Sub-string without counting blank spaces

Question

I want to make a sub-string, where the $count only counts letters, not spaces. This is what I have so far:

$string =\"vikas tyagi php\";
$strin         


        

Answer 1

$arr = explode(" ",$str);
$length = 10;
for ($i = 0, $currIndex = 0, $finalstring = ""; $currIndex < $length; $i++){
    $finalstring .= " ".substr($arr[$i], 0, $length - $currIndex);
    $currIndex += strlen($arr[$i]);
}

Here is a demonstration: http://codepad.org/lv4KEsAi