php curl 请求被拒403，需要加上请求头

有些时候直接curl请求数据会被服务器拒绝，需要加上请求头模拟真人操作，上代码。

$headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:33.0) Gecko/20100101 Firefox/33.0';

foreach( $headers as $n => $v )

{ $headerArr[] = $n .':' . $v; }

$ch=curl_init();

curl_setopt($ch,CURLOPT_URL,  '/common/journalism');

curl_setopt($ch,CURLOPT_HEADER,0);

curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

curl_setopt ($ch, CURLOPT_HTTPHEADER , $headerArr );

$arr = curl_exec($ch);

curl_close($ch);

echo $arr;