PHP MYSQL多维数组 [英] PHP MYSQL multidimensional array

问题描述

我很头疼，试图从两个单独的MySQL选择中创建多维数组....我整天都在这里搜索和搜索Google，最终不得不承认失败并寻求帮助(我是也是新手，这无济于事！！！

I'm having major headaches trying to create a multidimensional array from two separate MySQL selects.... I've been searching here and Google all day and have to finally admit defeat and ask for some help (I'm a newbie as well which doesn't help!!!).

我有两个表，一个表每个id包含一行结果，而另一个表可以包含一个id多行.我想做的就是将两者结合成一个多维数组.

I have two tables, one which contains a single row result per id and another which can contain several rows for an id. What I'm trying to do is combine the two into a multidimensional array.

我的代码(可能很差)看起来像这样:

My code (poor as it may be) looks like this:

require 'php/phpConnection.php';

$sqlString1 = mysql_query("SELECT id FROM supportstaff_section1_a");

$firstArray = array();
$secondArray = array();

while ($r = mysql_fetch_assoc($sqlString1)) {
    $applicantID = $r['id'];
    $sqlString2 = mysql_query("SELECT educationalname FROM supportstaff_section5 WHERE id = '$applicantID'");

    while ($x = mysql_fetch_assoc($sqlString2)) {
        $secondArray[] = $x;
    }
    $firstArray[] = $r + $secondArray;
    $secondArray  = array();
}
print json_encode($firstArray);
mysql_close($con);

结果是这样的:

[{"id":"8m8wwy","0":{"educationalname":"GCSE - English"},"1":{"educationalname":"GCSE - Maths"}},{"id":"wiL7Bn"},{"id":"zAw6M1"}]

但是我认为它需要看起来像这样:

But I think it needs to look something like this:

[{"id":"8m8wwy","Array2":"[{"educationalname":"GCSE - English"},{"educationalname":"GCSE - Maths"}]"},{"id":"wiL7Bn"},{"id":"zAw6M1"}]

无论如何，如何为每个ID将我的第二个SQL Select插入我的第一个SQL Select中.

Anyway, how can I insert my second SQL Select into my first SQL Select for each ID.

感谢任何建议/帮助.

编辑

来自W3Schools.com:

Taken from W3Schools.com:

Array
(
    [Griffin] => Array
    (
    [0] => Peter
    [1] => Lois
    [2] => Megan
    )
[Quagmire] => Array
    (
    [0] => Glenn
    )
[Brown] => Array
    (
    [0] => Cleveland
    [1] => Loretta
    [2] => Junior
    )
)

我正在尝试使其像上面一样工作.

I'm trying to make it work like the above.

推荐答案

您需要在此处获得一些创意.类似于以下内容的东西可以与多维数据一起用作联接AND:

You need to get a little creative here. Something like the following would work as a join AND with multi-dimensional data:

<?php
  require 'php/phpConnection.php';

  // ======================================================================
  // Create a join query (way faster than several separate ones!)
  $sqlquery =
    "SELECT SSSA.id, SSS5.educationalname" .
    " FROM supportstaff_section1_a SSSA" .
      " LEFT OUTER JOIN supportstaff_section5 SSS5 ON SSS5.id = SSSA.ID";


  // ======================================================================
  // Run the query and get our results
  $resultarray = array();
  if ($resource = mysql_query($sqlquery)) {
    while ($curarray = mysql_fetch_assoc($resource)) {
      // Create an array, if it doesn't exist
      if (!isset($resultarray[$curarray["id"]]))
        $resultarray[$curarray["id"]] = array();

      // Add to the array, if not null
      $curstring = (string) $curarray["educationalname"];
      if ($curstring != "")
        $resultarray[$curarray["id"]][] = $curstring;
    }
    mysql_free_result($resource);
  }


  // ======================================================================
  // Convert from a keyed array to a standard indexed array (0, 1, 2, etc.)
  $finalarray = array();
  foreach ($resultarray as $id => & $data) {
    // Start with just ID
    $newarray = array(
      "id" => $id
    );

    // Get the data, if we have any
    if (count($data))
      $newarray["educationalnames"] = & $data;

    // Add to our final array and clear the newarray
    $finalarray[] = & $newarray;
    unset($newarray);
  }


  // ======================================================================
  // Get the JSON of our result
  $jsonresult = json_encode($finalarray);


  // ======================================================================
  // Echo it to test
  echo $jsonresult;


  // ======================================================================
  // Close the database
  mysql_close($con);
?>

然后生成的$ jsondata看起来像这样(但当然不是那么破译):

And the resulting $jsondata would look like this (but not so unravelled of course):

[
  {
    "id": "8m8wwy",
    "educationalnames": ["GCSE - English", "GCSE - Maths"]
  },
  {
    "id": "wiL7Bn"
  },
  {
    "id": "zAw6M1"
  }
]

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