JSON数组进行相同的编码和解码

Question

I encode an array to json format using the code below :

$arrayName[] = array('user_role_id' => 1, 'user_id' => 1);
$arrayName[] = array('user_role_id' => 2, 'user_id' => 2);

$jos = json_encode(array_values($arrayName));

The output is

[{"user_role_id":1,"user_id":1},{"user_role_id":2,"user_id":2}]

And sent it to browser.

Then after some steps browser returns the same array.

But when I try to decode

$return = json_decode($jos,TRUE);

I receive the error : Array to string conversion.

Browser didnt do anything to the array. Simply returns what I supply.

Code flow will be like :

<?php

if(isset($_GET['array']))
{
    $arrayName[] = array('user_role_id' => 1, 'user_id' => 1);
    $arrayName[] = array('user_role_id' => 2, 'user_id' => 2);
    header('Content-Type: application/json');
    echo $jos = json_encode($arrayName);
}
else
{
    if(isset($_POST['jos']))
    {
        $jos = $_POST['jos'];

        echo $new_jos = json_decode($jos,TRUE);
    }
}

Can anybody please help me?

What might be wrong?

Answer 1

The problem is this line:

echo $new_jos = json_decode($jos,TRUE);

so you convert your json string to an array(that works!) and then echo it - that is what throws the error.

Just use

$new_jos = json_decode($jos,TRUE);

Answer 2

尝试在PHP文件中添加以下行，以便从浏览器接收数据，然后尝试解码。

header('Content-Type: application/json');