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)
8.3.60.0120.00618.55
8.3.50.0090.00922.05
8.3.40.0090.00918.72
8.3.30.0040.01118.85
8.3.20.0070.00718.64
8.3.10.0080.00020.35
8.3.00.0040.00421.86
8.2.180.0120.00616.63
8.2.170.0130.00918.97
8.2.160.0030.01022.96
8.2.150.0040.00424.18
8.2.140.0030.00624.66
8.2.130.0000.00826.16
8.2.120.0090.00019.83
8.2.110.0000.01122.11
8.2.100.0090.00317.70
8.2.90.0050.00319.22
8.2.80.0080.00017.97
8.2.70.0050.00317.38
8.2.60.0060.00317.90
8.2.50.0050.00318.07
8.2.40.0040.00418.22
8.2.30.0090.00018.02
8.2.20.0030.00517.67
8.2.10.0080.00017.71
8.2.00.0000.01017.76
8.1.280.0060.00925.92
8.1.270.0080.00023.99
8.1.260.0090.00026.35
8.1.250.0050.00528.09
8.1.240.0060.00322.42
8.1.230.0080.00321.02
8.1.220.0040.00418.77
8.1.210.0050.00318.88
8.1.200.0000.00917.23
8.1.190.0050.00217.39
8.1.180.0040.00418.10
8.1.170.0050.00318.55
8.1.160.0000.00818.85
8.1.150.0000.00718.50
8.1.140.0050.00217.44
8.1.130.0050.00317.82
8.1.120.0040.00417.39
8.1.110.0000.00717.42
8.1.100.0040.00417.30
8.1.90.0040.00317.30
8.1.80.0070.00017.37
8.1.70.0070.00017.39
8.1.60.0060.00317.41
8.1.50.0040.00417.31
8.1.40.0040.00417.50
8.1.30.0000.00717.65
8.1.20.0000.00717.51
8.1.10.0050.00217.43
8.1.00.0000.00717.46
8.0.300.0040.00419.89
8.0.290.0040.00417.16
8.0.280.0070.00018.43
8.0.270.0000.00717.21
8.0.260.0000.00616.76
8.0.250.0040.00416.98
8.0.240.0040.00416.96
8.0.230.0000.00716.89
8.0.220.0040.00416.87
8.0.210.0080.00016.82
8.0.200.0040.00416.94
8.0.190.0050.00316.94
8.0.180.0060.00316.94
8.0.170.0060.00316.85
8.0.160.0070.00016.96
8.0.150.0000.00816.84
8.0.140.0050.00316.87
8.0.130.0030.00313.31
8.0.120.0080.00016.82
8.0.110.0040.00416.77
8.0.100.0000.00716.94
8.0.90.0040.00416.71
8.0.80.0150.00016.90
8.0.70.0000.00716.97
8.0.60.0030.00516.97
8.0.50.0080.00016.89
8.0.30.0140.00516.92
8.0.20.0100.00817.40
8.0.10.0030.00317.01
8.0.00.0130.00416.74
7.4.330.0030.00314.71
7.4.320.0030.00316.46
7.4.300.0090.00016.55
7.4.290.0000.00716.55
7.4.280.0070.00016.54
7.4.270.0040.00416.36
7.4.260.0030.00313.21
7.4.250.0000.00816.39
7.4.240.0000.00716.41
7.4.230.0030.00316.60
7.4.220.0040.01316.34
7.4.210.0090.01016.41
7.4.200.0070.00016.51
7.4.190.0030.00316.62
7.4.160.0140.00316.33
7.4.150.0140.00317.40
7.4.140.0070.01017.86
7.4.130.0070.01116.46
7.4.120.0120.00816.42
7.4.110.0000.01816.50
7.4.100.0070.01016.48
7.4.90.0060.01216.22
7.4.80.0130.00419.04
7.4.70.0070.01016.52
7.4.60.0030.01416.39
7.4.50.0090.00016.13
7.4.40.0080.00322.27
7.4.30.0110.01316.50
7.4.00.0070.01014.94
7.3.330.0000.00613.07
7.3.320.0020.00213.09
7.3.310.0020.00516.25
7.3.300.0000.00716.22
7.3.290.0070.01016.27
7.3.280.0100.00816.23
7.3.270.0120.00917.40
7.3.260.0150.00518.24
7.3.250.0120.00716.27
7.3.240.0030.01416.30
7.3.230.0120.00616.39
7.3.210.0100.00716.48
7.3.200.0090.01319.39
7.3.190.0120.00916.54
7.3.180.0120.00416.21
7.3.170.0080.00816.39
7.3.160.0140.00316.26
7.3.120.0030.01317.15
7.3.110.0080.00617.15
7.3.100.0100.00317.15
7.3.90.0070.00317.15
7.3.80.0030.00917.15
7.3.70.0040.00717.15
7.3.60.0090.00617.15
7.3.50.0040.01217.15
7.3.40.0120.00317.15
7.3.30.0090.00317.15
7.3.20.0040.00717.15
7.3.10.0090.00617.15
7.3.00.0030.00717.15
7.2.330.0090.01516.50
7.2.320.0070.01016.73
7.2.310.0080.01216.30
7.2.300.0070.01016.57
7.2.290.0120.00616.61
7.2.240.0030.01217.15
7.2.230.0070.01017.15
7.2.220.0030.01317.15
7.2.210.0060.01017.15
7.2.200.0070.01017.15
7.2.190.0070.01117.15
7.2.180.0040.00717.15
7.2.170.0040.01117.15
7.2.160.0090.00617.15
7.2.150.0090.00617.15
7.2.140.0070.00717.15
7.2.130.0070.01117.15
7.2.120.0040.01117.15
7.2.110.0030.01017.15
7.2.100.0040.01117.15
7.2.90.0140.00317.15
7.2.80.0070.00417.15
7.2.70.0070.00717.15
7.2.60.0030.01217.15
7.2.50.0030.00917.15
7.2.40.0070.00717.15
7.2.30.0120.00617.15
7.2.20.0100.00717.15
7.2.10.0000.01017.15
7.2.00.0090.00518.15
7.1.330.0030.00717.15
7.1.320.0110.00317.15
7.1.310.0090.00617.15
7.1.300.0030.01217.15
7.1.290.0090.00617.15
7.1.280.0040.01117.15
7.1.270.0110.00617.15
7.1.260.0040.01117.15
7.1.250.0110.00717.15
7.1.200.0000.01115.83
7.1.100.0000.01118.11
7.1.70.0000.00817.00
7.1.60.0070.00719.40
7.1.50.0070.01416.51
7.1.00.0030.04722.36
7.0.200.0070.00016.85
7.0.140.0000.07322.01
7.0.60.0030.07719.94
7.0.50.0070.04017.91
7.0.40.0100.03717.66
7.0.30.0200.06717.76
7.0.20.0070.06717.75
7.0.10.0200.06717.78
7.0.00.0100.08017.68
5.6.280.0000.07720.87
5.6.210.0100.05020.54
5.6.200.0030.06318.13
5.6.190.0070.03718.16
5.6.180.0030.05718.12
5.6.170.0000.09318.15
5.6.160.0070.07018.17
5.6.150.0070.07718.21
5.6.140.0130.05718.07
5.6.130.0070.08018.20
5.6.120.0030.08018.18
5.6.110.0030.04718.08
5.6.100.0130.04718.14
5.6.90.0100.07718.14
5.6.80.0070.07317.49
5.6.70.0100.07317.60
5.6.60.0070.07317.57
5.6.50.0030.08317.60
5.6.40.0070.07717.57
5.6.30.0030.08017.47
5.6.20.0100.06717.50
5.6.10.0100.06717.57
5.6.00.0070.06317.43
5.5.350.4170.04720.34
5.5.340.0070.04018.01
5.5.330.0100.07717.91
5.5.320.0030.05317.93
5.5.310.0100.07717.97
5.5.300.0130.07017.97
5.5.290.0100.07018.01
5.5.280.0070.05717.97
5.5.270.0030.04017.91
5.5.260.0030.08717.97
5.5.250.0030.07017.79
5.5.240.0030.06717.37
5.5.230.0000.09017.36
5.5.220.0070.07717.26
5.5.210.0100.05017.30
5.5.200.0100.06717.29
5.5.190.0100.07717.33
5.5.180.0130.07717.27
5.5.160.0100.04717.34
5.5.150.0070.08017.39
5.5.140.0070.08017.29
5.5.130.0130.07017.32
5.5.120.0030.08317.28
5.5.110.0070.05017.32
5.5.100.0070.08017.13
5.5.90.0000.05317.17
5.5.80.0000.08017.27
5.5.70.0030.04017.25
5.5.60.0070.07717.22
5.5.50.0070.06017.15
5.5.40.0130.07017.21
5.5.30.0070.08017.16
5.5.20.0070.04717.22
5.5.10.0070.06317.25
5.5.00.0100.07017.25
5.4.450.0030.08019.16
5.4.440.0070.05719.31
5.4.430.0070.03719.14
5.4.420.0130.03019.41
5.4.410.0100.07719.22
5.4.400.0070.08018.99
5.4.390.0030.08018.98
5.4.380.0100.05319.06
5.4.370.0130.06718.98
5.4.360.0070.07318.89
5.4.350.0100.07719.12
5.4.340.0170.06319.01
5.4.320.0100.07718.99
5.4.310.0100.07018.95
5.4.300.0030.05718.82
5.4.290.0030.04018.99
5.4.280.0100.07319.02
5.4.270.0070.08018.95
5.4.260.0000.05318.99
5.4.250.0030.07719.07
5.4.240.0030.05718.98
5.4.230.0070.03719.04
5.4.220.0130.06719.00
5.4.210.0170.06318.81
5.4.200.0130.07019.06
5.4.190.0100.06719.23
5.4.180.0070.06718.98
5.4.170.0070.07018.94
5.4.160.0070.07018.97
5.4.150.0200.06318.94
5.4.140.0030.06016.34
5.4.130.0100.03716.30
5.4.120.0100.04016.18
5.4.110.0070.07316.18
5.4.100.0130.06716.44
5.4.90.0000.07316.52
5.4.80.0030.06716.37
5.4.70.0070.03316.27
5.4.60.0100.03016.25
5.4.50.0100.07316.25
5.4.40.0000.07316.44
5.4.30.0070.07316.49
5.4.20.0130.03316.24
5.4.10.0000.05316.14
5.4.00.0070.06015.62
5.3.290.0070.05014.62
5.3.280.0070.03714.56
5.3.270.0030.07314.40
5.3.260.0030.07014.53
5.3.250.0100.07014.59
5.3.240.0130.06714.55
5.3.230.0030.07014.38
5.3.220.0000.08314.55
5.3.210.0100.06714.53
5.3.200.0070.05314.57
5.3.190.0130.07014.55
5.3.180.0030.06714.57
5.3.170.0000.04314.65
5.3.160.0100.04714.58
5.3.150.0000.06714.42
5.3.140.0070.05714.49
5.3.130.0100.07314.48
5.3.120.0070.04714.50
5.3.110.0030.08314.39
5.3.100.0100.04013.89
5.3.90.0030.04013.95
5.3.80.0030.08314.10
5.3.70.0030.08013.98
5.3.60.0070.05313.98
5.3.50.0070.04313.94
5.3.40.0100.06313.92
5.3.30.0000.06713.70
5.3.20.0070.07313.66
5.3.10.0100.06313.65
5.3.00.0130.07013.58
5.2.170.0100.06011.10
5.2.160.0070.06011.15
5.2.150.0000.05711.19
5.2.140.0100.06011.12
5.2.130.0030.06011.11
5.2.120.0030.06711.26
5.2.110.0000.06311.11
5.2.100.0030.05311.12
5.2.90.0170.05310.90
5.2.80.0130.05311.00
5.2.70.0070.05711.25
5.2.60.0070.06311.04
5.2.50.0030.04711.01
5.2.40.0100.05710.84
5.2.30.0070.05310.92
5.2.20.0100.04310.98
5.2.10.0100.05310.92
5.2.00.0100.05310.58
5.1.60.0070.04010.07
5.1.50.0030.0539.97
5.1.40.0000.0539.82
5.1.30.0070.05710.39
5.1.20.0000.03010.41
5.1.10.0030.05710.07
5.1.00.0030.05710.15
5.0.50.0030.0408.62
5.0.40.0070.0308.40
5.0.30.0030.0638.22
5.0.20.0030.0478.15
5.0.10.0030.0438.25
5.0.00.0000.0678.21
4.4.90.0030.0377.74
4.4.80.0000.0337.74
4.4.70.0100.0107.74
4.4.60.0000.0377.74
4.4.50.0030.0237.74
4.4.40.0000.0537.74
4.4.30.0000.0377.74
4.4.20.0000.0407.74
4.4.10.0000.0237.74
4.4.00.0000.0407.74
4.3.110.0030.0337.74
4.3.100.0030.0277.74
4.3.90.0000.0407.74
4.3.80.0000.0477.74
4.3.70.0070.0307.74
4.3.60.0000.0377.74
4.3.50.0000.0237.74
4.3.40.0030.0507.74
4.3.30.0000.0407.74
4.3.20.0000.0377.74
4.3.10.0030.0237.74
4.3.00.0030.0337.74

preferences:
39.96 ms | 401 KiB | 5 Q