26进制（字母）转十进制算法

function litterToNumber($lineTag)
{
    $transfArray =  array(‘A‘=>1,‘B‘=>2,‘C‘=>3, ‘D‘=>4, ‘E‘=>5,    ‘F‘=>6, ‘G‘=>7, ‘H‘=>8, ‘I‘=>9, ‘G‘=>10, ‘K‘=>11, ‘L‘=>12,‘
M‘=>13, ‘N‘=>14, ‘O‘=>15, ‘P‘=>16, ‘Q‘=>17, ‘R‘=>18, ‘S‘=>19, ‘T‘=>20, ‘U‘=>21,‘V‘=>22,‘W‘=>23,‘X‘=>24,‘Y‘=>25,‘Z‘=>26);
    
    $len = strlen($lineTag);
    for($i = $len-1; $i >= 0; $i --)
    {
        $value += $transfArray[$temp[$i]]*pow(26,$len-1-$i); 
    }
}