try this
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, 'http://havanzee.tk/api/quote.json');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, false);
$strc = json_decode(curl_exec($curl),true);
curl_close($curl);
$i = rand(0,count($strc['danh-ngon'])-1);
echo $strc['danh-ngon'][$i]['content'];
4
solved Random value json in php [duplicate]