php+js实现图片的上传、裁剪、预览、提交示例-tutorial php-php.cn

php+js实现图片的上传、裁剪、预览、提交示例
高洛峰
Lepaskan： 2023-03-04 18:36:01
asal
2182 orang telah melayarinya
首先用到的语言是php、插件imgareaselect没有太多花哨的样式，index.php代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> 
<link rel="stylesheet" type="text/css" href="css/imgareaselect-default.css" /> 
<script type="text/javascript" src="scripts/jquery.min.js"></script> 
<script type="text/javascript" src="scripts/jquery.imgareaselect.pack.js"></script> 
<script type="text/javascript"> 
function preview(img, selection) { 
$(&#39;#selectbanner&#39;).data(&#39;x&#39;,selection.x1); 
$(&#39;#selectbanner&#39;).data(&#39;y&#39;,selection.y1); 
$(&#39;#selectbanner&#39;).data(&#39;w&#39;,selection.width); 
$(&#39;#selectbanner&#39;).data(&#39;h&#39;,selection.height); 

var scaleX = 100 / (selection.width || 1); 
var scaleY = 100 / (selection.height || 1); 
$(&#39;#ferret > img&#39;).css({ 
width: Math.round(scaleX * 512) + &#39;px&#39;,//512、390是你上传图片的宽高 
height: Math.round(scaleY * 390) + &#39;px&#39;, 
marginLeft: &#39;-&#39; + Math.round(scaleX * selection.x1) + &#39;px&#39;, 
marginTop: &#39;-&#39; + Math.round(scaleY * selection.y1) + &#39;px&#39; 
}); 
} 

//这里通过jQuery语法在原来图片后插入预览的小图片 
$(document).ready(function () { 
$(&#39;<div id="ferret"><img src="upload_pic/resized_pic.jpg" style="position: relative;" /><div>&#39;).css({ 
float: &#39;left&#39;, 
position: &#39;relative&#39;, 
overflow: &#39;hidden&#39;, 
width: &#39;100px&#39;, 
height: &#39;100px&#39; 
}) 

.insertAfter($(&#39;#selectbanner&#39;)); 

$(&#39;#selectbanner&#39;).imgAreaSelect({ 
selectionColor: &#39;blue&#39;, x1:0, y1:0, x2: 100,//初始位置 
maxWidth:500,y2:100, 
aspectRatio: &#39;1:1&#39;,//缩放比例 
selectionOpacity: 0.2 , 
onSelectEnd: preview //裁剪后执行的函数，在上面 
}); 
//确认裁剪 
$("#sliceButton").click(function() { 
var pic = $(&#39;#selectbanner&#39;).attr(&#39;src&#39;); 
// alert(pic); 
var x,y,w,h; 
$.post( 
"cat.php", //（2）将附上这个页面的代码 
{ 
x:$(&#39;#selectbanner&#39;).data(&#39;x&#39;), 
y:$(&#39;#selectbanner&#39;).data(&#39;y&#39;), 
w:$(&#39;#selectbanner&#39;).data(&#39;w&#39;), 
h:$(&#39;#selectbanner&#39;).data(&#39;h&#39;), 
pic:pic 
}, 
function(data){ 
// alert(data); 
//把裁剪后图片加载到#sure 
if(data){ 
$(&#39;#sure&#39;).attr(&#39;src&#39;,data); 
} 
} 
); 
}); 
}) 
</script> 
<title>图片裁剪、预览</title> 
</head> 
<body> 
<?php 
//上传图片后，把图片复制到upload文件夹下面 
if($_POST){ 
$photo = $_FILES[&#39;img&#39;][&#39;name&#39;]; 
$tmp_addr = $_FILES[&#39;img&#39;][&#39;tmp_name&#39;]; 

$path = &#39;upload/&#39;; 
$type=array("jpg","gif","jpeg","png"); 
$tool = substr(strrchr($photo,&#39;.&#39;),1); 
if(!in_array(strtolower($tool),$type)){ 
$text=implode(&#39;.&#39;,$type); 
echo "您只能上传以下类型文件: ",$text,"<br>"; 
}else{ 
$filename = explode(".",$photo); //把上传的文件名以"."好为准做一个数组。 
$time = date("m-d-H-i-s"); //取当前上传的时间 
$filename[0] = $time; //取文件名 
$name = implode(".",$filename); //上传后的文件名 
$uploadfile = $path.$name; 
$_SESSION[&#39;upfile&#39;] = $uploadfile;//上传后的文件名地址 
move_uploaded_file($tmp_addr,$uploadfile); 
} 
// echo $uploadfile; 
} 
?> 
<div id="s"> 
<!--上传图片--> 
<form action="" method="post" enctype="multipart/form-data"> 
<input type="file" id="img" name="img" value="" onclick=""/> 
<input name="submit" id="submit" type="submit" value="提交" class="submit"/> 
</form> 
<!--显示图片--> 
<? if(isset($_SESSION[&#39;upfile&#39;])){?> 
<img id="selectbanner" name="selectbanner" src="<? echo $_SESSION[&#39;upfile&#39;];?>" title="mypic"/> 
<? }?> 
</div> 
<!--确认裁剪--> 
<div><input type="submit" id="sliceButton" name="sliceButton" value="sliceButton"></div> 
<!--显示裁剪后的图片--> 
< div><img id="sure" src="" style="cursor:hand" /></div> 
</body> 
</html>
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