PHP realizes pasting screenshots and completing the upload function, PHP paste screenshots and upload_PHP tutorial

<&#63;php
header("Access-Control-Allow-Origin:*");
$url = 'http://'.$_SERVER['HTTP_HOST'];
$file = (isset($_POST["file"])) &#63; $_POST["file"] : '';
if($file)
{
$data = base64_decode(str_replace('data:image/png;base64,', '', $file)); //截图得到的只能是png格式图片，所以只要处理png就行了
$name = md5(time()) . '.png'; // 这里把文件名做了md5处理
file_put_contents($name, $data);
echo"$url/$name";
die;
}
&#63;>


<div id="box"style="width:400px;height:400px;border:1px solid;"contenteditable>
</div>
<input type="hidden"name="img"value=""id="img_puth"/>

<script>
//查找box元素,检测当粘贴时候,
document.querySelector('#box').addEventListener('paste', function(e) {

//判断是否是粘贴图片
 if (e.clipboardData && e.clipboardData.items[0].type.indexOf('image') > -1) 
{
var that = this,
reader = new FileReader();
file = e.clipboardData.items[0].getAsFile();

//ajax上传图片
 reader.onload = function(e) 
{
 var xhr = new XMLHttpRequest(),
 fd = new FormData();

 xhr.open('POST', '', true);
 xhr.onload = function () 
{
 var img = new Image();
 img.src = xhr.responseText;

 // that.innerHTML = '<img src="'+img.src+'"alt=""/>';
 document.getElementById("img_puth").value = img.src;
}

 // this.result得到图片的base64 (可以用作即时显示)
 fd.append('file', this.result); 
 that.innerHTML = '<img src="'+this.result+'"alt=""/>';
xhr.send(fd);
}
reader.readAsDataURL(file);
}
}, false);
</script>