【www.gdgbn.com--php常用代码】

if( isset($_FILES["upImg"]) )
{
 if( $userGroup[$loginArr["group"]]["upload"] == 0 )
 {
  echo "{"error":"您所在的用户组无权上传图片!"}";
 }
 else
 {
  $savePath = "attachment/img/".date("Y/m/d/H");

  mkDirs($savePath);

  $fileType = strtolower(strrchr($_FILES["upImg"]["name"],"."));

  if ( !in_array($fileType, array(".jpg",".jpeg",".gif",".png")) )
  {
   echo "{"error":"目前仅支持格式为jpg、jpeg、gif、png的图片!"}";
  }
  elseif( $_FILES["upImg"]["size"] > 204800 )
  {
   echo "{"error":"图片不能超过200K!"}";
  }
  else
  {
   $saveImg = $savePath."/".$loginArr["uid"]."_".time().rand().$fileType;

   if( @move_uploaded_file($_FILES["upImg"]["tmp_name"], $saveImg) )
   {
    echo "{"error":"","msg":"http://".$site_domain.$site_catalog.$saveImg.""}";
   }
   else
   {
    echo "{"error":"图片上传失败!"}";
   }
  }
 }
}

if( $loginArr["state"] == 0 )
{
 echo "{"error":"您还没有登录!"}";
}
else
{
 $avatarPath = "attachment/avatar/".($loginArr["uid"]%32)."/".($loginArr["uid"]%257)."/".$loginArr["uid"];

 if( isset($_FILES["upAvatar"]) )
 {
  mkDirs($avatarPath);

  $fileType = strtolower(strrchr($_FILES["upAvatar"]["name"],"."));

  if ( !in_array($fileType, array(".jpg",".jpeg",".gif",".png")) )
  {
   echo "{"error":"目前仅支持格式为jpg、jpeg、gif、png的图片!"}";
  }
  elseif( $_FILES["upAvatar"]["size"] > 2097152 )
  {
   echo "{"error":"图片不能超过2MB!"}";
  }
  else
  {
   $imgInfo = @getimagesize($_FILES["upAvatar"]["tmp_name"]);

   if( !$imgInfo || !in_array($imgInfo[2], array(1,2,3)) )
   {
    echo "{"error":"系统无法识别您上传的文件!"}";
   }
   else
   {
    $TmpAvatar = $avatarPath."/temp".$fileType;
    
    if( @move_uploaded_file($_FILES["upAvatar"]["tmp_name"], $TmpAvatar) )
    {
     $maxWidth = 520;

     $maxHeight = 520;

     if( $maxWidth > $imgInfo[0] || $maxHeight > $imgInfo[1] )
     {
      $maxWidth = $imgInfo[0];

      $maxHeight = $imgInfo[1];
     }
     else
     {
      if ( $imgInfo[0] < $imgInfo[1] )
       $maxWidth = ($maxHeight / $imgInfo[1]) * $imgInfo[0];
      else
       $maxHeight = ($maxWidth / $imgInfo[0]) * $imgInfo[1];
     }

     if( $maxWidth < 40 )
     {
      $maxWidth = 40;
     }

     if( $maxHeight < 40 )
     {
      $maxHeight = 40;
     }

     $image_p = imagecreatetruecolor($maxWidth, $maxHeight);

     switch($imgInfo[2])
     {
      case 1:
       $image = imagecreatefromgif($TmpAvatar);
       break;
      case 2:
       $image = imagecreatefromjpeg($TmpAvatar);
       break;
      case 3:
       $image = imagecreatefrompng($TmpAvatar);
       break;
     }

     imagecopyresampled($image_p, $image, 0, 0, 0, 0, $maxWidth, $maxHeight, $imgInfo[0], $imgInfo[1]);

     imagejpeg($image_p, $avatarPath."/temp.jpg",100);

     imagedestroy($image_p);

     imagedestroy($image);

     if( $fileType != ".jpg" && file_exists($TmpAvatar) )
     {
      unlink($TmpAvatar);
     }

     echo "{"error":"","url":"".$avatarPath."/temp.jpg?".rand()."","width":"".$maxWidth."","height":"".$maxHeight.""}";
    }
    else
    {
     echo "{"error":"图片上传失败!"}";
    }
   }
  }
 }

 if( isset($_POST["x"],$_POST["y"],$_POST["w"],$_POST["h"]) )
 {
  if( is_numeric($_POST["x"]) && is_numeric($_POST["y"]) && $_POST["w"] > 0 && $_POST["h"] > 0 )
  {
   $image_p = imagecreatetruecolor(40, 40);

   $image = imagecreatefromjpeg($avatarPath."/temp.jpg");

   imagecopyresampled($image_p, $image, 0, 0, $_POST["x"], $_POST["y"], 40, 40, $_POST["w"], $_POST["h"]);

   imagejpeg($image_p, $avatarPath."/40_40.jpg",100);

   imagedestroy($image_p);

   imagedestroy($image);

   unlink($avatarPath."/temp.jpg");

   echo "1";
  }
 }

 if( isset($_POST["avatar"]) && $_POST["avatar"] == "delete" )
 {
  if( file_exists($avatarPath."/temp.jpg") )
  {
   unlink($avatarPath."/temp.jpg");
  }
 }
}

ob_end_flush();

本文来源：http://www.gdgbn.com/jiaocheng/22680/