EAN13，最后一位的算法
- WBOYOriginal
- 2016-06-07 11:41:461361browse
(偶数位相加*3+奇数位相加）取个位数
如果个位数不等于0,则为（10 - 个位数）
PHP版本：function EAN13($n){<br>
$n=(string)$n;<br>
$a=(($n[1]+$n[3]+$n[5]+$n[7]+$n[9]+$n[11])*3+$n[0]+$n[2]+$n[4]+$n[6]+$n[8]+$n[10])%10;<br>
$a=$a==0?0:10-$a;<br>
return $n.$a;<br>
}JavaScript版本：function EAN13(n){<br>
var n=n.toString();<br>
var a;<br>
a=((n[1]*1+n[3]*1+n[5]*1+n[7]*1+n[9]*1+n[11]*1)*3+n[0]*1+n[2]*1+n[4]*1+n[6]*1+n[8]*1+n[10]*1)%10;<br>
a=a==0?0:10-a;<br>
return n+a;<br>
}
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