<img src="" style="width: 120px;margin-bottom: 5px" id="previewimg0">
<form action="" enctype="multipart/form-data" id="form0">
<input type="file" name="file" id="file0" onChange="preview(this,0)" style="width: 70px;margin-left: 25px">
</form>
function preview(obj,id){
var img = document.getElementById("previewimg"+id);
img.src = window.URL.createObjectURL(obj.files[0]);
var data = new FormData($('#form'+id)[0]);
$.ajax({
url: 'uploadoption.php',
type: 'POST',
data: data,
dataType: 'JSON',
cache: false,
processData: false,
contentType: false
}).done(function(ret){
if(ret['isSuccess']){
img.src = window.URL.createObjectURL(obj.files[0]);
}else{
alert('提交失敗');
}
});
}
<?php
$file = $_FILES['file'];//得到传输的数据
$Name = $file['name'];//得到文件名称
$type = strtolower(substr($Name,strrpos($Name,'.')+1));//得到文件类型。转为小写
$allow_type = array('jpg','jpeg','gif','png');//定义允许上传的类型
//判断文件类型是否允许上传
if(!in_array($type,$allow_type)){
//如果不允许,直接停止
return;
}
//判读是否通过http post上传
if(!is_uploaded_file($file['tmp_name'])){
return;
}
$upload_path = "image/";//上传文件的存放路径
//开始移动文件到相应的文件夹
if(move_uploaded_file($file['tmp_name'],$upload_path.$file['name'])){
$response['isSuccess'] = true;
$response['photo'] = $upload_path.$file['name'];
}else{
$response['isSuccess'] = false;
}
//$picture = $upload_path.$file['name'];
echo json_encode($response);