How to make IF statement in Javascript based on the json result in PHP

Question

Well, sorry for my bad grammar, but any help will be much appreciated..

Ok, here I'm trying to encode string by using json inside PHP then using JavaScript to read the json string. It will have 2 cases here. The first one is, the application will running normally, so does the encode. The json string will be like this :

{"employee":
[{"id":"1","firstName":"aaa","lastName":"abc","timeIn":"08:00:00","timeOut":"17:00:00"},
{"id":"2","firstName":"bbb","lastName":"def","timeIn":"08:00:00","timeOut":"16:45:00"}]}

and the second one is, the PHP can't read the MySQL database, so in PHP the json encode will be like this :

{"errorProcess":{"text":SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it. }}

The question is, in JavaScript how can I make an IF statement in JavaScript based on the result string in json? Maybe it will be like this, but I don't know how to write it in JavaScript.

IF (in json string has employee){then result}
else if(in json string has errorProcess){then result}

Thanks for your help

How are you parsing json in javascript? You need to turn it into a javascript object first — James Black
– James Black, Commented Dec 28, 2013 at 20:20

nilobarp · Accepted Answer · 2013-12-28 20:21:34Z

3

You can check for errorProcess key using

if(json.hasOwnProperty('errorProcess')){
   //do struff
}

answered Dec 28, 2013 at 20:21

nilobarp

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1 Comment

kero Over a year ago

I was gonna write an answer with typeof json.errorProcess != 'undefined' but this seems way more elegant

danasilver · Accepted Answer · 2013-12-28 20:28:41Z

1

JSON keys and values are accessed using dot (.) notation in Javascript. Assuming you already have the JSON as an object (not a string), you can simply write

if (json.employee) {
  // do something
}
else if (json.error) {
  // do something else
}

where json is a variable referencing your returned JSON from the php.

If your JSON is still in string format, you need to parse it into an object. This can be done with the built in JSON object.

var json = JSON.parse(jsonAsString);

answered Dec 28, 2013 at 20:28

danasilver

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Comments

Noor · Accepted Answer · 2013-12-28 20:34:06Z

1

First you need to parese JSON like this

var jsonObject= jQuery.parseJSON(yourJsonObj);

if(jsonObject.hasOwnProperty('employee')){
// Add your code

}else if(jsonObject.hasOwnProperty('errorProcess')){
// Add your code
}

answered Dec 28, 2013 at 20:34

Noor

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