JSON Response Multidimensional Array - php

Question

Hello i got a JSON response that looks like the one below. I want to count the posts that are younger then 24 hours and also check for unique user urls:
{
"meta":{
"network":"all",
"query_type":"realtime"
},
"posts":[
{
"network":"facebook",
"posted":"2014-08-16 08:31:31 +00000",
"sentiment":"neutral",
"url":"someURL",
"user":{
"name":"Terance Podolski",
"url":"someURL",
"image":"someURL"
}
},
{
"network":"facebook",
"posted":"2014-08-16 08:30:44 +00000",
"sentiment":"neutral",
"url":"someURL",
"user":{
"name":"Łukasz Podolski",
"url":"someURL",
"image":"someURL"
}
},
{
"network":"facebook",
"posted":"2014-08-16 08:25:39 +00000",
"sentiment":"neutral",
"url":"someURL",
"user":{
"name":"Marcin Podolski",
"url":"someURL",
"image":"someURL"
}
}
]
}
Thanks in advance.
With the help of #Elias Van Ootegem i got my problem solved. The code looks like that:
// Json Reponse decodieren
$jsonArray = json_decode($jsonData);
function getMentionsFromLast24H($myArray){
// set variable exactly one day ago
$since = new DateTime('-1 day');
// array where to store timestamps in
$recent = array();
foreach ( $myArray -> posts as $post ) {
try {
$post -> posted = new DateTime (substr ( $post->posted,0,19 ) );//create DateTime instance
if ( $post -> posted >= $since )
$recent[] = $post;//add to array
} catch ( Exception $e ) {
echo $e -> getMessage();
exit(1);
}
}
return $recent;
}
$mentions24h = count(getMentionsFromLast24H($jsonArray));
print_r($mentions24h);

Answer 1

It's pretty simple, really: decode the json data, compare the posted values with time - 24 hours, if the value is great than time-24 hours, add it to an array. That's it, you'll end up with an array containing all posts that were added in the last 24 hours:
$data = json_decode($jsonData);//creates object
$since = new DateTime('yesterday');
$recent = array();//this is the array we'll be constructing
foreach ($data->posts as $post)
{
$post->posted = new DateTime($post->posted);//create DateTime instance
if ($post->posted > $since)
$recent[] = $post;//add to array
}
var_dump($recent);//this is the array you're after
That really is all there is to it.