PHP Json see if value exist - php

Question

I've been looking all over the interwebz for a simple answer but can't find any. So, the question is:
I'm going to decode some JSON to see if a value exists; though, I don't think I'm doing it right. I want to check if the value of appid: 730 exists.
Here's the JSON:
{
response: {
game_count: 106,
games: [
{
appid: 10,
playtime_forever: 67
},
{
appid: 730,
playtime_forever: 0
},
{
appid: 368900,
playtime_forever: 0
},
{
appid: 370190,
playtime_forever: 0
},
]
}
}
This is what I want:
$json = file_get_contents('JSON URL HERE');
$msgArray = json_decode($json, true);
if (appid: 730 exists) {
...
}
Thanks, hope I explained enough.

Answer 1

Firstly, you have invalid json. See the comment in the string deceleration below (this might be a typo in your question).
$json = '{
"response": {
"game_count": 106,
"games": [
{
"appid": 10,
"playtime_forever": 67
},
{
"appid": 730,
"playtime_forever": 0
},
{
"appid": 368900,
"playtime_forever": 0
},
{
"appid": 370190,
"playtime_forever": 0
} // <------ note the lack of `,`
]
}
}';
$arr = json_decode($json, true);
foreach($arr['response']['games'] as $game) {
if($game['appid'] === 730) { // I would strictly check (type) incase of 0
echo "exists"; // or do something else
break; // break out if you dont care about the rest
}
}
example
We're just looping through the games array and checking its appid. Then we just do something and then break the loop to prevent overhead.

Answer 2

I find this solution quite straight forward:
$r='{
"response": {
"game_count": 106,
"games": [
{
"appid": 10,
"playtime_forever": 67
},
{
"appid": 730,
"playtime_forever": 0
},
{
"appid": 368900,
"playtime_forever": 0
},
{
"appid": 370190,
"playtime_forever": 0
}
]
}
}';
function find($arr, $id) {
if(!empty($arr))
foreach ($arr as $key => $value) {
if( isset( $value->appid ) && $value->appid == $id )
return true;
}
return false;
}
$obj = json_decode($r);
if( isset($obj) && isset($obj->response) ) {
if( isset($obj->response->games) && !empty($obj->response->games) )
$arr = $obj->response->games;
else
$arr = array();
} else {
echo "NOT valid found\n";
}
$appid = 730;
if( find($arr, $appid) )
echo "Appid $appid found\n";
else
echo "Appid $appid NOT found\n";
It is very convenient to parse and validate the results coming from other Web Services before accessing their data, so we avoid and development time.
I hope it is what you are looking for.

Answer 3

json_decode()
is actually going to return the decoded JSON. JSON is a string, decoded JSON is an array of objects.
You will need to iterate over that array of objects to inspect each.
$msgArray = json_decode($json);
foreach($msgArray->response->games as $game) {
if($game->appid == 730) {
// it exists
}
}

Answer 4

try this
$json = file_get_contents('JSON URL HERE');
$msgArray = json_decode($json, true);
foreach($msgArray['response']['games'] as $key => $value){
if ($value['appid'] == 730) {
//do something
}else{
// do else
}
}