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php教程图片上传,可实现预览
header("content-Type: text/html; charset=gb2312");
$uptypes=array("image/jpg", //上传文件类型列表
"image/jpeg",
"image/png",
"image/pjpeg",
"image/gif",
"image/bmp",
"application/x-shockwave-flash",
"image/x-png",
"application/msword",
"audio/x-ms-wma",
"audio/mp3",
"application/vnd.rn-realmedia",
"application/x-zip-compressed",
"application/octet-stream");$max_file_size=10000000; //上传文件大小限制, 单位BYTE
$path_parts=pathinfo($_SERVER["PHP_SELF"]); //取得当前路径
$destination_folder="up/"; //上传文件路径
$watermark=0; //是否附加水印(1为加水印,0为不加水印);
$watertype=1; //水印类型(1为文字,2为图片)
$waterposition=2; //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="www.yinao.tk"; //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,0为不生成);
$imgpreviewsize=1/1; //缩略图比例
?>
图片上传储存
<script type="text/网页特效">function oCopy(obj){obj.select();js=obj.createTextRange();js.execCommand("Copy");};function sendtof(url){window.clipboardData.setData("Text",url);alert("复制地址成功,粘贴给你好友一起分享。");};function select_format(){var on=document.getElementById("fmt").checked;document.getElementById("site").style.display=on?"none":"";document.getElementById("sited").style.display=!on?"none":"";};var flag=false;function DrawImage(ImgD){var image=new Image();image.src=ImgD.src;if(image.width>0&&image.height>0){flag=true;if(image.width/image.height>=120/80){if(image.width>120){ImgD.width=120;ImgD.height=(image.height*120)/image.width;}else {ImgD.width=image.width;ImgD.height=image.height;};ImgD.alt=image.width+"×"+image.height;}else {if(image.height>80){ImgD.height=80;ImgD.width=(image.width*80)/image.height;}else {ImgD.width=image.width;ImgD.height=image.height;};ImgD.alt=image.width+"×"+image.height;}};};function FileChange(Value){flag=false;document.all.uploadimage.width=10;document.all.uploadimage.height=10;document.all.uploadimage.alt="";document.all.uploadimage.src=Value;};</script>
if ($_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"], $uptypes))
//检查文件类型
{
echo "不能上传此类型文件!";
exit;
}if(!file_exists($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 " 成功上传,鼠标移动到地址栏自动复制
图片UBB代码
文件地址:
文件地址:";
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,$image_size[1],$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 "
图片预览:
";
echo "";
}
}
?>