[英]How to upload an image with AJAX and PHP?
I am trying to upload an image and insert to a database alongside the users details as a profile picture.我正在尝试上传图像并与用户详细信息一起作为个人资料图片插入数据库。 The output I currently get is {"current_field":null,"field_count":null,"lengths":null,"num_rows":null,"type":null} How can I solve this? The output I currently get is {"current_field":null,"field_count":null,"lengths":null,"num_rows":null,"type":null} How can I solve this? I have also tried to use local storage as this is for a Cordova application.我还尝试使用本地存储,因为这是针对 Cordova 应用程序的。 In the database I have 'Imagename' 'varchar(50)' null = yes在数据库中我有 'Imagename' 'varchar(50)' null = yes
HTML HTML
<img src="img/profilepic.png" alt="profilepic" style="width:200px;height:200px;">
<form id="imageForm" method="POST" enctype="multipart/form-data" class="imageform">
Select image to upload:
<input type="file" name="fileToUpload" id="fileToUpload">
<input type="submit" value="Upload Image" name="submit">
</form>
<p id="error" class="errormessage"></p>
<p id="image" class="imagemessage"></p>
JS JS
// When upload image button is clicked
$(document).ready(function() {
var imageform = $("#imageForm");
$("#imageForm").on('submit', function(event) {
event.preventDefault();
var imageValue = document.getElementById("fileToUpload").value;
//Set Local Store for Image
window.localStorage.setItem("fileToUpload", fileToUpload);
var imageform = new FormData(this);
var formData = new FormData($('#imageForm')[0]);
//Get Storage
var username = window.localStorage.getItem("username");
imageform.append('username', username);
var image = window.localStorage.getItem("fileToUpload");
//imageform.append('fileToUpload', fileToUpload);
// Call AJAX
$.ajax({
type: 'POST',
url: 'image.php',
data: imageform,
processData: false,
contentType: false,
success: function(data) {
if(data == "Success"){
document.getElementById("image").innerHTML = "Image Change Successful";
var image = window.localStorage.getItem("fileToUpload");
console.log(data);
} else {
console.log(data);
document.getElementById("error").innerHTML = "Error Uploading Image";
}
}
});
$("#fileToUpload").on("change", function() {
$("imageForm").submit();
});
});
});
PHP PHP
<?php
require_once('checklog.php');
require_once("functions.php");
require_once("db_connect.php");
$username = $_POST['username'];
$image = $_POST['fileToUpload'];
session_start();
if($_POST['submit'] == "Upload Image"){
$target_dir = "images/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
$message = "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
$message = "File is not an image.";
$uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
$message = "Sorry, file already exists.";
$uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
$message = "Sorry, your file is too large.";
$uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
$message = "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
$message = "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
$uploadedfilename= basename( $_FILES["fileToUpload"]["name"]);
$query = "UPDATE users SET imagename='$uploadedfilename' WHERE username='$username'";
mysqli_query($db_server, $query) or die("Insert failed. ". mysqli_error($db_server));
$message = "<strong>Image $uploadedimage upload successful!</strong>";
} else {
$message = "Sorry, there was an error uploading your file.";
}
}
}
$currentimagename = "profilepic.png";
$query="SELECT imagename FROM users WHERE username='$username'";
$result = mysqli_query($db_server, $query) or die("image load failed. ". mysqli_error($db_server));
if($row = mysqli_fetch_array($result)){
if($row['imagename']<>""){
$currentimagename = $row['imagename'];
}
}
mysqli_free_result($result);
echo $message;
echo json_encode($result);
?>
Hi I think this link will help you and one more change in your database you need to change your datatype is BLOB or varchar size php-ajax-image-upload嗨,我认为此链接将对您有所帮助,并且您需要更改数据类型的数据库中的另一项更改是 BLOB 或 varchar 大小php-ajax-image-upload
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