​php中file_get_contents和curl两个函数用法

$file_contents = file_get_contents('http://www.scutephp.com/'); 
echo $file_contents; 

$ch = curl_init(); 
$timeout = 5; 
curl_setopt ($ch, CURLOPT_URL, 'http://www.scutephp.com'); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$file_contents = curl_exec($ch); 
curl_close($ch); 
echo $file_contents; 

function vita_get_url_content($url) { 
 
if(function_exists('file_get_contents')) { 
 
$file_contents = file_get_contents($url); 
 
} else { 
 
$ch = curl_init(); 
 
$timeout = 5; 
 
curl_setopt ($ch, CURLOPT_URL, $url); 
 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
 
$file_contents = curl_exec($ch); 
 
curl_close($ch); 
 
} 
 
return $file_contents;