如何在php中使用嵌套对象和数组创建JSON对象

Question

这就是我希望我的对象看起来像：

{
    "cluster": "testcluster",
    "instance": "i-03f8f8c9e7febab21",
    "instype": "r4.8xlarge",
    "AZ": "us-east-1e",
    "env": "test", 
    "cpus":  "32",
    "memory": "256G",
    "kernel": "4.4.0-96-generic",
    "info": "cpu usage stats",
    "unit": "percent",
    "cpustats": [
          {"metric":"user", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"sys",  "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"idle", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"softirq", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"intr", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"steal", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]},
          {"metric":"user", "values":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]}
   ]
}

如何在php中构建？

Answer 1

对不起男人，但问题解释真的很糟糕!!如果我理解，你想要一个像上面这样的JSON（你的帖子）

  

PHP具有管理JSON对象的特定功能：json_encode和json_decode

使用json_encode

用于将Object转换为JSON字符串

  private void button1_Click_2(object sender, EventArgs e)
        {
            DialogResult dr = this.openFileDialog1.ShowDialog();
            if (dr == System.Windows.Forms.DialogResult.OK)
            {
                // Read the files
                foreach (String file in openFileDialog1.FileNames)
                {
                    // Create a PictureBox.
                    try
                    {
                        Panel panel = new Panel();
                        PictureBox pb = new PictureBox();
                        TextBox tb = new TextBox();
                        Image loadedImage = Image.FromFile(file);
                        pb.Height = 200;
                        pb.Width = 200;
                        pb.Image = loadedImage;
                        pb.SizeMode = PictureBoxSizeMode.StretchImage;
                        tb.Text = openFileDialog1.FileName;
                        //panel.Controls.Add(pb);
                        panel.Controls.Add(tb);
                        panel.Height = 200;
                        panel.Width = 200;
                        flowLayoutPanel1.Controls.Add(panel);

                    }
                    catch (SecurityException ex)
                    {
                        // The user lacks appropriate permissions to read files, discover paths, etc.
                        MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
                            "Error message: " + ex.Message + "\n\n" +
                            "Details (send to Support):\n\n" + ex.StackTrace
                        );
                    }
                    catch (Exception ex)
                    {
                        // Could not load the image - probably related to Windows file system permissions.
                        MessageBox.Show("Cannot display the image: " + file.Substring(file.LastIndexOf('\\'))
                            + ". You may not have permission to read the file, or " +
                            "it may be corrupt.\n\nReported error: " + ex.Message);
                    }


                }
            }

使用json_decode

它用于从JSON字符串中检索原始对象

    private void button2_Click(object sender, EventArgs e)
{

    foreach(TextBox tb in TextBoxes)
    {


        File.Copy(tb.Text, dest);

    }
}

现在尝试创建帖子的JSON字符串=）

我尝试使用你的想法：

我改变了JSON的样子：

<?php
/** You can also use Arrays (Ex. $myArray = array(...)) */
$myObject = new StdClass();

$myObject->newKey = "newValue";
$myObject->otherKey = "otherValue";

$myObject->nestedArrays = array(
    'array1' => array(
        'key1' => 'value1',
        'key2' => 'value2', 
        /** ... OTHER KEY-VALUE ... */
        'keyN' => 'vakyeN'
    ),

    'array2' => array(
        'key1' => 'value1',
        'key2' => 'value2', 
        /** ... OTHER KEY-VALUE ... */
        'keyN' => 'vakyeN'
    )
);

/** ... OTHER CODE ... */

$myJSONString = json_encode($myObject);

print_r($myJSONString);

/** OUTPUT
  * {
  *     "newKey":"newValue",
  *     "otherKey":"otherValue",
  *     "nestedArrays":{
  *         "array1":{
  *             "key1":"value1",
  *             "key2":"value2",
  *             "keyN":"vakyeN"
  *         },
  *         "array2":{
  *             "key1":"value1",
  *             "key2":"value2",
  *             "keyN":"vakyeN"
  *         }
  *     }
  * }
  */

?>

码

<?php

$myObject = json_decode($myJSONString);

?>

输出：

{
    "cluster": "testcluster",
    "instance": "i-03f8f8c9e7febab21",
    "instype": "r4.8xlarge",
    "AZ": "us-east-1e",
    "env": "test", 
    "cpus":  "32",
    "memory": "256G",
    "kernel": "4.4.0-96-generic",
    "info": "cpu usage stats",
    "unit": "percent",
    "cpustats": {
          "user":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891],
          "sys":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891],
          "idle":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891],
          "softirq":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891],
          "intr":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891],
          "steal":[1874,1857,1884,1869,1909,1912,1901,1880,1883,1889,1891]
    }
}