javascript代码:
<html><head><meta charset="UTF-8">
<style>
img{
max-width:80%;
display:block;
}
</style>
</head><body><input id="img" type="file">
<p id="text"></p>
<script>
var
up=function(o,success,x,file){
if(typeof success=='function')
file=o;
x=new XMLHttpRequest()
x.open('POST','http://127.0.0.1/up.php?r='+Math.random(),1)
x.onload=function(r){
r=x.responseText
if(success)//if r.pid and the twice parameter existing
return success(r)
}
x.send(file)
}
</script>
<script>
img.onchange=function(){
if(!this.files||!this.files[0])
return alert('选取文件出错!')
var
imgfile=this.files[0]
if(imgfile.type.indexOf('image')!=0)
return alert('这不是一个图像或音频!')
up(imgfile,function(r){
text.innerHTML=r
})
}
</script>
</body>
</html>
后台代码:
<?php
header('Access-Control-Allow-Origin:*');
header("Content-Type:text/json;charset=utf-8");
echo json_encode($_FILES);
?>
返回数据为[]
异步上传文件,应使用FormData
。例如:
var oMyForm = new FormData();
oMyForm.append("file", file);
x.send(oMyForm);
参考地址:http://www.cnblogs.com/lhb25/...