Ajax and PHP implement asynchronous uploading of avatars
This article mainly shares with you examples of asynchronous uploading of avatars using Ajax and PHP. I hope it can help you.
Effect screenshot:
Upload page
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head>
<body>
头像:<img id="avatar" src="" height="35" width="35" alt=""><br />
选择文件:<input type="file" id="file1" /><br />
<input type="button" id="upload" value="上传" /> <span id="result"></span>
<img src="5fd411e985d2c939b90e2dfb.gif" height="100" width="100" style="display:none" id="imgWait" />
<script src="jquery-1.11.2.min.js"></script>
<script>
$(function () {
$("#upload").click(function () {
$("#imgWait").show();
var formData = new FormData();
formData.append("myfile", document.getElementById("file1").files[0]);
$.ajax({
url: "upload.php",
type: "POST",
dataType: 'json',
data: formData,
/**
*必须false才会自动加上正确的Content-Type,否则会执行error步骤
*/
contentType: false,
/**
* 必须false才会避开jQuery对 formdata 的默认处理，否则会报Uncaught TypeError: Illegal invocation
* XMLHttpRequest会对 formdata 进行正确的处理
*/
processData: false,
success: function (data) {
if(data.code == 200){
$('#avatar').attr('src',data.datas.filename);
}
$('#result').html(data.msg);
$("#imgWait").hide();
setTimeout(function(){
$('#result').html('');
}, 1200);
},
error: function () {
alert("上传失败！");
$("#imgWait").hide();
}
});
});
});
</script>
</body>
</html>Backend code:
<?php
$tmp_name = $_FILES['myfile']['tmp_name'];
$current_time = date("Y-m-d H-i-s");
if(is_uploaded_file($tmp_name)){
$filename = './'.$current_time.'.jpg';
$return = move_uploaded_file($tmp_name,$filename);
$return ? output('200','上传成功！',['filename' => $filename]) : output('400','上传失败！');
}else{
output('555','非法文件！');
}
function output($code,$msg,$datas = array()){
$outputData = array(
'code' => $code,
'msg' => $msg,
'datas' => $datas
);
exit(json_encode($outputData));
}Related recommendations:
angularjs uses $http to asynchronously upload Excel file method sharing
How to implement asynchronous file upload in html
php and ajax implement asynchronous uploading of files or image code sharing
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