php curl简单采集图片生成base64编码(并附curl函数参

<?php 
$url="http://c.hiphotos.baidu.com/image/w%3D210/sign=ed30880babec8a13141a50e1c7029157/d52a2834349b033be1a9503e17ce36d3d539bd35.gif";
function curl_url($url,$type=0,$timeout=30){
 $msg = ['code'=>2100,'status'=>'error','msg'=>'未知错误！'];
 $imgs= ['image/jpeg'=>'jpeg',
        'image/jpg'=>'jpg',
        'image/gif'=>'gif',
        'image/png'=>'png',
        'text/html'=>'html',
        'text/plain'=>'txt',
        'image/pjpeg'=>'jpg',
        'image/x-png'=>'png',
        'image/x-icon'=>'ico'
  ];
 if(!stristr($url,'http')){
 $msg['code']= 2101;
 $msg['msg'] = 'url地址不正确!'; 
 return $msg;
 } 
 $dir= pathinfo($url);
 //var_dump($dir);
 $host = $dir['dirname'];
 $refer= $host.'/';
 $ch = curl_init($url);
 curl_setopt ($ch, CURLOPT_REFERER, $refer); //伪造来源地址
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//返回变量内容还是直接输出字符串,0输出,1返回内容
 curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);//在启用CURLOPT_RETURNTRANSFER的时候，返回原生的（Raw）输出
 curl_setopt($ch, CURLOPT_HEADER, 0); //是否输出HEADER头信息 0否1是
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); //超时时间
 $data = curl_exec($ch);
 //$httpCode = curl_getinfo($ch,CURLINFO_HTTP_CODE); 
 //$httpContentType = curl_getinfo($ch,CURLINFO_CONTENT_TYPE);
 $info = curl_getinfo($ch);
 curl_close($ch);
 $httpCode = intval($info['http_code']);
 $httpContentType = $info['content_type'];
 $httpSizeDownload= intval($info['size_download']);
 if($httpCode!='200'){
 $msg['code']= 2102;
 $msg['msg'] = 'url返回内容不正确！';
 return $msg;
 }
 if($type>0 && !isset($imgs[$httpContentType])){
 $msg['code']= 2103;
 $msg['msg'] = 'url资源类型未知！';
 return $msg;
 }
 if($httpSizeDownload<1){
 $msg['code']= 2104;
 $msg['msg'] = '内容大小不正确！';
 return $msg;
 }
 $msg['code'] = 200;
 $msg['status']='success';
   $msg['msg']  = '资源获取成功';
 if($type==0 or $httpContentType=='text/html') $msg['data'] = $data;
 $base_64 = base64_encode($data);
 if($type==1) $msg['data'] = $base_64;
 elseif($type==2) $msg['data'] = "data:{$httpContentType};base64,{$base_64}";
 elseif($type==3) $msg['data'] = "<img src='data:{$httpContentType};base64,{$base_64}' />";
 else $msg['msg'] = '未知返回需求！'; 
 unset($info,$data,$base_64);
 return $msg;
}
$msg = curl_url($url,3);
if($msg['status']=='success') echo $msg['data'];
die;
?>