我正在努力尝试从我的数据库创建一个三维数组，并将其编码为 JSON。
我的数据库包含 3 个表，timeline_table、content_table 和 pic_table。我的 JSON 需要以下结构：
{"timeline:"{"content":{"pictures:"{}}}}
这是我当前的 PHP 代码：
$get = 1;
$results = mysql_query("
SELECT timeline_table.*, content_table.*, pic_table.*
FROM timeline_table
JOIN content_table
ON content_table.tl_ID = timeline_table.tl_ID
JOIN pic_table
ON pic_table.content_ID = content_table.content_ID
WHERE timeline_table.tl_ID = $get
") or die(mysql_error());
while($row = mysql_fetch_assoc($results)){
$timeline['timeline'][] = array(
'tl_ID' => $row['tl_ID'],
'tl_name' => $row['tl_name'],
'tl_date' => $row['tl_date'],
'tl_desc' => $row['tl_desc'],
);
$timeline['timeline']['content'][] = array(
'content_ID' => $row['content_ID'],
'tl_ID' => $row['tl_ID'],
'content_time' => $row['content_time'],
'content_date' => $row['content_date'],
'content_title' => $row['content_title'],
'content_content' => $row['content_content'],
'content_category' => $row['content_category'],
'content_mapLat' => $row['content_mapLat'],
'content_mapLng' => $row['content_mapLng'],
'content_zoomLvl' => $row['content_zoomLvl'],
);
$timeline['timeline']['content']['pictures'][] = array(
'pic_ID' => $row['pic_ID'],
'content_ID' => $row['content_ID'],
'pic_path' => $row['pic_path'],
'pic_desc' => $row['pic_desc'],
'pic_link' => $row['pic_link']
);
}
echo stripslashes(json_encode($timeline));
}
我还尝试对每个表使用 1 个查询，并使用 3 个 while 循环来填充数组。我相信一个查询是更好的方法，但如果我错了，请纠正我。这个 php 给了我以下 JSON：
{
"timeline":{
"0":{
"tl_ID":"1",
"tl_name":"Tidslinje 1",
"tl_date":"2013-01-16",
"tl_desc":"Test av tl_table"
},
"content":{
"0":{
"content_ID":"1",
"tl_ID":"1",
"content_time":"16:00:00",
"content_date":"2013-01-17",
"content_title":"Test",
"content_content":"Test content number one.",
"content_category":"test",
"content_mapLat":null,
"content_mapLng":null,
"content_zoomLvl":null
},
"pictures":[
{
"pic_ID":"1",
"content_ID":"1",
"pic_path":"http://i.imgur.com/F6RmDFt.jpg",
"pic_desc":"katt",
"pic_link":"http://i.imgur.com/F6RmDFt.jpg"
},
{
"pic_ID":"3",
"content_ID":"3",
"pic_path":"http://i.imgur.com/POum7eK.jpg",
"pic_desc":"seamonster",
"pic_link":"http://i.imgur.com/POum7eK.jpg"
}
]
}
}
}
无论 content_ID 如何，所有图片都在一个数组中，如果我添加更多内容，则 ID 为 2,3 等的内容将位于图片数组下。我想要它们所属的 content_ID 下的数组中的图片，以及它们所属的时间轴下的内容。我还希望数组键是“时间轴”、“内容”和“图片”，而不是整数。
希望这是可以理解的，非常感谢任何帮助！
编辑：解决了！
$get = 1;
$result = mysql_query("
SELECT t.tl_ID, t.tl_name, t.tl_date, t.tl_desc, c.content_ID, c.content_time, c.content_date, c.content_title, c.content_content, c.content_category, p.pic_ID, p.pic_path, p.pic_desc, p.pic_link
FROM timeline_table t
LEFT JOIN content_table c ON t.tl_ID = c.tl_ID
LEFT JOIN pic_table p ON c.content_ID = p.content_ID
WHERE t.tl_ID = $get
ORDER BY t.tl_ID, c.tl_ID, p.content_ID
") or die(mysql_error());
$jsonData = array();
$tl_ID = 0;
$content_ID = 0;
$timelineIndex = -1;
$contentIndex = -1;
while($row = mysql_fetch_assoc($result)){
if($tl_ID != $row['tl_ID']){
$timelineIndex++;
$contentIndex = -1;
$tl_ID = $row['tl_ID'];
$jsonData[$timelineIndex]['tl_ID'] = $row['tl_ID'];
$jsonData[$timelineIndex]['tl_name'] = $row['tl_name'];
$jsonData[$timelineIndex]['tl_date'] = $row['tl_date'];
$jsonData[$timelineIndex]['tl_desc'] = $row['tl_desc'];
$jsonData[$timelineIndex]['content'] = array();
}
if($content_ID != $row['content_ID']){
$contentIndex++;
$content_ID = $row['content_ID'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_ID'] = $row['content_ID'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_time'] = $row['content_time'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_date'] = $row['content_date'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_title'] = $row['content_title'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_content'] = $row['content_content'];
$jsonData[$timelineIndex]['content'][$contentIndex]['content_category'] = $row['content_category'];
$jsonData[$timelineIndex]['content'][$contentIndex]['pictures'] = array();
}
$jsonData[$timelineIndex]['content'][$contentIndex]['pictures'][] = array(
'pic_ID' => $row['pic_ID'],
'pic_path' => $row['pic_path'],
'pic_desc' => $row['pic_desc'],
'pic_link' => $row['pic_link']
);
}
echo stripslashes(json_encode($jsonData));
}