Question

我正在使用jQuery DataTables。我有这个代码正常工作：

$res = $this->connection->prepare("....");

$res->bindParam(1,$id);
$res->execute();
$result = $res->fetchAll(PDO::FETCH_ASSOC);

$data = array(
   'data'=>$result
);

return json_encode($data);

这就是结果如何。

{“data”：[{“id”：“10”，“time_in”：“2015-07-06 07:30:00”，“time_out”：“2015-07-06 10:26:11 “ ，“出席”：“是”}，{“id”：“9”，“time_in”：“2015-07-06 08:00:00”，“time_out”：“2015-07-06 11点46" 分36秒， “参加”： “是”}]}

但是我希望我的id填充为零，如下所示。

{“data”：[{“id”：“00010”，“time_in”：“2015-07-06 07:30:00”，“time_out”：“2015-07-06 10:26:11 “ ，“出席”：“是”}，{“id”：“00009”，“time_in”：“2015-07-06 08:00:00”，“time_out”：“2015-07-06 11点46" 分36秒， “参加”： “是”}]}

我怎样才能做到这一点这样我可以输出这样的结果，我可以在数据表中显示它吗？

Answer 1

我更喜欢干净的SQL方法，但你有PHP标签;所以我无法抗拒。

$res = $this->connection->prepare("....");

$res->bindParam(1, $id);
$res->execute();
$result = $res->fetchAll(PDO::FETCH_ASSOC);

foreach ($result as $row):
    $row['id'] = sprintf('%05d', $row['id']);
endforeach;

$data = array(
    'data' => $result
);

return json_encode($data);

Answer 2

<强>的MySQL

在MySQL中，您可以使用LPAD()。

例如，要使用0到5个字符填充字段id，请使用以下语句。

SELECT LPAD(id,5,'0') AS id FROM table;

<强>的PostgreSQL

在PostgreSQL中，您可以使用LPAD()。如果id是整数，则需要将其类型化为字符串。

例如，要使用0到5个字符填充字段id，请使用以下语句。

SELECT LPAD(id::text,5,'0') AS id FROM table;

Answer 3

尝试这个SQL语句，它将解决您的问题：

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在服务器端使用零填充数据

3 个答案: