3v4l.org

run code in 300+ PHP versions simultaneously
<?php $txt = "kkklla"; $char = count_chars($txt, 1); arsort($char); $chars = []; foreach ($char as $key => $val) { echo chr($key)= $value; } var_dump($chars);

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)
7.1.70.0100.01015.05
7.1.60.0230.01333.20
7.1.50.0200.01332.93
7.1.40.3330.01032.59
7.1.30.4570.01732.74
7.1.20.3870.02032.82
7.1.10.2670.01014.41
7.1.00.1770.01314.79
7.0.200.0100.00714.66
7.0.190.4800.00714.68
7.0.180.6100.01314.03
7.0.170.3730.00714.48
7.0.160.3330.01014.43
7.0.150.2000.00314.21
7.0.140.1730.00714.38
7.0.130.1500.02014.39
7.0.120.1570.01314.37
7.0.110.1700.01014.22
7.0.100.2530.00314.50
7.0.90.2300.01314.30
7.0.80.2300.01314.25
7.0.70.1630.01014.18
7.0.60.2200.01013.99
7.0.50.1800.01714.24
7.0.40.1730.00714.60
7.0.30.1670.01014.63
7.0.20.2470.00714.30
7.0.10.2230.01014.59
7.0.00.2300.01314.32

preferences:
139.84 ms | 1386 KiB | 7 Q