php实现粘贴截图并完成上传功能

//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);