Question

我有这个代码在表上进行查询，然后在另一个插入中插入一个具有随机整数值的字段，但是当我有很多记录时它会重复。

代码：

$d = connection::select(select * from tabela1);

    foreach ($d as $reg) {

        $c1 = $reg['c1'];
        $c2 = $reg['c2'];
        $c3 = $reg['c3'];

        $count = count($reg);

        $numbers = range(1, $count- 1);
        srand((float) microtime() * 10000000);
        shuffle($numbers);
        foreach ($numbers as $number) {

        }

        connection::exec("insert into table2 (c1,c2,c3,seq)values('$c1','$c2','$c3',$number)");
}

Answer 1

您应该在主foreach循环之外创建随机数组。然后只为每个插入使用数组的一个元素。这样你就不会得到任何副本。

$d = connection::select("select * from tabela1");
$rows = $d->fetchAll();
$count = count($rows);
$numbers = range(1, $count);
srand((float) microtime() * 10000000);
shuffle($numbers);
foreach ($rows as $i => $reg) {
    $number = $numbers[$i];
    $c1 = $reg['c1'];
    $c2 = $reg['c2'];
    $c3 = $reg['c3'];
    connection::exec("insert into table2 (c1,c2,c3,seq)values('$c1','$c2','$c3',$number)");
}

数组shuffle重复值

1 个答案: