Can't access an element in JSON array

Question

No one really answered this question but how on earth can one use this JSON return data from a php/mysql direct using JavaScript?

Here is the return data once i used JSON.parse and saved it to the Javascript variable obj

[{"stuid":"10-00002","stuname":"Meratis, Velino","stucourse":"Arts","stustat":"0","stulyear":"4","stulog":"feb 16 2017"},{"stuid":"10-00003","stuname":"Melker, Alana","stucourse":"Wilderness","stustat":"1","stulyear":"5","stulog":"feb 16 2017"}]

I've tried the simple obj.stuname but it returns only an undefined i've tried many times to understand it but i can't seem to use this array at all. Could anyone help on this?

I've also tried the reObj = {"stu":obj}; style but then it only returns an [object Object]

so please someone elaborate on this?

how you get from php, share your ajax request code also ?

Niklesh Raut
– Niklesh Raut

2017-02-17 08:25:52 +00:00
Commented Feb 17, 2017 at 8:25 — Niklesh Raut
– Niklesh Raut, Commented Feb 17, 2017 at 8:25

Mihai Alexandru-Ionut · Accepted Answer · 2017-02-17 09:00:14Z

5

obj is a json array, so you have to access an element using its index.

Also, you have to use JSON.parse in order to turn a string of json text to a Javascript object.

Try this:

var stuname=obj[0].stuname;

var obj='[{"stuid":"10-00002","stuname":"Meratis, Velino","stucourse":"Arts","stustat":"0","stulyear":"4","stulog":"feb 16 2017"},{"stuid":"10-00003","stuname":"Melker, Alana","stucourse":"Wilderness","stustat":"1","stulyear":"5","stulog":"feb 16 2017"}]';
var objParsed=JSON.parse(obj);
console.log(objParsed[0].stuname);

If you want to iterate array, use forEach method.

var obj='[{"stuid":"10-00002","stuname":"Meratis, Velino","stucourse":"Arts","stustat":"0","stulyear":"4","stulog":"feb 16 2017"},{"stuid":"10-00003","stuname":"Melker, Alana","stucourse":"Wilderness","stustat":"1","stulyear":"5","stulog":"feb 16 2017"}]';
var objParsed=JSON.parse(obj);
objParsed.forEach(function(item){
  console.log(item.stuname);
});

edited Feb 17, 2017 at 9:00

answered Feb 17, 2017 at 8:20

Mihai Alexandru-Ionut

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3 Comments

Arkonsol Over a year ago

in addition i am using JSON encode from a php and send it via Json to a Javascript but it just says undefined when the data retrieved was perfect

Arkonsol Over a year ago

thanks dude this helped a lot. but how do you use it on a for loop?

Mihai Alexandru-Ionut Over a year ago

You means when I have a JSON string ?

Niklesh Raut · Accepted Answer · 2017-02-17 08:33:47Z

1

If you are getting this response from php via ajax. Be sure to use dataType as json to get json type response not string.
Otherwise you need to parse json data like this
```
obj = JSON.parse(jsonStrFromPhp);
```

Then you can fetch data as obj.stuname or obj[0].stuname depends how you returned from php like this {"stu":obj} or like this [{"stu":obj}]

answered Feb 17, 2017 at 8:33

Niklesh Raut

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1 Comment

Arkonsol Over a year ago

i got the second one. the [{}] from my php. i can't seem to directly parse it coz if i only parse it, it just returns a [object Object],[object Object] so i had to stringify it then parse it afterwards to get my response. but it turned out to solve my problems

Arkonsol · Accepted Answer · 2017-02-17 08:48:17Z

0

while i was having a migraine... of why my code was wrong it turned out that even though the obj = JSON.parse(jsonStrFromPhp); returned only an [object Object],[object Object] javascript can actually understand that shins and returned my variable... how confusing.

answered Feb 17, 2017 at 8:48

Arkonsol

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