我正在尝试构建一个配置文件上传系统。用户将上传图片,在提交图片之前,他们将有机会裁剪图片。我使用的是cropbox图像作物插件,我也使用jQuery验证插件。提交后,图像将以全尺寸裁剪,然后重新调整为250像素×250像素。这里是我有HTML和jQuery明智的jsfiddle。图像没有裁剪或调整大小
HTML
<form class="avatar_form" action="" method="POST" enctype="multipart/form-data">
<input id="avatar" style="display: block; margin-top: 20px" type="file" name="avatar">
<input type="hidden" name="width">
<input type="hidden" name="height">
<input type="hidden" name="yValue">
<input type="hidden" name="xValue">
<div id="stage"></div>
<input id="upload-btn" type="submit" value="Update profile picture" name="upload">
</form>
jQuery的
$(".avatar_form").validate({
errorElement: 'div',
rules: {
avatar: {
required: true,
extension: "jpg|png|jpeg|JPG|PNG|JPEG",
filesize: 100000000,
minImageSize: {
width: 250,
height: 250
}
},
},
messages: {
avatar: {
required: "You have to provide an image.",
extension: "We only accept .jpg and .png images.",
filesize: "Your image size should not exceed 100KB",
minImageSize: "Your image must be at least 250px by 250px."
},
},
});
var $form = $('.avatar_form'),
$upload_btn = $form.find('upload-btn');
$form.find('#avatar').change(function() {
var $avatar = $(this),
$imgBox = $("#stage");
$avatar.removeData('imageSize');
$imgBox.hide().empty();
var file = this.files[0];
if (file.type.match(/image\/.*/)) {
$upload_btn.attr('disabled', true);
var reader = new FileReader();
reader.onload = function() {
var $img = $('<img />').attr({
src: reader.result
});
$img.on('load', function() {
$imgBox.append($img).show();
$avatar.data('imageSize', {
width: $img.width(),
height: $img.height()
});
$img.css({
display: "none"
});
$upload_btn.attr('disabled', false);
validator.element($avatar);
});
}
reader.readAsDataURL(file);
} else {
validator.element($avatar);
}
});
$(function() {
$("#avatar").on('change', function() {
var file = this.files[0];
var reader = new FileReader();
reader.onload = function() {
var $img = $('<img />').attr({
src: reader.result
});
$img.on('load', function() {
$img.cropbox({
width: 250,
height: 250
}).on('cropbox', function(event, results, img) {
$(".width").val(results.cropW);
$(".height").val(results.cropH);
$(".yvalue").val(results.cropY);
$(".xvalue").val(results.cropX);
});
});
$('#stage').append($img);
};
reader.readAsDataURL(file);
});
});
$.validator.addMethod('filesize', function(value, element, param) {
return this.optional(element) || (element.files[0].size <= param)
}, 'File size must be less than {0}');
$.validator.addMethod('minImageSize', function(value, element, minSize) {
var imageSize = $(element).data('imageSize');
return (imageSize) && (imageSize.width >= minSize.width) && (imageSize.height >= minSize.height);
}, function(minSize, element) {
return ($(element).data('imageSize')) ? ("Your image's size must be at least " + minSize.width + "px by " + minSize.height + "px") : "Selected file is not an image.";
});
PHP
if(isset($_FILES["avatar"], $_POST["width"], $_POST["height"], $_POST["xValue"], $_POST["yValue"]))
{
$name = $_FILES["avatar"]["name"];
$temp_name = $_FILES["avatar"]["tmp_name"];
$nameExt = explode('.',$name);
$nameExtension = $nameExt[1];
$name = $_SESSION["id"] . "." . $nameExtension;
$target_avatar_file = $_SERVER['DOCUMENT_ROOT'] . "/profiles/images/avatars/$name";
$xValue = $_POST["xValue"];
$yValue = $_POST["yValue"];
$image = new Imagick($temp_name);
$image->cropImage($_POST["width"], $_POST["height"], $xValue, $yValue);
$image->resizeImage(250,250, imagick::FILTER_LANCZOS, 1, true);
$image->writeImage($target_avatar_file);
$username = $_SESSION["Username"];
$query_file = "/profiles/images/avatars/$name";
$db->query("UPDATE Users SET image = '$query_file' WHERE Username = '$username'");
}
的jQuery验证部分工作正常,但什么不是PHP的一部分。一旦用户提交图像,它将被裁剪,调整大小,然后移动到我的服务器。将文件移动到服务器可以正常工作,但裁剪图像和调整大小无法正常工作。当我上传图片时,图片被重新调整为250px×167px,并且出于某种原因没有正确裁剪。我究竟做错了什么?
我需要这条线的原因是,因为cropImage(...)只会裁剪图像。例如,Ajax会将宽度,高度,x和y坐标传递给PHP,但被传递的宽度和高度并不是实际显示给用户的宽度和高度,实际上它要大得多。获得中继的宽度和高度将大于250像素250像素。 – user2896120
这些值至少形成一个正方形吗? – Jacob
这些值与图像相同。如果我上传一张600 x 400的图片,$ _POST [“width”]将会是600,而$ _POST [“height”]将会是400以及我看到的 – user2896120