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@ 2015-03-04T11:45:18Z

<?php

function makePalindrome($word){
    
    $result = 0;

    $chars = str_split($word);
    
    foreach($chars as $index => $char){
        
        $ascii = ord($char);
        
        if(!(($ascii>=97 && $index==0) || ($ascii<=122 && $index == count($chars)))){
            
            $result+=$ascii-97+1;
            
        }
    }
    
    return $result;
}

$test='abcde';
echo makePalindrome($test);

Output
Performance
VLD
References
Branches

str_split: documentation ( source)
ord: documentation ( source)

preferences:dark modelive preview

55.86 ms | 402 KiB | 5 Q