php 获取并解析哈工大ltp-cloud返回的json数据

<?php
		if(isset($_POST['submit'])==false)
		{
?>
		<form action="ltpcloud.php" method="post">
			<input type="text" id="userText" name="userText" value="。" />
			<input type="submit" id="submit" name="submit" value="GO" />
		</form>
		<ul id="result">
<?php
		}
		else{
			$mytext=$_POST['userText'];
			$url="http://ltpapi.voicecloud.cn/analysis/?api_key=yourapi_key &text=".$mytext."&pattern=pos&format=json";
			$fcontents=file_get_contents($url);
			$jsonObj=json_decode($fcontents);
			$tempArr=$jsonObj[0][0];
			print("<br/>");
			foreach($tempArr as $item)
			{
				print("<li>".$item->id.", ".$item->cont.", ".$item->pos."</li>");
			}
		}
?>