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@ 2017-06-25T12:22:29Z

<?php

$a = 121;
$b = (string)$a;
$c = str_split($b);
for ($b=0; $b<=count($c);++$b){
    $d=array_sum($c);
}

echo $d;

Output
Performance
VLD
References
Branches

array_sum: documentation ( source)
str_split: documentation ( source)

preferences:dark modelive preview

52.98 ms | 402 KiB | 5 Q