需要帮助弄清楚我在哪里出错了。
我从PDO fetchAll（PDO :: FETCH_ASSOC）
获得此结果$sql->execute();
$result = $sql->fetchAll(PDO::FETCH_ASSOC);
得到这个
Array
(
[0] => Array
(
[father] => 1
[child] => 1
[timeOfchild] => 2
)
[1] => Array
(
[father] => 1
[child] => 1
[grandChild] => 2
)
[2] => Array
(
[father] => 1
[child] => 1
[grandChild] => 4
)
[3] => Array
(
[father] => 1
[child] => 1
[grandChild] => 3
)
[4] => Array
(
[father] => 1
[child] => 2
[grandChild] => 2
)
[5] => Array
(
[father] => 1
[child] => 2
[grandChild] => 3
)
[6] => Array
(
[father] => 1
[child] => 2
[grandChild] => 4
)
[7] => Array
(
[father] => 2
[child] => 1
[grandChild] => 4
)
[8] => Array
(
[father] => 2
[child] => 1
[grandChild] => 3
)
[9] => Array
(
[father] => 2
[child] => 1
[grandChild] => 2
)
[10] => Array
(
[father] => 2
[child] => 2
[grandChild] => 2
)
[11] => Array
(
[father] => 2
[child] => 2
[grandChild] => 3
)
[12] => Array
(
[father] => 2
[child] => 2
[grandChild] => 4
)
)
现在要进行分组我使用foreach循环
$family = array();
// Loop JSON objects
foreach($result as $object) {
$father_key = $object['father'];
$child_key = $object['child'];
$grandChild_key = $object['grandChild'];
$children = 'children';
if(!array_key_exists($father_key, $family)) {
$fatherObject = array();
$fatherObject['title'] = 'Father' .$father_key;
$fatherObject['key'] = $father_key;
$fatherObject['children'] = array();
// Save this new object
$family[$father_key] = $fatherObject;
}
$week_children = $family[$father_key][$children];
if(!array_key_exists($child_key, $week_children)) {
$childObject = array();
$childObject['title'] = 'Child' .$child_key;
$childObject['key'] = $child_key;
$childObject['children'] = array();
// Save this new object
$family[$father_key]['children'][$child_key] = $childObject;
}
if(isset($family[$father_key][$children][$child_key][$children])){
$day_children = $family[$father_key][$children][$child_key][$children];
if(!array_key_exists($grandChild_key, $day_children)) {
$grandChildObject = array();
$grandChildObject['title'] = 'GrandChild' .$grandChild_key;
$grandChildObject['key'] = $grandChild_key;
// Save this new object
$family[$father_key][$children][$child_key]['children'][$grandChild_key] = $grandChildObject;
}
}
}
echo json_encode($family);
预期应采用以下形式：
[
{"title": "Father 1", "key": "1", "children": [
{"title": "child 1", "key" : "1", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
{"title": "child 2", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
{"title": "child 3", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
]},
{"title": "Father 2", "key": "1", "children": [
{"title": "child 1", "key" : "1", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
{"title": "child 2", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
{"title": "child 3", "children" : [
{"title" : "grandchild 1" , "key" : "key 1" },
{"title" : "grandchild 2" , "key" : "key 2" }
]},
]}
];
但是当我将JSON_encode（$ family）作为PHP文件的输出时，我得到了一些东西。
{
"1":{
"title":"Father 1",
"key":"1",
"children":{
"1":{
"title":"Child 1",
"key":"1",
"children":{
"1":{
"title":"GrandChild 1",
"key":"1"
},
"2":{
"title":"GrandChild 2",
"key":"2"
}
}
},
"2":{
"title":"Child 2",
"key":"2",
"children":{
"1":{
"title":"GrandChild 1",
"key":"1"
},
"2":{
"title":"GrandChild 2",
"key":"2"
}
}
}
}
},
"2":{
"title":"Father 2",
"key":"2",
"children":{
"1":{
"title":"Child 2",
"key":"1",
"children":{
"1":{
"title":"GrandChild 1",
"key":"2"
},
"2":{
"title":"GrandChild 2",
"key":"3"
}
}
},
"2":{
"title":"Child 2",
"key":"2",
"children":{
"1":{
"title":"GrandChild 1",
................
};
答案 0 :(得分：1)
我不完全理解你的剧本/意图，但我觉得你设置的时候 孩子们反对你想写的东西：
// Save this new object
$family[$father_key]['children'][$child_key] = $childObject;
而不是
// Save this new object
$family[$father_key]['children'][] = $childObject;
答案 1 :(得分：0)
我最终选择了该解决方案，因为我在使用JS时遇到了问题。
$family = array();
// Loop JSON objects
foreach($result as $object) {
$father_key = $object["father"];
$child = $object["child"];
$grandchild = $object["grandChild"];
$children = "children";
if (!multi_in_array($father, $family) ) {
$fatherObject = array();
$fatherObject["title"] = "father " .$father;
$fatherObject["key"] = $father;
$fatherObject["children"] = array();
$family[] = $fatherObject;
}
}
foreach($result as $object) {
$father = $object["father"];
$child = $object["child"];
$grandchild = $object["grandChild"];
$children = "children";
foreach($family as $index => $value){
$myFather = $value["key"];
$childrens = $value[$children];
if($father === $myFather){
if (!multi_in_array($child, $childrens) ) {
$childObject = array();
$childObject["title"] = "child " .$child;
$childObject["key"] = $child;
$childObject["children"] = array();
// Save this new object
$family[$index]["children"][] = $childObject;
}
}
}
}
foreach($result as $object) {
$father = $object["father"];
$child = $object["child"];
$grandchild = $object["grandChild"];
$children = "children";
foreach($family as $index => $value){
$myFather = $value["key"];
$childrens = $value[$children];
foreach($childrens as $childIndex => $childValues){
$myChild = $childValues["key"];
$child_childrens = $childValues[$children];
if($father === $myFather && $child === $myChild){
if (!multi_in_array($grandchild, $child_childrens) ) {
$grandChildObject = array();
$grandChildObject['title'] = 'grandChild ' .$grandchild;
$grandChildObject['key'] = $grandchild;
// Save this new object
$family[$index][$children][$childIndex]['children'][] = $grandChildObject;
}
}
}
}
}
使用前面的解决方案，数组键不是以0开头，而是我会[1] =＆gt; ......和[2] =＆gt; ...当我的js代码试图解释数组时，最终产生错误。我试图使用array_values重新映射数组并让所有数组键从0开始，但这个函数不是递归的，只会执行第一级。因此，除非有人能指出如何重新映射最终数组以使所有数字键从零开始，否则我会这样做。