170.00316.52
7.4.210.0080.00916.53
7.4.200.0030.00316.47
7.4.190.0040.00416.58
7.4.160.0090.00616.43
7.4.150.0120.00817.40
7.4.140.0140.00717.86
7.4.130.0050.01716.47
7.4.120.0100.00716.46
7.4.110.0060.01316.31
7.4.100.0110.01016.45
7.4.90.0110.00616.42
7.4.80.0090.01516.45
7.4.70.0130.00316.41
7.4.60.0090.00616.43
7.4.50.0060.00016.59
7.4.40.0040.01122.77
7.4.30.0120.00316.44
7.4.00.0100.00714.81
7.3.330.0030.00313.13
7.3.320.0000.00613.06
7.3.310.0030.00516.15
7.3.300.0070.00016.26
7.3.290.0050.00916.18
7.3.280.0110.00816.24
7.3.270.0150.00417.40
7.3.260.0110.00716.20
7.3.250.0090.01116.32
7.3.240.0160.00616.26
7.3.230.0000.01616.39
7.3.210.0110.00616.19
7.3.200.0140.00619.39
7.3.190.0090.01216.25
7.3.180.0000.01616.48
7.3.170.0100.00716.30
7.3.160.0000.01616.26
7.3.120.0040.01414.69
7.3.10.0060.00616.58
7.3.00.0080.00416.47
7.2.330.0030.01716.66
7.2.320.0100.00716.65
7.2.310.0090.00916.35
7.2.300.0140.00416.36
7.2.290.0100.00616.55
7.2.130.0030.00916.67
7.2.120.0060.00816.65
7.2.110.0000.01116.55
7.2.100.0040.01116.87
7.2.90.0000.01416.86
7.2.80.0060.00917.00
7.2.70.0000.00916.80
7.2.60.0060.00916.85
7.2.50.0110.00416.55
7.2.40.0070.00716.47
7.2.30.0080.00816.68
7.2.20.0000.01216.85
7.2.10.0000.01316.41
7.2.00.0030.01017.82
7.1.250.0030.01015.72
7.1.100.0030.00718.02
7.1.70.0000.01816.75
7.1.60.0060.01019.32
7.1.50.0060.01616.81
7.1.00.0030.07722.48
7.0.200.0120.00416.67
7.0.140.0070.06722.12
7.0.100.0100.08019.95
7.0.90.0030.08719.90
7.0.80.0130.07320.11
7.0.70.0070.08319.89
7.0.60.0100.07719.85
7.0.50.0030.08722.05
7.0.40.0070.07720.14
7.0.30.0030.08720.04
7.0.20.0100.08319.99
7.0.10.0030.08320.14
7.0.00.0170.07720.01
5.6.280.0100.06321.11
5.6.250.0200.04020.55
5.6.240.0130.07020.59
5.6.230.0100.08720.68
5.6.220.0030.08320.60
5.6.210.0170.07320.58
5.6.200.0100.08020.91
5.6.190.0130.08021.14
5.6.180.0100.08320.95
5.6.170.0000.08021.08
5.6.160.0070.08320.99
5.6.150.0030.08321.03
5.6.140.0000.08721.07
5.6.130.0030.08320.90
5.6.120.0130.07721.07
5.6.110.0170.07021.07
5.6.100.0070.08021.02
5.6.90.0000.07720.96
5.6.80.0070.08020.36
5.6.70.0030.07720.38
5.6.60.0100.08020.36
5.6.50.0200.06320.45
5.6.40.0000.04320.34
5.6.30.0030.06320.41
5.6.20.0130.05720.43
5.6.10.0070.03720.41
5.6.00.0170.03020.48
5.5.380.0170.07020.31
5.5.370.0100.07720.38
5.5.360.0100.08020.47
5.5.350.0100.08320.42
5.5.340.0030.08720.88
5.5.330.0070.08720.72
5.5.320.0100.07320.80
5.5.310.0000.08020.75
5.5.300.0030.07720.85
5.5.290.0000.09020.84
5.5.280.0030.08720.89
5.5.270.0170.07020.60
5.5.260.0070.07720.86
5.5.250.0130.07720.43
5.5.240.0070.08320.28
5.5.230.0000.08320.26
5.5.220.0100.07720.11
5.5.210.0070.08320.23
5.5.200.0000.04320.25
5.5.190.0030.04020.16
5.5.180.0070.04020.24
5.5.160.0070.03720.21
5.5.150.0070.03720.19
5.5.140.0000.04320.23
5.5.130.0070.03720.23
5.5.120.0100.04320.20
5.5.110.0130.04320.14
5.5.100.0130.07720.05
5.5.90.0100.07020.07
5.5.80.0030.07319.91
5.5.70.0030.05320.09
5.5.60.0070.07020.06
5.5.50.0130.04720.02
5.5.40.0030.07020.07
5.5.30.0070.04720.02
5.5.20.0100.04320.05
5.5.10.0070.07020.02
5.5.00.0030.04020.02
5.4.450.0030.08319.29
5.4.440.0100.07719.30
5.4.430.0100.07719.11
5.4.420.0000.08719.36
5.4.410.0070.07319.18
5.4.400.0030.08019.08
5.4.390.0030.08718.81
5.4.380.0130.07019.09
5.4.370.0130.06319.10
5.4.360.0030.05319.09
5.4.350.0100.06318.95
5.4.340.0070.03719.10
5.4.320.0030.03718.82
5.4.310.0070.03319.12
5.4.300.0030.04019.00
5.4.290.0000.04319.07
5.4.280.0000.06318.81
5.4.270.0030.05719.20
5.4.260.0130.07018.90
5.4.250.0070.07319.07
5.4.240.0070.04019.02
5.4.230.0070.04019.02
5.4.220.0070.05718.98
5.4.210.0030.03718.89
5.4.200.0170.03318.81
5.4.190.0030.07719.02
5.4.180.0070.04018.80
5.4.170.0070.05318.77
5.4.160.0000.04019.04
5.4.150.0030.04319.15
5.4.140.0000.04316.29
5.4.130.0000.08016.27
5.4.120.0130.04716.23
5.4.110.0070.05716.33
5.4.100.0030.06316.27
5.4.90.0030.04316.22
5.4.80.0030.05316.38
5.4.70.0070.04716.22
5.4.60.0100.04316.25
5.4.50.0070.05716.18
5.4.40.0100.03316.37
5.4.30.0070.04316.33
5.4.20.0070.03316.29
5.4.10.0030.03716.41
5.4.00.0030.04715.77
5.3.290.0030.03714.67
5.3.280.0030.07014.43
5.3.270.0000.04714.48
5.3.260.0000.05014.55
5.3.250.0030.05314.62
5.3.240.0030.04014.60
5.3.230.0070.03714.48
5.3.220.0030.04314.53
5.3.210.0070.04014.40
5.3.200.0030.03714.57
5.3.190.0030.03714.54
5.3.180.0100.04714.55
5.3.170.0070.04314.44
5.3.160.0000.04014.41
5.3.150.0000.04314.43
5.3.140.0000.04314.54
5.3.130.0000.04014.39
5.3.120.0070.04014.43
5.3.110.0030.04014.41
5.3.100.0070.03713.91
5.3.90.0100.03013.88
5.3.80.0000.04014.00
5.3.70.0070.03713.89
5.3.60.0070.03714.02
5.3.50.0070.03313.96
5.3.40.0030.04013.92
5.3.30.0030.08013.93
5.3.20.0000.07013.62
5.3.10.0130.05713.43
5.3.00.0130.06013.44
5.2.170.0000.03312.36
5.2.160.0030.02712.36
5.2.150.0130.05012.36
5.2.140.0070.03012.36
5.2.130.0000.06312.36
5.2.120.0030.05012.36
5.2.110.0000.03712.36
5.2.100.0100.05312.36
5.2.90.0030.06712.36
5.2.80.0030.05312.36
5.2.70.0070.05312.36
5.2.60.0030.06312.36
5.2.50.0100.05312.36
5.2.40.0130.05312.36
5.2.30.0030.03012.36
5.2.20.0030.06012.36
5.2.10.0070.05712.36
5.2.00.0000.05312.36
5.1.60.0030.05312.36
5.1.50.0070.04712.36
5.1.40.0000.05312.36
5.1.30.0070.05312.36
5.1.20.0130.04312.36
5.1.10.0030.05312.36
5.1.00.0100.05312.36
5.0.50.0070.04712.36
5.0.40.0070.04312.36
5.0.30.0100.05012.36
5.0.20.0030.04312.36
5.0.10.0030.03712.36
5.0.00.0000.05712.36
4.4.90.0000.03312.36
4.4.80.0030.03712.36
4.4.70.0030.03712.36
4.4.60.0070.03312.36
4.4.50.0070.03312.36
4.4.40.0070.03312.36
4.4.30.0000.03712.36
4.4.20.0070.03012.36
4.4.10.0000.03712.36
4.4.00.0030.05312.36
4.3.110.0000.03712.36
4.3.100.0030.03312.36
4.3.90.0000.03712.36
4.3.80.0030.04012.36
4.3.70.0000.03712.36
4.3.60.0000.03012.36
4.3.50.0000.04012.36
4.3.40.0030.04712.36
4.3.30.0030.03312.36
4.3.20.0000.03312.36
4.3.10.0000.03312.36
4.3.00.0030.03312.36

preferences:
55.92 ms | 400 KiB | 5 Q