How to parse JSON passing in PHP web service

Question

I want to pass a JSON: {"name":"jason","age":"20} in PHP though POST

In RoR, I can get the two values by using params["name"] & params["age"]

But I don't know how to get them in PHP.

I understand that I can 'translate' the JSON string into associative array by using json_decode but I don't know how to get the JSON string.

In my PHP code, I has tried something like this:

<?php
    $json_string = $_POST['params'];

    $json_object= json_decode($json_string);
    print_r($json_object);

    echo $json_object->name;
    echo " ";
    echo $json_object->age;
?>

Then I has tested the PHP with terminal and I got the correct result

curl -d 'params={"name":"jason", "age":"20"}' xxxx/test_json_decode.php

It works but it seems strange to me, because I didn't set the 'Content-Type: application/json'

Is it the correct way to parse JSON in PHP?

the content-type is only useful in certain cases, such as jquery doing a standard .post where you haven't explicitly told it to expect a json response. a json string is just text, and the content-type is just a clue to the receiver. but you could still send a json string with image/jpeg and still decode it and get a native structure again. — Marc B
– Marc B, Commented Nov 3, 2012 at 21:21
@MarcB Thanks for your comment, so the way I used to pass the JSON into PHP is correct ? — code4j
– code4j, Commented Nov 4, 2012 at 8:20
yes, as long as what you pass into json_decode is the json string, then it's valid, regardless of the mime-type it was sent across with. — Marc B
– Marc B, Commented Nov 5, 2012 at 0:01
@MarcB Thanks you so much :) You can reply to this question then I can 'tick' on your answer :) — code4j
– code4j, Commented Nov 7, 2012 at 15:48

Marc B · Accepted Answer · 2012-11-07 18:52:06Z

2

The content-type is only useful in certain cases, such as jquery doing a standard .post where you haven't explicitly told it to expect a json response. A json string is just text, and the content-type is just a clue to the receiver. but you could still send a json string with image/jpeg and still decode it and get a native structure again.

As long as what you pass into json_decode() is a valid JSON string, regardless of the mime-type it was sent with, it'll be decoded into a native structure.

answered Nov 7, 2012 at 18:52

Marc B

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