订单编号自增补零

'ARB'.date('ymd').str_pad($last[0]['orderby'] + 1,4,"0",STR_PAD_LEFT),

例子:

$num=128;
$num=str_pad($num,4,"0",STR_PAD_LEFT); echo $num;

输出

0128
 

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转载自www.cnblogs.com/ZxyPhppython/p/9224447.html