[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

returning an element from JSON

Posted on 2013-05-20
2
Medium Priority
?
370 Views
Last Modified: 2013-06-03
Im trying to get just 1 element from a JSON request:-
switch (json_decode($rowNewInput['json'])['type']) { 

Open in new window


The contents of "$rowNewInput['json']" are:-

{
"type" : "combo",
"attribute" : "SQL",
"values" : "Select distinct `First Name` from `staff`;"
}

And all I want is the 'combo' value.

Although I could decode the JSON into a variable and then pull the variable out of the created array, I was hoping to do it all on one line.

However I get an error to saying:-
Parse error: syntax error, unexpected '['

Any suggestions what Im doing wrong?

Thanks in advance.
0
Comment
Question by:tonelm54
2 Comments
 
LVL 111

Accepted Solution

by:
Ray Paseur earned 2000 total points
ID: 39180747
JSON uses object-oriented notation, not array notation.  Try the -> instead of the brackets and quotes.

Also, trying to "do it all on one line" is a fools errand.  That kind of code makes it harder to debug and understand the data structures.  Use as many statements as needed, no less, no more!
http://www.laprbass.com/RAY_temp_tonelm54.php

<?php // RAY_temp_tonelm54.php
error_reporting(E_ALL);

$jso = <<<EOD
{
"type" : "combo",
"attribute" : "SQL",
"values" : "Select distinct `First Name` from `staff`;"
}
EOD;

// DECODE THE STRING INTO AN OBJECT
$obj = json_decode($jso);

// ACTIVATE THIS TO SEE WHAT IS IN THE OBJECT
// var_dump($obj);

// WHAT IS IN THE type PROPERTY
var_dump($obj->type);

Open in new window

Best regards, ~Ray
0
 
LVL 34

Expert Comment

by:Slick812
ID: 39182270
greetings  tonelm54, , not sure about how you "think" about the methods you use in your code, as you have a PHP ['type']  array access for what you have as a javascript object in the javascript object notation string. I have to work in PHP and javascript at the same time to build pages, and often get mixed up in the code syntax for each,
In javascript you are allowed to access OBJECT properties with array methods like - jsobj['type'] - , but in PHP this is not allowed, , I often forget which Object access to use, and put -> in javascript and put a "." in PHP, which causes fatal errors in either one.
If you are used to javascript, you will need to watch your code when changing to PHP code writing, as many things like ['type'] for object access will get you  -
Parse error: syntax error, unexpected '['

and -
switch (json_decode($rowNewInput['json'])->type) {
just might work

but if I forget and use -
switch (json_decode($rowNewInput['json']).type) {
it does Not work.

for your own development error trace, I have found that compound abstraction code like -
switch (json_decode($rowNewInput['json'])->type) {
is harder to debug.

I like this better for debugging -
    $newIn = json_decode($rowNewInput['json']);
    switch ($newIn->type) {
because you can more clearly see what line and method causes the error
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
It’s a season to be thankful, and we’re thankful for users like you who engage on site, solve technology problems, and network with others in the industry. What tech are we most thankful for? Keep reading.
The viewer will learn how to dynamically set the form action using jQuery.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
Suggested Courses
Course of the Month20 days, 3 hours left to enroll

873 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question