CURL中的curl_close($ch)、return

在執行過curl_exe後記得關閉句柄：curl_close($ch);

$url = 'http://www.baidu.com';
$ch = curl_init();   
curl_setopt ($ch, CURLOPT_URL,$url);  
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);   
curl_setopt($ch, CURLOPT_HTTPHEADER,$header);
curl_setopt ($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36');  
curl_setopt ($ch, CURLOPT_TIMEOUT, 20); 
$content = curl_exec($ch); 
curl_close($ch);

如果設了function函數，記得return返回，強制結束

function getHtml($headers, $url) {
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_HTTPHEADER,$headers);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_sEtopt($ch, CURLOPT_RETURNTRANSFER, 1); 
	$data = curl_exec($ch);
	curl_close($ch);
	return $data;
}