php + ajax非同步上傳檔案 阿星小棧
阿新 • • 發佈：2018-11-15
html程式碼
<head>
<script src="/libs/jQuery/jquery-2.2.4.min.js"></script>
<script>
var url = "{{ url('/admin/test/upload') }}";
$(function () {
$("#upload").click(function () {
$("#imgWait").show();
var formData = new FormData();
formData.append("file", document.getElementById("file1").files[0]);
$.ajax({
url: url,
type: "POST",
data: formData,
/**
*必須false才會自動加上正確的Content-Type
*/
contentType: false,
/**
* 必須false才會避開jQuery對 formdata 的預設處理
* XMLHttpRequest會對 formdata 進行正確的處理
*/
processData: false,
success: function (data) {
if (data.status == "true") {
alert("上傳成功！");
}
if (data.status == "error") {
alert(data.msg);
}
$("#imgWait").hide();
},
error: function () {
alert("上傳失敗！");
}
});
});
});
</script>
</head>
<body>
選擇檔案:<input type="file" id="file1" onchange="uploadFile(this)"/><br />
<input type="button" id="upload" value="上傳" />
<img id="preview" src=""/>
PHP程式碼
public function upload(Request $request){ if (file_exists("upload/" . $_FILES["file"]["name"])) { echo $_FILES["file"]["name"] . " already exists. "; } else { $url = "upload/" . time() .rand(1, 10000).'.'.pathinfo($_FILES["file"]["name"])['extension']; move_uploaded_file($_FILES["file"]["tmp_name"], $url); } return $this->success([ 'url'=>$url ]); }
function uploadFile(ev){ var that = this; const file = document.getElementById('file1'); const fileObj = file.files[0]; const windowURL = window.URL || window.webkitURL; const img = document.getElementById('preview'); if(file && fileObj) { const dataURl= windowURL.createObjectURL(fileObj); img.setAttribute('src',dataURl); } }