php上传文件
会写code的凳子哥 2014-07-28
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<?php
/******************************************************************************
参数说明:
$max_file_size:上传文件大小限制,单位BYTE
$destination_folder:上传文件路径
$watermark:是否附加水印(1为加水印,其他为不加水印);
使用说明:
1.将PHP.INI文件里面的"extension=php_gd2.dll"一行前面的;号去掉,因为我们要用到GD库;
2.将extension_dir=改为你的php_gd2.dll所在目录;
******************************************************************************/
//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=2000000;//上传文件大小限制,单位BYTE
$destination_folder="uploadimg/";//上传文件路径
$watermark=0;//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="";//水印字符串
$waterimg="";//水印图片
$imgpreview=1;//是否生成预览图(1为生成,其他为不生成);
$imgpreviewsize=1/2;//缩略图比例
?>
<html>
<head>
<title>图片上传程序</title>
<styletype="text/css">
<!--
body
{
font-size:9pt;
}
input
{
background-color:#66CCFF;
border:1pxinset#CCCCCC;
}
-->
</style>
</head>
<body>
<formenctype="multipart/form-data"method="post"name="upform">
上传文件:
<inputname="upfile"type="file">
<inputtype="submit"value="上传"><br>
允许上传的文件类型为:<?=implode(',',$uptypes)?>
</form>
<?php
if($_SERVER['REQUEST_METHOD']=='POST')
{
$destination_folder=$destination_folder.date('Ym',time())."/";
echo$destination_folder;
if(!is_uploaded_file($_FILES["upfile"]["tmp_name"]))
//是否存在文件
{
echo"图片不存在!";
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"文件类型不符!".$file["type"];
exit;
}
if(!file_exists($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";
exit;
}
$pinfo=pathinfo($destination);
$fname=$pinfo["basename"];
echo"<fontcolor=red>已经成功上传</font><br>文件名:<fontcolor=blue>".$destination_folder.$fname."</font><br>";
echo"宽度:".$image_size[0];
echo"长度:".$image_size[1];
echo"<br>大小:".$file["size"]."bytes";
if($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])
{
case1:
$simage=imagecreatefromgif($destination);
break;
case2:
$simage=imagecreatefromjpeg($destination);
break;
case3:
$simage=imagecreatefrompng($destination);
break;
case6:
$simage=imagecreatefromwbmp($destination);
break;
default:
die("不支持的文件类型");
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($watertype)
{
case1://加水印字符串
imagestring($nimage,2,3,$image_size[1]-15,$waterstring,$black);
break;
case2://加水印图片
$simage1=imagecreatefromgif("xplore.gif");
imagecopy($nimage,$simage1,0,0,0,0,85,15);
imagedestroy($simage1);
break;
}
switch($iinfo[2])
{
case1:
//imagegif($nimage,$destination);
imagejpeg($nimage,$destination);
break;
case2:
imagejpeg($nimage,$destination);
break;
case3:
imagepng($nimage,$destination);
break;
case6:
imagewbmp($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"<imgsrc=\"".$destination."\"width=".($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:\">";
}
}
?>
</body>
</html>
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