MooTools - JSON Sort php array

<script>
window.addEvent('domready', function(){
	getJSON('name');
	$$('.link').addEvent('click', function(e) {
		getJSON(this.get('rel'));
	});
});

function getJSON(rel){
	new Request.JSON({
		onFailure: function(){alert('Error');},
		onRequest: function(){$('box').set('text', 'Loading...');},
		onSuccess: function(person){dataJSON(person);},
		url:'json_array.php'
		}).get({
		sort:rel
	});
}

function dataJSON(data){
	$('box').empty();
	Array.each(data, function(el, index){
			date = el.name+'.....'+el.age+'......'+el.height+'.........'+el.weight;
			new Element('div',{id:'line',html:date}).inject($('box'));
			
	});
}
</script>

<style>
#line{border-top:1px solid #ccc;padding:5px}
</style>

<b class=link rel=name>Name</b> | <b class=link rel=age>Age</b> | <b class=link rel=height>Height</b> | <b class=link rel=weight>Weight</b>
<div id='box'></div>

<?php
$result =array( 
array('name' => 'Mike','age' => '25', 'height' => '178','weight'=>'75'),
array('name' => 'Fred','age' => '22', 'height' => '188','weight'=>'99'),
array('name' => 'Aron','age' => '32', 'height' => '168','weight'=>'80'),
array('name' => 'Will','age' => '31', 'height' => '158','weight'=>'52'),
array('name' => 'Zoie','age' => '18', 'height' => '178','weight'=>'55'),
array('name' => 'July','age' => '45', 'height' => '155','weight'=>'70')
);

function subval_sort($a,$subkey,$sort) {
	foreach($a as $k=>$v) {
		$b[$k] = strtolower($v[$subkey]);
	}
	$sort($b);
	foreach($b as $key=>$val) {
		$c[] = $a[$key];
	}
	return $c;
}

if(isset($_GET['sort'])){
$result = subval_sort($result,$_GET['sort'],'asort'); 
}

echo json_encode($result);
?>

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