谁想做这个功能的可以联系我发私信也可以，或者加QQ群联系我：136112330
图片裁剪，预览，上传保存的功能。这个功能一般用于会员中心的图片。
下面代码为js实现图片上传预览
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="/1999/xhtml"><body><input type=file name="doc" id="doc" οnchange="javascript:setImagePreview();"><p><div id="localImag"><img id="preview" width=-1 height=-1 style="diplay:none" /></div></p><script>function setImagePreview() {var docObj=document.getElementById("doc");var imgObjPreview=document.getElementById("preview");if(docObj.files && docObj.files[0]){//火狐下，直接设img属性imgObjPreview.style.display = 'block';imgObjPreview.style.width = '300px';imgObjPreview.style.height = '120px';//imgObjPreview.src = docObj.files[0].getAsDataURL();//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式 imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);}else{//IE下，使用滤镜docObj.select();var imgSrc = document.selection.createRange().text;var localImagId = document.getElementById("localImag");//必须设置初始大小localImagId.style.width = "300px";localImagId.style.height = "120px";//图片异常的捕捉，防止用户修改后缀来伪造图片try{localImagId.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;}catch(e){alert("");return false;}imgObjPreview.style.display = 'none';document.selection.empty();}return true;}</script></body></html>
php上传缩略图
<form method="post" action="suo_do.php" enctype="multipart/form-data"><input type="file" name="pic" /><input type="submit" value="上传1" /></form><?phpheader("content-type:text/html;charset=gbk");ini_set("date.timezone","Asia/chong");//判断文件是否为空if(empty($_FILES)){echo"上传文件过大";exit;}//判断文件上传是否有错误if($_FILES['pic']['error']){echo "上传文件";exit;}//判断文件类型是否非法获取文件后缀$allowtype=array("jpg","png","jpeg","gif");$a=explode('.',$_FILES['pic']['name']);$index=count($a)-1;$ex=strtolower($a[$index]);if(!in_array($ex,$allowtype)){echo "上传文件非法";exit;}$file=date('YmdHis').rand().".".$ex;$src=$_FILES['pic']['tmp_name'];$des="upload/".$file;$rs=move_uploaded_file($src,$des);//缩略图//读取已经上传图片$image=imagecreatefromjpeg($des);$a=getimagesize($des);$w=$a[0];$h=$a[1];if($w>$h){$width=300;$height=$width/$w*$h;}else if($w<$h){$height=300;$width=$height/$h*$w;}else{$width=300;$height=300;}//创建空白新图片$newimage=imagecreatetruecolor($width, $height);//copy源图片内容 copy新图片imagecopyresized($newimage, $image, 0,0, 0,0, $width, $height, $w, $h);$filename="upload/s_".$file;imagejpeg($newimage,$filename);
php图片上传
<?phpheader('content-type:text/html;charset=gbk');/******************************************************************************参数说明:$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=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);$waterstring="这是水印"; //水印字符串$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><meta http-equiv="Content-Type" content="text/html; charset=gbk" /><title>ZwelL图片上传程序</title><style type="text/css"><!--body{font-size: 9pt;}input{background-color: #66CCFF;border: 1px inset #CCCCCC;}--></style></head><body><form enctype="multipart/form-data" method="post" name="upform">上传文件:<input name="upfile" type="file"><input type="submit" value="上传"><br>允许上传的文件类型为:<?=implode(', ',$uptypes)?></form><?phpif ($_SERVER['REQUEST_METHOD'] == 'POST'){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=$pinfo[basename];echo " <font color=red>已经成功上传</font><br>文件名: <font color=blue>".$destination_folder.$fname."</font><br>";echo " 宽度:".$image_size[0];echo " 长度:".$image_size[1];echo "<br> 大小:".$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]){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($watertype){case 1: //加水印字符串imagestring($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 "<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:\">";}}?></body></html>
