如何将JSON数据隐藏到数组中以绘制图表？

Question

I've a php query which creates the JSON data of the the data received from the SQL query that is run. The JSON data is created using this query using this query

echo json_encode($res->fetch_all(MYSQLI_ASSOC), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT );

Now I want to plot a chart using fusionchart for which I need to convert this data into an array. I tried a sample JS code to convert the JSON data into an JS array and it worked

var data = { "timestamp": "2016-09-23", "value1": "0", "value2": "0", ........., "value49": "0", "value50": "0" };
   var arr = [];
   for (elem in data) {
        arr.push(data[elem]);
    }
    console.log(arr);

Now in the data variable I need to pass the data from php code. This is just one of the records that I entered manually. There are over a million records and I need to convert all of them. How I do this?

Answer 1

You can just use Object.values() function to acquire values from an object.

 var data = { "timestamp": "2016-09-23", "value1": "0", "value2": "0", "value49": "0", "value50": "0" }; var arr = Object.values(data); console.log(arr); 

For PHP

You can send only values and omit keys in PHP using following code. json_decode converts JSON string to an array. implode converts an array to a string.

<?php

$str = '{ "timestamp": "2016-09-23", "value1": "val1", 
        "value2": "val2", "value49": "val49", "value50": "val50" }';
$myJSON = json_decode($str, true);

echo '[' . implode(",", $myJSON) . ']';

Results:

[2016-09-23,val1,val2,val49,val50]

Answer 2

You can use parseJSON() function :

var obj = jQuery.parseJSON( '{ "name": "John" }' );
alert( obj.name === "John" );