3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strlen("list($a,$b)=explode('.',$argv[1]);$f=function($s,$d){$i=0;foreach(str_split($s)as$n){$i++;if($n!=0)$t[]=$d.str_pad($n,$i,'0');}return $t;};echo implode(' + ',array_merge(array_reverse($f(strrev($a),'')),$f($b,'.')));");

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)
7.0.20.0300.08320.18
7.0.10.0030.04320.12
7.0.00.0000.07320.07
5.6.170.0430.07020.54
5.6.160.0100.08020.57
5.6.150.0130.07718.27
5.6.140.0070.04018.28
5.6.130.0030.07018.28
5.6.120.0000.04720.99
5.6.110.0070.08721.12
5.6.100.0330.05720.99
5.6.90.0030.07321.08
5.6.80.0130.07020.38
5.5.310.0200.04720.50
5.5.300.0130.03018.09
5.5.290.0130.04718.07
5.5.280.0030.08320.87
5.5.270.0000.04720.79
5.5.260.0170.06720.86
5.5.250.0130.07020.68
5.5.240.0270.05720.15

preferences:
142.79 ms | 1394 KiB | 7 Q