<?php // calculate sum of ordinal values of chars // starting from $start until the end of $str function charsum($str, $start) { $sum = 0; for ($i = $start, $max = strlen($str); $i < $max; ++$i) { $sum += ord($str[$i]); } return $sum; } $str = 'hello world'; echo charsum($str, strpos($str, ' '));
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