list($usec, $sec) = explode(" ", microtime());
$usec = substr(str_replace('0.', '', $usec), 0 ,4);
$str = rand(10,99);
print_r(date("YmdHis").$usec.$str);
PHP生成订单号代码
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转载自blog.csdn.net/wkissa/article/details/79345629
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