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<?php
/**
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——————————————————————————————————————————————————————————————————————————————————
**/
function upload_image($key,$dir) {
 
   $fname  = $_FILES[$key]['name'];
   $ftype  = $_FILES[$key]['type'];
   $fsize  = $_FILES[$key]['size'];
   $ftmpl  = $_FILES[$key]['tmp_name'];
   $ferror = $_FILES[$key]['error'];
  
   $imagetype = array("image/jpeg","image/jpg","image/gif","image/pjpeg");
   if($ferror==2 or $ferror==1) {
      echo '<script>alert("ͼƬ¹ý´ó");history.go(-1);</script>';
   exit;
   }
   if(!is_uploaded_file($ftmpl)){
      echo '<script>alert("ÉÏ´«Í¼Æ¬Ê§°Ü£¬ÇëÉÔºóÖØÊÔ1");history.go(-1);</script>';
   exit;
   }
   $is_true   = in_array($ftype,$imagetype);
   if(!$is_true) {
      echo '<script>alert("ͼƬ¸ñʽ²»ÕýÈ·");history.go(-1);</script>';
   exit;
   }
   if($fsize>2*(1024*1024)) {
      echo '<script>alert("ͼƬ¹ý´ó");history.go(-1);</script>';
   exit;
   }
   if(!file_exists($dir)) {
     mkdir($dir);
   }
   $fn


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