如何从 PDO 结果集生成多维数组？

Question

我正在尝试使用 PDO 查询的结果集创建一个数组。

我不确定如何生成我想要的数组结构。

require_once("../resource/Database.php");

$query ="SELECT username FROM users";
$select = $db->prepare($query);
$select->execute(array());  
foreach($select as $rs) :          
    $testing = "array('city'=>".$rs['citynames']"),"

$cities = array(
    echo $testing;
);

我想要这个结果：

$names= array(
    array('name'=>'Los Angeles'),
    array('name'=>'Chicago'),
    array('name'=>'Houston'),
    array('name'=>'Phoenix'),
    array('name'=>'Philadelphia'),
    array('name'=>'San Antonio'),
    array('name'=>'Dallas',),
    array('name'=>'San Diego',),
    array('name'=>'San Jose', ),
    array('name'=>'Detroit', ),
    array('name'=>'San Francisco',),
    array('name'=>'Jacksonville', ),
    array('name'=>'Indianapolis', ),
    array('name'=>'Austin', ),
    array('name'=>'Columbus', ),
    array('name'=>'Fort Worth',),
    array('name'=>'Charlotte', ),
    array('name'=>'Memphis', ),
    array('name'=>'Baltimore', ),
);

Answer 1

想必您正在尝试这样做？

require_once("../resource/Database.php");
$query ="SELECT username FROM users";
$select = $db->prepare($query);
$select->execute(array());
# You may have a snippet of code that you are missing, but incase not,
# you have to fetch the results while() to iterate or your results. I just
# copied your code and focused on the push, not the fact you didn't fetch
while($rs = $select->fetch(PDO::FETCH_ASSOC)) {
    $names[] = array('name'=>$rs['citynames']);
}

这是在此处找到的数组推送 in the manual。如果这不是你的意思，你必须澄清。

Answer 2

您应该指定 sql 查询输出格式：

$query ="SELECT username FROM users";
$select = $db->prepare($query);
$select->execute(array());  
foreach($select->fetchAll(PDO::FETCH_ASSOC) as $rs) {
   $testing[] = array('city' => $rs['citynames']);
}

var_dump($testing);

如何从 PDO 结果集生成多维数组？

How to generate a multi-dimensional array from a PDO resultset?

php

arrays

pdo

resultset

multidimensional-array