我正在寻找某种图像上传器和裁剪器，它主要在客户端工作，然后再保存到服务器。
我尝试了一些问题，但问题是大多数是基于html5的，我似乎无法为旧浏览器找到某种基于Flash的上传器。
我对jquery文件上传器略有丢失，我知道它可以在旧版浏览器中使用，但仍然需要处理裁剪功能（但看起来它主要是服务器端，这将是最后的手段）
我还使用http://www.script-tutorials.com/html5-image-uploader-with-jcrop/上传了哪种作品，但是当我想测试裁剪功能时，它会一直打开upload.php文件。我将把下面的代码放在这里：
<!DOCTYPE html >
<html>
<head>
<title>test image uploader</title>
<!--Stylesheets-->
<link href="css/colorbox.css" rel="stylesheet"/>
<link href="css/jquery.Jcrop.min.css" rel="stylesheet"/>
<!-- scripts-->
<script src="js/jquery-1.9.1.min.js" type="text/javascript"></script>
<script src="js/jquery.min.js" type="text/javascript"></script>
<script src="js/jquery.Jcrop.min.js" type="text/javascript"></script>
<script src="js/script.js" type="text/javascript"></script>
</head>
<body >
<form id="upload_form" enctype="multipart/form-data" method="post" action="upload.php" onsubmit="return checkForm();">
<input type="hidden" id="x1" name="x1" />
<input type="hidden" id="y1" name="y1" />
<input type="hidden" id="x2" name="x2" />
<input type="hidden" id="y2" name="y2" />
<h2>Please select image file</h2>
<div>
<input type="file" name="image_file" id="image_file" onchange="fileSelectHandler();"/>
</div>
<div class="error"></div>
<div class="step2">
<h2>Please select a crop region</h2>
<img id="preview" />
<div class="info">
<label>File size</label><input type="text" id="filesize" name="filesize" />
<label>Type</label><input type="text" id="filetype" name="filetype" />
<label>Image dimension</label><input type="text" id="filedim" name="filedim" />
<label>W</label><input type="text" id="w" name="w" />
<label>H</label><input type="text" id="h" name="h" />
</div>
<input type="submit" value="Upload" />
</div>
</form>
</body>
<script type="text/javascript">
// convert bytes into friendly format
function bytesToSize(bytes) {
var sizes = ['Bytes', 'KB', 'MB'];
if (bytes == 0) return 'n/a';
var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
};
// check for selected crop region
function checkForm() {
if (parseInt($('#w').val())) return true;
$('.error').html('Please select a crop region and then press Upload').show();
return false;
};
// update info by cropping (onChange and onSelect events handler)
function updateInfo(e) {
$('#x1').val(e.x);
$('#y1').val(e.y);
$('#x2').val(e.x2);
$('#y2').val(e.y2);
$('#w').val(e.w);
$('#h').val(e.h);
};
// clear info by cropping (onRelease event handler)
function clearInfo() {
$('.info #w').val('');
$('.info #h').val('');
};
function fileSelectHandler() {
// get selected file
var oFile = $('#image_file')[0].files[0];
// hide all errors
$('.error').hide();
// check for image type (jpg and png are allowed)
var rFilter = /^(image\/jpeg|image\/png)$/i;
if (!rFilter.test(oFile.type)) {
$('.error').html('Please select a valid image file (jpg and png are allowed)').show();
return;
}
// check for file size
if (oFile.size > 250 * 1024) {
$('.error').html('You have selected too big file, please select a one smaller image file').show();
return;
}
// preview element
var oImage = document.getElementById('preview');
// prepare HTML5 FileReader
var oReader = new FileReader();
oReader.onload = function (e) {
// e.target.result contains the DataURL which we can use as a source of the image
oImage.src = e.target.result;
oImage.onload = function () { // onload event handler
// display step 2
$('.step2').fadeIn(500);
// display some basic image info
var sResultFileSize = bytesToSize(oFile.size);
$('#filesize').val(sResultFileSize);
$('#filetype').val(oFile.type);
$('#filedim').val(oImage.naturalWidth + ' x ' + oImage.naturalHeight);
// Create variables (in this scope) to hold the Jcrop API and image size
var jcrop_api, boundx, boundy;
// destroy Jcrop if it is existed
if (typeof jcrop_api != 'undefined')
jcrop_api.destroy();
// initialize Jcrop
$('#preview').Jcrop({
minSize: [100, 100], // min crop size
boxWidth:600,
aspectRatio: 9/6, // keep aspect ratio 1:1
bgFade: true, // use fade effect
bgOpacity: .4, // fade opacity
onChange: updateInfo,
onSelect: updateInfo,
onRelease: clearInfo
}, function () {
// use the Jcrop API to get the real image size
var bounds = this.getBounds();
boundx = bounds[0];
boundy = bounds[1];
// Store the Jcrop API in the jcrop_api variable
jcrop_api = this;
});
};
};
// read selected file as DataURL
oReader.readAsDataURL(oFile);
}
</script>
</html>
这是upload.php代码：
<?php
/**
*
* HTML5 Image uploader with Jcrop
*
* Licensed under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright 2012, Script Tutorials
* http://www.script-tutorials.com/
*/
function uploadImageFile() { // Note: GD library is required for this function
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$iWidth = $iHeight = 200; // desired image result dimensions
$iJpgQuality = 90;
if ($_FILES) {
// if no errors and size less than 250kb
if (! $_FILES['image_file']['error'] && $_FILES['image_file']['size'] < 250 * 1024) {
if (is_uploaded_file($_FILES['image_file']['tmp_name'])) {
// new unique filename
$sTempFileName = 'cache/' . md5(time().rand());
// move uploaded file into cache folder
move_uploaded_file($_FILES['image_file']['tmp_name'], $sTempFileName);
// change file permission to 644
@chmod($sTempFileName, 0644);
if (file_exists($sTempFileName) && filesize($sTempFileName) > 0) {
$aSize = getimagesize($sTempFileName); // try to obtain image info
if (!$aSize) {
@unlink($sTempFileName);
return;
}
// check for image type
switch($aSize[2]) {
case IMAGETYPE_JPEG:
$sExt = '.jpg';
// create a new image from file
$vImg = @imagecreatefromjpeg($sTempFileName);
break;
/*case IMAGETYPE_GIF:
$sExt = '.gif';
// create a new image from file
$vImg = @imagecreatefromgif($sTempFileName);
break;*/
case IMAGETYPE_PNG:
$sExt = '.png';
// create a new image from file
$vImg = @imagecreatefrompng($sTempFileName);
break;
default:
@unlink($sTempFileName);
return;
}
// create a new true color image
$vDstImg = @imagecreatetruecolor( $iWidth, $iHeight );
// copy and resize part of an image with resampling
imagecopyresampled($vDstImg, $vImg, 0, 0, (int)$_POST['x1'], (int)$_POST['y1'], $iWidth, $iHeight, (int)$_POST['w'], (int)$_POST['h']);
// define a result image filename
$sResultFileName = $sTempFileName . $sExt;
// output image to file
imagejpeg($vDstImg, $sResultFileName, $iJpgQuality);
@unlink($sTempFileName);
return $sResultFileName;
}
}
}
}
}
}
$sImage = uploadImageFile();
echo '<img src="'.$sImage.'" />';
另一个问题是我对旧版浏览器没有后退选项，主要是IE8和9，因为它只是基于html5。
任何人都可以请任何想法帮助。