How to retrieve a specified number of recent tweets for a particular user passing username and number of tweets as parameter using php script?

Hi All

I have code to retrieve tweets but producing error
this is my code

$result=file_get_contents('https://api.twitter.com/1.1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=php_net&count=10');
$tweets=json_decode($result);
print_r($tweets);