我有一个裁剪图像脚本。当用户单击保存按钮时,脚本如何上载裁剪的图像?如何使PHP成为裁剪后的图像并上传到服务器?
文档位于github - cropperjs。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Cropper.js</title>
<!-- <link rel="stylesheet" href="dist/cropper.css"> -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/0.8.1/cropper.css" />
<style>
.container {
max-width: 640px;
margin: 20px auto;
}
img {
max-width: 100%;
}
</style>
</head>
<body>
<div class="container">
<h1>Cropper with a range of aspect ratio</h1>
<div>
<img id="image" src="https://fengyuanchen.github.io/cropperjs/images/picture.jpg" alt="Picture">
</div>
<button onclick="cropper.getCroppedCanvas()">Save</button>
</div>
<!-- <script src="dist/cropper.js"></script> -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/0.8.1/cropper.js"></script>
<script>
window.addEventListener('DOMContentLoaded', function () {
var image = document.querySelector('#image');
var minAspectRatio = 1.0;
var maxAspectRatio = 1.0;
var cropper = new Cropper(image, {
ready: function () {
var cropper = this.cropper;
var containerData = cropper.getContainerData();
var cropBoxData = cropper.getCropBoxData();
var aspectRatio = cropBoxData.width / cropBoxData.height;
var newCropBoxWidth;
if (aspectRatio < minAspectRatio || aspectRatio > maxAspectRatio) {
newCropBoxWidth = cropBoxData.height * ((minAspectRatio + maxAspectRatio) / 2);
cropper.setCropBoxData({
left: (containerData.width - newCropBoxWidth) / 2,
width: newCropBoxWidth
});
}
},
cropmove: function () {
var cropper = this.cropper;
var cropBoxData = cropper.getCropBoxData();
var aspectRatio = cropBoxData.width / cropBoxData.height;
if (aspectRatio < minAspectRatio) {
cropper.setCropBoxData({
width: cropBoxData.height * minAspectRatio
});
} else if (aspectRatio > maxAspectRatio) {
cropper.setCropBoxData({
width: cropBoxData.height * maxAspectRatio
});
}
}
});
});
</script>
<!-- FULL DOCUMENTATION ON https://github.com/fengyuanchen/cropperjs -->
<!-- My question is: How do i get the cropped image and upload via php ? -->
</body>
</html>
&#13;
答案 0 :(得分:1)
点击保存按钮后如何裁剪和上传? ,如何让php获取裁剪后的图像并上传到服务器?
在the readme中,方法getCroppedCanvas()的说明)提及上传裁剪的图片:
之后,您可以直接将画布显示为图像,或使用HTMLCanvasElement.toDataURL获取数据URL,或使用HTMLCanvasElement.toBlob获取blob并使用FormData将其上载到服务器如果浏览器支持这些API。 1
cropper.getCroppedCanvas().toBlob(function (blob) {
var formData = new FormData();
formData.append('croppedImage', blob);
// Use `jQuery.ajax` method
$.ajax('/path/to/upload', {
method: "POST",
data: formData,
processData: false,
contentType: false,
success: function () {
console.log('Upload success');
},
error: function () {
console.log('Upload error');
}
});
});
因此,对于您的示例,标有 save 的按钮引用了 cropper ,但这只是在加载DOM的回调的回调中定义的(即window.addEventListener('DOMContentLoaded', function () {
) 。我建议使用一个事件委托(参见下面提到的示例plunker)但如果你想引用 cropper ,则需要在DOM加载的回调之外声明它。
var cropper;
window.addEventListener('DOMContentLoaded', function () {
//assign cropper:
cropper = new Cropper(image, { ...
您可以在this plunker中看到它的实际效果。它使用的PHP代码仅获取上传的裁剪图像并返回base64编码版本(使用base64_encode())。
下面列出了plunker示例中使用的PHP代码:
<?php
$output = array();
if(isset($_FILES) && is_array($_FILES) && count($_FILES)) {
$output['FILES'] = $_FILES;
//this is where the cropped image could be saved on the server
$output['uploaded'] = base64_encode(file_get_contents($_FILES['croppedImage']['tmp_name']));
}
header('Content-Type: application/json');
echo json_encode($output);
不仅可以回显文件的base64编码版本,还可以使用move_uploaded_file()上传文件,然后返回有关上传文件的信息(例如文件ID,路径等)。
move_uploaded_file($_FILES['croppedImage']['tmp_name'], '/path/to/save/cropped/image');
1 <子>(https://github.com/fengyuanchen/cropperjs#user-content-getcroppedcanvasoptions)子>