php上传图片精典源码

//上传文件类型列表

$uptypes=array('image/jpg',

'image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image

/x-png');

$max_file_size=5000000; //上传文件大小限制, 单位BYTE

$destination_folder="../image/userhead/"; //上传文件路径

$watermark=1; //是否附加水印(1为加水印,其他为不加水印);

$watertype=1; //水印类型(1为文字,2为图片)

$waterposition=1; //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);

$waterstring="newphp.site.cz"; //水印字符串

$waterimg="xplore.gif"; //水印图片

$imgpreview=1; //是否生成预览图(1为生成,其他为不生成);

$imgpreviewsize=1/2; //缩略图比例

?>

type="text/css">body,td{font-family:tahoma,verdana,arial;font-size:11 px;line-height:15px;background-color:white;color:#666666;margin-left: 20px;}

strong{font-size:12px;}

aink{color:#0066CC;}

a:hover{color:#FF6600;}

aisited{color:#003366;}

a:active{color:#9DCC00;}

table.itable{}

td.irows{height:20px;background:url("index.php?i=dots" repeat-x bottom}

上传文件:

允许上传的文件类型为:jpg|jpeg|png|pjpeg|gif|bmp|x-png|swf

返回

if ($_SERVER['REQUEST_METHOD'] == 'POST')

{

if (!is_uploaded_file($_FILES["upfile"][tmp_name]))

//是否存在文件

{

echo"文件不存在！";

exit;

}

$file = $_FILES["upfile"];

if($max_file_size < $file["size"])

//检查文件大小

{

echo"文件太大！";

exit;

}

if(!in_array($file["type"], $uptypes))

//检查文件类型

{

echo"只能上传图像文件或Flash！"; exit;

}

if(!file_exists($destination_folder))

mkdir($destination_folder);

$filename=$file["tmp_name"];

$image_size = getimagesize($filename);

$pinfo=pathinfo($file["name"]);

$ftype=$pinfo[extension];

$destination = $destination_folder.time().".".$ftype;

if (file_exists($destination) && $overwrite != true) {

echo"同名文件已经存在了！";

exit;

}

if(!move_uploaded_file ($filename, $destination))

{

echo"移动文件出错！";

}

$pinfo=pathinfo($destination);

$fname=$pinfo[basename];

echo" 已经成功上传
文件名: ".$destination_folder.$fname."
";

echo" 宽度:".$image_size[0];

echo" 长度:".$image_size[1];

if($watermark==1)

{

$iinfo=getimagesize($destination,$iinfo);

$nimage=imagecreatetruecolor($image_size[0],$image_size[1]);

$white=imagecolorallocate($nimage,255,255,255);

$black=imagecolorallocate($nimage,0,0,0);

$red=imagecolorallocate($nimage,255,0,0);

imagefill($nimage,0,0,$white);

switch ($iinfo[2])

{

case 1:

$simage =imagecreatefromgif($destination);

break;

case 2:

$simage =imagecreatefromjpeg($destination);

break;

case 3:

$simage =imagecreatefrompng($destination);

break;

case 6:

$simage =imagecreatefromwbmp($destination);

break;

default:

die("不能上传此类型文件！");

exit;

}

imagecopy($nimage,$simage,0,0,0,0,$image_size[0],$image_size[1]); imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$w hite);

switch($watertype)

{

case 1: //加水印字符串

imagestring($nimage,2,3,$image_size[1]-15,$waterstring,$black);

case 2: //加水印图片

$simage1 =imagecreatefromgif("xplore.gif");

imagecopy($nimage,$simage1,0,0,0,0,85,15);

imagedestroy($simage1);

break;

}

switch ($iinfo[2])

{

case 1:

//imagegif($nimage, $destination);

imagejpeg($nimage, $destination);

break;

case 2:

imagejpeg($nimage, $destination);

break;

case 3:

imagepng($nimage, $destination);

break;

case 6:

imagewbmp($nimage, $destination);

//imagejpeg($nimage, $destination);

break;

}

//覆盖原上传文件

imagedestroy($nimage);

imagedestroy($simage);

}

if($imgpreview==1)

{

echo"
图片预览:
";

echo"";

}

}

?>