先上个效果图：
Sample6_1.php 中创建Form：
<BR>//显示上传状态和图片 <BR><div id="showimg">
//上传文件需要定义enctype，为了显示图片将target设为uploadframe
<form id="uploadform" action="process_upload.php" method="post"
enctype=”multipart/form-data” target=”upl
搞gaodaima代码oadframe”>
Upload a File:
//上传文件
<iframe id=”uploadframe” name=”uploadframe” src=”process_upload.php” class=”noshow”></iframe>
上传图片函数 uploadimg：
<BR>function uploadimg(theform){ <BR>//提交Form <BR>theform.submit(); <BR>//在showimg <div>中显示上传状态 <BR>setStatus ("Loading...","showimg"); <BR>} <BR>//上传状态函数 <BR>function setStatus (theStatus, theObj){ <BR>obj = document.getElementById(theObj); <BR>if (obj){ <BR>obj.innerHTML = "<div class="bold">" + theStatus + "
“;
}
}
process_upload.php 提供文件上传功能：
<BR><?php <BR>//提供图片类型校验 <BR>$allowedtypes = array("image/jpeg","image/pjpeg","image/png", "image/x-png","image/gif"); <BR>//文件存放目录 <BR>$savefolder = "images"; <br><br>//如果有文件上传就开始干活 <BR>if (isset ($_FILES['myfile'])){ <BR>//检查上传文件是否符合$allowedtypes类型 <BR>if (in_array($_FILES['myfile']['type'],$allowedtypes)){ <BR>if ($_FILES['myfile']['error'] == 0){ <BR>$thefile = "$savefolder/".$_FILES['myfile']['name']; <BR>//通过move_uploaded_file上传文件 <BR>if (!move_uploaded_file($_FILES['myfile']['tmp_name'], $thefile)){ <BR>echo "There was an error uploading the file."; <BR>} <BR>else{ <BR>?> <BR><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" <BR>"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <BR> <BR> <BR><script type="text/javascript" src="functions.js"></script> <BR> <BR><body> <BR><!---ecms -ecms 显示图片 --> <BR>" onl oad="doneloading(parent,'<?php echo $thefile; ?>')" /> <BR> <BR> <BR><?php <BR>} <BR>} <BR>} <BR>} <BR>?> <BR>
上面代码最后部分的doneloading 函数就是用来显示图片及修改图片尺寸大小。其中会用到thumb.php，它会在images目录中生成出源图片的大、中、小三个尺寸，有兴趣可以研究一下。欢迎大家拍砖～
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