php 通过 exif_imagetype（） 判断网络图片是否存在!

header("Content-type: text/html; charset=utf-8"); 
 
 $t1 = time();
 $check = array();
 
 $h[0] = "http://www.edai.com/edai/Resource/album/201207/04/2012070402192453.jpg";
 $h[1] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001561465.jpg.thumb.jpg";
 $h[2] = "http://image.tuku.china.com/tuku.military.china.com/military//pic/2012-07-11/8a400dcf-10af-4de3-897f-7e730f0ea3a9.jpg";
 $h[3] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001462919.jpg.thumb.jpg"; 
 $h[4] = "http://www.edai.com/edai/Resource/album/201207/02/223839nigi4vnovnn317gx.jpg.thumb.jpg";
 $h[5] = "http://www.edai.com/edai/Resource/album/201207/04/2012070402192453.jpg";
 $h[6] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001561465.jpg.thumb.jpg";
 $h[7] = "http://image.tuku.china.com/tuku.military.china.com/military//pic/2012-07-11/8a400dcf-10af-4de3-897f-7e730f0ea3a9.jpg";
 $h[8] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001462919.jpg.thumb.jpg"; 
 $h[9] = "http://www.edai.com/edai/Resource/album/201207/02/223839nigi4vnovnn317gx.jpg.thumb.jpg";
 $h[10] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001561465.jpg.thumb.jpg";
 $h[11] = "http://image.tuku.china.com/tuku.military.china.com/military//pic/2012-07-11/8a400dcf-10af-4de3-897f-7e730f0ea3a9.jpg";
 $h[12] = "http://www.edai.com/edai/Resource/album/201207/10/2012071001462919.jpg.thumb.jpg"; 
 $h[13] = "http://www.edai.com/edai/Resource/album/201207/02/223839nigi4vnovnn317gx.jpg.thumb.jpg";
 foreach($h as $v){
 $check[] = @exif_imagetype($v);
 }
 $t2 = time();
 
 echo '

'; 
  
  print_r($check); 
  
   echo '
'; 
  
   
  
  echo "时间差:". ($t2-$t1); 
  
 /* 
  
 //exif_imagetype();可能返回的值: 
  
 值 
   常量 
  
 1 
   IMAGETYPE_GIF 
  
 2 
   IMAGETYPE_JPEG 
  
 3 
   IMAGETYPE_PNG 
  
 4 
   IMAGETYPE_SWF 
  
 5 
   IMAGETYPE_PSD 
  
 6 
   IMAGETYPE_BMP 
  
 7 
   IMAGETYPE_TIFF_II（Intel 字节顺序） 
  
 8 
   IMAGETYPE_TIFF_MM（Motorola 字节顺序） 
  
 9 
   IMAGETYPE_JPC 
  
 10 
   IMAGETYPE_JP2 
  
 11 
   IMAGETYPE_JPX 
  
 12 
   IMAGETYPE_JB2 
  
 13 
   IMAGETYPE_SWC 
  
 14 
   IMAGETYPE_IFF 
  
 15 
   IMAGETYPE_WBMP 
  
 16 
   IMAGETYPE_XBM 
  
 */ 
  
 ?>