read json like facebook json php - php

Question

i try to read json by php
{
"data": [
{
"id": "3043252fsdgdf36360354",
"name": "name1",
"access_token": "CAAIf3VEtVSoBAHrVxHL16zt4H5OvwBmdfgs4F3auPE0NZBx5PmIujBAdqw0Cv4bZACXytT1O1y6FHEZA25E1aqQZD"
},
{
"id": "3326848fdgsdfgsdf03424168",
"name": "name2",
"access_token": "CAAIf3VEtVSoBAJinePVdfgsdfgMxuY3zaj9AimaoKx7VIO9jCqZCHC6ZBixL1n6ZC72LTMn0ZB4T8rOHD27WmzbBVgvUwgspeEZD"
}}
i try by this code
$sfgsdfg= $json_a=json_decode($read,true);
echo $json_a['data'][3043252fsdgdf36360354];
echo $json_a['3043252fsdgdf36360354'][access_token];
not working with this php code i need help to read it
i need select access_token by 3043252fsdgdf36360354 as echo $json_a['data'][3043252fsdgdf36360354]['access_token'];
i need only read by id as . mysql command . select access_token where id ='3326848fdgsdfgsdf03424168';

Answer 1

First of all, your JSON is missing a ] character and will cause json_decode to return NULL. You should first correct the JSON string. You can use a online service such as jsonlint.com to validate the JSON. Once you've decoded the JSON string as an associative array, you can just loop through the array and check if it contains the given ID in it. If it does, you can grab the corresponding access token easily.
I've made this into a short little function. You can use that to get the access token by ID:
$jsonArray = json_decode($str, TRUE);
function getAccessTokenFromID($id, $jsonArray) {
foreach ($jsonArray['data'] as $k => $elem) {
if($elem['id'] == $id) {
$access_token = $elem['access_token'];
}
}
return $access_token;
}
Usage:
$myid = '3043252fsdgdf36360354';
$my_accesstoken = getAccessTokenFromID($myid, $jsonArray);
Demo!

Answer 2

Isn't well formed json.
Try with:
{
"data": [
{
"id": "3043252fsdgdf36360354",
"name": "name1",
"access_token": "CAAIf3VEtVSoBAHrVxHL16zt4H5OvwBmdfgs4F3auPE0NZBx5PmIujBAdqw0Cv4bZACXytT1O1y6FHEZA25E1aqQZD"
},
{
"id": "3326848fdgsdfgsdf03424168",
"name": "name2",
"access_token": "CAAIf3VEtVSoBAJinePVdfgsdfgMxuY3zaj9AimaoKx7VIO9jCqZCHC6ZBixL1n6ZC72LTMn0ZB4T8rOHD27WmzbBVgvUwgspeEZD"
}
]
}
And php:
$val = json_decode($read, TRUE);
echo $val['data'][0]['id'];
UPDATED:
function find_by_id($id, $val) {
foreach($val['data'] as $key => $obj) {
if ($obj['id'] === $id)
return $obj['access_token'];
}
}