Complex JSON array to MySQL via PHP - php

Question

I'm aiming to put a selection of info from a JSON result into MySQL via PHP. The specific issue I'm having is with accessing specific info from the JSON result, as it isn't a simple list format. Here is a screenshot of the kind of structure I'm talking about with the information I'm interested in highlighted.:
I sadly don't have enough reputation to post an image so here it is rehosted on imgur:
Under ['streams'] will be a list of 100 streams. From each of those results I want to take the highlighted information and place it into a MySQL table.
I'm fairly comfortable with simpler JSON files and easier applications of json_decode
$result = json_decode($json);
foreach ($result as $key => $value)
I'm thinking perhaps I need to use the depth variable? But finding it difficult to find much information on it.
If anyone can give me any help or point me towards a good source of info (As I have struggled to find anything) then it would be much appreciated.
If anymore information would be useful let me know and I will add it.
edit: link to json request: https://api.twitch.tv/kraken/streams?limit=2/
<?php
//import data from twitch
$json = json_decode(file_get_contents("https://api.twitch.tv/kraken/streams?limit=100/"), true);
//create a DB connection
$con = mysql_connect("CONNECTION INFO :D");
mysql_connect_db('NOPE', $con);
$result = json_decode($json);
foreach ($result as $key => $value) {
if ($value) {
mmysql_query("INSERT INTO twitchinfo (viewers, status, display_name, game, delay, name) VALUES ($value->viewers, $value->status,$value->display_name,$value->game,$value->delay,$value->name)")or die(mysql_error());
}
// end connection
mysql_close($con);
}
?>

Answer 1

Your JSON object is basically something like...
[
links: {
self: http://example.com,
next: http://example.com/foo,
},
streams: [
{
channel: {
foo: 'bar'
},
one: 'one',
somethingElse: 'Something else',
moreStuff: 'more stuff',
}
]
]
When you decode a JSON object you are left with a PHP Object/Array that represents the object.
$x = json_decode('[1,2,3]')
is going to give you the same array as...
$x= array(1,2,3)
If you load up the JSON you've shown and run this:
foreach ($result as $key => $value)
This is the same as accessing $result->links and $result->streams. Each contains more data.
If I wanted to grab the 'foo' element from the channel in my example I would do:
$streams = $result->streams //Get the streams array
$stream = $streams[0] //Get the first stream object
$channel = $stream->channel //Get the channel object
$foo = $channel->foo //Get the value 'bar' out of the foo property.
As long as the structure is predictable (and it is), I can iterate over the streams since it's just an array.
$streams = $result->streams //Get the streams array
foreach ($streams as $stream) {
$channel = $stream->channel //Get the channel object
$foo = $channel->foo //Get the value 'bar' out of the foo property of every stream.
}

Answer 2

Opening this url in browser -
https://api.twitch.tv/kraken/streams?limit=100/
Gives me a JSON. I copied it in -
http://www.jsoneditoronline.org/
and saw that it has streams and _links keys.
As per your issue is concerned, try this -
$result = json_decode($json);
if( isset( $result['streams'] )){
$streams = $result['streams'];
foreach($streams as $stream) {
$viewers = $stream->viewers;
$status = $stream->channel->status;
$display_name = $stream->channel->display_name;
$game = $stream->channel->game;
$delay = $stream->channel->delay;
$name = $stream->channel->name;
$sql = "INSERT INTO twitchinfo (viewers, status, display_name, game, delay, name) VALUES ($viewers, \"$status\", \"$display_name\", \"$game\", $delay, \"$name\")";
mysql_query($sql)or die(mysql_error());
}
}

Answer 3

May be you can do this:
$values = array();
$result = json_decode($json);
foreach($result['streams'] as $stream) {
array_push(
$values,
array(
'viewers' => $stream['viewers'],
'status' => $stream['channel']['status'],
'display_name' => $stream['channel']['display_name'],
'game' => $stream['channel']['game'],
'delay' => $stream['channel']['delay'],
'name' => $stream['channel']['name'],
)
);
}
Or:
foreach($result['streams'] as $stream) {
$sqlQuery= "INSERT INTO TABLE(viewers, status, display_name, game, delay, name) VALUES ($stream['viewers'], $stream['channel']['status'], $stream['channel']['display_name'], $stream['channel']['game'], $stream['channel']['delay'], $stream['channel']['name']);"
//dbHandler->executeQuery($sqlQuery);
}