3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar = null; $nullstr = ''; $notnull = 'foo'; $unset = 'something'; unset($unset); function quiet_dump($v) { ob_start(); echo '<pre>'; var_dump($v) echo '</pre>'; return ob_get_clean(); } $results = array( '<h1>Results</h1>' , '<br/>$nullvar = ' , quiet_dump(isset($nullvar), true) , '<br/> $nullstr = ' , quiet_dump(isset($nullstr), true) , '<br/>$notnull = ' , quiet_dump(isset($notnull), true) , '<br/>$unset = ' , quiet_dump(isset($unset), true) ); echo impode(' ',$results);

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)
5.4.190.0210.04312.39
5.4.180.0250.09812.40
5.4.170.0170.04212.41
5.4.160.0150.04712.40
5.4.150.0130.04812.40
5.4.140.0220.03712.09
5.4.130.0240.03612.07
5.4.120.0260.06112.04
5.4.110.0160.04212.03
5.4.100.0190.03912.03
5.4.90.0160.04412.03
5.4.80.0130.04812.03
5.4.70.0150.04212.02
5.4.60.0110.04612.03
5.4.50.0200.04012.02
5.4.40.0130.07312.01
5.4.30.0150.04212.01
5.4.20.0150.04112.01
5.4.10.0270.09012.01
5.4.00.0130.04311.50
5.3.270.0120.04812.72
5.3.260.0180.04212.72
5.3.250.0150.04412.72
5.3.240.0140.04512.71
5.3.230.0180.04412.71
5.3.220.0260.06412.68
5.3.210.0180.04212.68
5.3.200.0140.04612.68
5.3.190.0130.04812.68
5.3.180.0200.04312.67
5.3.170.0180.04512.67
5.3.160.0230.04112.68
5.3.150.0180.04312.67
5.3.140.0380.08212.66
5.3.130.0200.04212.66
5.3.120.0190.04312.66
5.3.110.0160.04612.66
5.3.100.0150.07712.12
5.3.90.0140.04612.10
5.3.80.0190.04212.09
5.3.70.0160.04712.09
5.3.60.0160.04712.07
5.3.50.0180.04112.02
5.3.40.0170.04412.02
5.3.30.0160.04412.00
5.3.20.0180.04511.77
5.3.10.0180.04811.72
5.3.00.0330.09611.71

preferences:
137.14 ms | 1398 KiB | 7 Q