Question

我从第三方获取json文件，其中包含可变深度的键：值对，类似于： ***编辑JSON以澄清将在mysql db中使用的表名。 KEY是表中的列，值是数据。列名称将是从json到json的静态。

   {                         
   "Key1": "Value1",  //non-nested key:value go to default table                     
   "Key2": "Value2",                      
   "Key3": "Value3",                                 
   "Table1": [],                      
   "Table2": [{                      
        "Key1": "Value1",                  
        "Key2": "Value2",                  
        "Key3": "Value3"},

        {"Key1": "Value1",                  
         "Key2": "Value2",                  
         "Key3": "Value3"}],

    "Table3": [
          {"Key1": "Value1",                  
            "Key2": "Value2",                  
            "Key3": "Value3"},
             {"Table4": [
                   {"Key1": "Value1",              
                    "Key2": "Value2",              
                    "Key3": "Value3"},
                {"Table5": [
                           {"Key1": "Value1",          
                            "Key2": "Value2",          
                            "Key3": "Value3"}]
                 }]
           }]    
     }

**此示例传递JSON验证

对于初始密钥：值对（不在嵌套数组中）我需要设置一个表名，将所有非嵌套值插入表中。对于嵌套的Key：Value对，需要将tablename设置为Array键，即Array1，Array2，Array3等，其中嵌套的Key是列名，Value是数据。

我一直在尝试使用RecursiveIteratorIterator来重申数组（我理解这对于数组的嵌套foreach处理有一些速度优势），但无论哪种方式..我在分离嵌套数组和拔出底层数据时遇到问题键：值

我正在尝试这个：

$iterator = new RecursiveIteratorIterator(
    new RecursiveArrayIterator($data1),
    RecursiveIteratorIterator::SELF_FIRST
);
foreach ($iterator as $key=>$value){
        if (!is_array($value)){
        //echo $key." KEY is not an array <br>";
        }

        if(is_array($value)){
            //echo $key." KEY is an array <br>";
                foreach($value as $key1=>$val1){
                    if (is_array($val1)){
                    //echo $key1."KEY 1 is an array<br>";  
                }
            }    
        }
    }

更新

用户@olibiaz提出了几乎100％正确的解决方案：

function toto(array $input, $tableName = '')
{
    foreach ($input as $key => $element) {
      if (is_array($element)) {
         toto($element, $key);
      } else {
          if ($tableName === '') {
             // here is the non nested elelement,
             // you can choose the tableName you want
             $tableName = 'NonNestedTableName';
          }
          // place your insert here or whatever you want
          // here, the tablename is the index of the nested array
          echo "TableName: $tableName, Key: $key, Data: $element \n";
      }
    }
}

以下是我在JSON数据上运行上述代码时得到的输出：

TableName: project, Key: Key1, Data: Value1 // "project" used for non-nested
TableName: project, Key: Key2, Data: Value2 
TableName: project, Key: Key3, Data: Value3
TableName: 0, Key: Key1, Data: Value1  // Tablename needs to be "Array2"
TableName: 0, Key: Key2, Data: Value2  // for these 3 data sets
TableName: 0, Key: Key3, Data: Value3 
TableName: 1, Key: Key1, Data: Value1  // Tablename needs to be "Array2"
TableName: 1, Key: Key2, Data: Value2 
TableName: 1, Key: Key3, Data: Value3 
TableName: 0, Key: Key1, Data: Value1  // Tablename needs to be "Array3"
TableName: 0, Key: Key2, Data: Value2 
TableName: 0, Key: Key3, Data: Value3  
TableName: 0, Key: Key1, Data: Value1  // Tablename needs to be "Array4"
TableName: 0, Key: Key2, Data: Value2 
TableName: 0, Key: Key3, Data: Value3 
TableName: 0, Key: Key1, Data: Value1  // Tablename needs to be "Array5"
TableName: 0, Key: Key2, Data: Value2 
TableName: 0, Key: Key3, Data: Value3

但是，我不需要使用表名的数字索引，而是需要使用数组的键名。也许olibiaz或其他用户有关于如何实现这一目标的建议？

Answer 1

在所有评论和交流之后编辑。我会以你的例子来更精确地

<?php

$inputJson = '{                         
   "Key1": "Value1",                      
   "Key2": "Value2",                      
   "Key3": "Value3",                                 
   "Table1": [],                      
   "Table2": [{                      
      "Key1": "Value1",                  
      "Key2": "Value2",                  
      "Key3": "Value3"},
     {
        "Key1": "Value1",                  
        "Key2": "Value2",                  
        "Key3": "Value3"}],
   "Table3": [{
        "Key1": "Value1",                  
        "Key2": "Value2",                  
        "Key3": "Value3"},
         {
           "Table4": [{
              "Key1": "Value1",              
              "Key2": "Value2",              
              "Key3": "Value3"},
           {
              "Table5": [{
                 "Key1": "Value1",          
                 "Key2": "Value2",          
                 "Key3": "Value3"}]
             }]
       }]    
 }';

所以输入和你一样，那么这里是递归函数

function toto(array $input, $tableName = '')
{
    foreach ($input as $key => $element) {
        if (is_array($element)) {
            // if key is integer its the first level of array so we keep the $tablename - edited part
            $key = is_int($key) ? $tableName : $key;
            toto($element, $key);
        } else {
            if ($tableName === '') {
                $tableName = 'NonNestedTableName';
            }
            echo "TableName: $tableName, Key: $key, Data: $element \n";
        }
    }
}

$inputArray = json_decode($inputJson, true);

toto($inputArray);

这将显示

TableName：NonNestedTableName，Key：Key1，Data：Value1

TableName：NonNestedTableName，Key：Key2，Data：Value2

TableName：NonNestedTableName，Key：Key3，Data：Value3

TableName：Table2，Key：Key1，Data：Value1

TableName：Table2，Key：Key2，Data：Value2

TableName：Table2，Key：Key3，Data：Value3

TableName：Table2，Key：Key1，Data：Value1

TableName：Table2，Key：Key2，Data：Value2

TableName：Table2，Key：Key3，Data：Value3

TableName：Table3，Key：Key1，Data：Value1

TableName：Table3，Key：Key2，Data：Value2

TableName：Table3，Key：Key3，Data：Value3

TableName：Table4，Key：Key1，Data：Value1

TableName：Table4，Key：Key2，Data：Value2

TableName：Table4，Key：Key3，Data：Value3

TableName：Table5，Key：Key1，Data：Value1

TableName：Table5，Key：Key2，Data：Value2

TableName：Table5，Key：Key3，Data：Value3

Answer 2

也许您可以尝试json_decode将JSON字符串转换为数组。它确实照顾了嵌套级别。

试一试：http://php.net/manual/en/function.json-decode.php

解析未知深度

2 个答案: