php 图片上传代码,支持水印,缩略图

时间：2015-01-23 来源：西部数据作者：西部数据

此代码可以为上传的图片加水印同时还可以比例缩放图片,有需要的朋友可以参考一下,php 图片上传代码如下:

<?php

$uptypes=array('image/jpg', //上传文件类型列表

'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="upload/"; //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

?>

<html>

<head>

<title>M4U BLOG - fywyj.cn</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<style type="text/css">body,td{font-family:tahoma,verdana,arial;font-size:11px;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}</style>

</head>

<body>

<center><form enctype="multipart/form-data" method="post" name="upform">

上传文件: <br><br><br>

<input name="upfile" type="file" style="width:200;border:1 solid #9a9999; font-size:9pt; background-color:#ffffff" size="17">

<input type="submit" value="上传" style="width:30;border:1 solid #9a9999; font-size:9pt; background-color:#ffffff" size="17"><br><br><br>

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

<a href="index.php">返回</a>

</form>

<?php

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

{

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

//是否存在文件

{

echo "<font color='red'>文件不存在！</font>";

exit;

}

$file = $_FILES["upfile"];

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

//检查文件大小

{

echo "<font color='red'>文件太大！</font>";

exit;

}

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

//检查文件类型

{

echo "<font color='red'>只能上传图像文件或Flash！</font>";

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 "<font color='red'>同名文件已经存在了！</a>";

exit;

}

//开源代码phpfensi.com

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

{

echo "<font color='red'>移动文件出错！</a>";

exit;

}

$pinfo=pathinfo($destination);

$fname=$pinfo[basename];

echo " <font color=red>已经成功上传</font><br>文件名: <font color=blue>".$destination_folder.$fname."</font><br>";

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("<font color='red'>不能上传此类型文件！</a>");

exit;

}

imagecopy($nimage,$simage,0,0,0,0,$image_size[0],$image_size[1]);

imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$white);

switch($watertype)

{

case 1: //加水印字符串

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

break;

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 "<br>图片预览:<br>";

echo "<a href="".$destination."" target='_blank'><img src="".$destination."" width=".($image_size[0]*$imgpreviewsize)." height=".($image_size[1]*$imgpreviewsize);

echo " alt="图片预览:r文件名:".$destination."r上传时间:" border='0'></a>";

}

}

?>

</center>

</body>

</html>