JSON sort by key which is in second level - php

Question

Hi is there any way to sort JSON before parsing? i want to sort by OutcomeDateTime. This is my JSON
{
"State of Origin 2014":{
"1471137":{
"EventID":1471137,
"ParentEventID":1471074,
"MainEvent":"State Of Origin Series 2014",
"OutcomeDateTime":"2014-06-18 20:10:00.0000000",
"Competition":"State of Origin 2014",
"Competitors":{
"ActiveCompetitors":3,
"Competitors":[
{
"Team":"New South Wales (2 - 1)",
"Win":"2.15"
},
{
"Team":"New South Wales (3 - 0)",
"Win":"3.05"
},
{
"Team":"Queensland (2 - 1)",
"Win":"3.30"
}
],
"TotalCompetitors":3,
"HasWinOdds":true
},
"EventStatus":"Open",
"IsSuspended":false,
"AllowBets":true
},
"1471074":{
"EventID":1471074,
"ParentEventID":0,
"MainEvent":"State Of Origin Series 2014",
"OutcomeDateTime":"2014-07-09 20:10:00.0000000",
"Competition":"State of Origin 2014",
"Competitors":{
"ActiveCompetitors":2,
"Competitors":[
{
"Team":"New South Wales",
"Win":"1.33"
},
{
"Team":"Queensland",
"Win":"3.30"
}
],
"TotalCompetitors":2,
"HasWinOdds":true
},
"EventStatus":"Open",
"IsSuspended":false,
"AllowBets":true
}
},
"State of Origin 2014 Game 2":{
"3608662":{
"EventID":3608662,
"ParentEventID":3269132,
"MainEvent":"New South Wales v Queensland",
"Competitors":{
"ActiveCompetitors":39,
"Competitors":[
{
"TeamName":"New South Wales 6-10",
"Win":"4.70"
},
{
"TeamName":"Queensland 91+",
"Win":"201.00"
}
],
"TotalCompetitors":39,
"HasWinOdds":true
},
"EventStatus":"Open",
"IsSuspended":false,
"AllowBets":true
}
}
}
This is my code
foreach ($json_a as $root_element => $childnode) {
echo("{<br />");
foreach( $childnode as $cKey => $subChild) {
if($subChild['ParentEventID']=='0')
{
echo("Australian Rules : [");
echo("<br />");
echo("{<br />");
echo "MainEvent: ".$subChild['MainEvent'];
echo "<br />OutcomeDateTime: ".$subChild['OutcomeDateTime'];
echo "<br />Competitors:[ <br />{";
if (is_array($subChild['Competitors']['Competitors']) and count ($subChild['Competitors']['Competitors']) == 2 ) {
foreach($subChild['Competitors']['Competitors'] as $compKey => $compVal) {
// Since your array contains Team and TeamName , I use array_key_exists to check whick key to use
$teamName = array_key_exists('Team',$compVal) ? $compVal['Team'] : $compVal['Name'];
$win = $compVal['Win'];
echo "<br />Team: ".$teamName;
echo "<br />Win: ".$win;
echo "<br /> } , {";
}
}
}
}
I want to sort my data by OutcomeDateTime but latest data should be Time.Now+10minutes . My sorting element is inside second level. Is there any way to sort by OutcomeDateTime and get top 3 results?