Send Image with Ajax to database (php) without reloading [duplicate]

问题

I create a bootstrap modal popup form to add picture in gallery page, I developed the php & ajax code because i want without page reloading here :-

the problem is when I want to send image to database I show this error

Notice: Undefined index: photo in ....

I can't send image.

this's my ajax code

$(function() {
  //twitter bootstrap script
  $("button#submit").click(function(){
   	$.ajax({
      type: "POST",
	  url: "image.php",
	  data: $('form.contact').serialize(),
	  success: function(msg){
		  $("#thanks").html(msg)
         	$("#myModal").modal('hide');
	        },
		error: function(){
			alert("failure");
			}
		});
	});
});

And this's Image.php file

include 'db.php';

if(isset($_POST['titre'])){
	$titre = strip_tags($_POST['titre']);

	$image_name = $_FILES['photo']['name'];
	$image_tmp = $_FILES['photo']['tmp_name'];
	$image_size = $_FILES['photo']['size'];
	$image_ext = pathinfo($image_name, PATHINFO_EXTENSION);
	$image_path = '../images/'.$image_name;
	$image_db_path = 'images/'.$image_name;

  if($image_size < 1000000000){
    if($image_ext == 'jpg' || $image_ext == 'png' || $image_ext = 'gif'){
	if(move_uploaded_file($image_tmp,$image_path)){
	$ins_sql = "INSERT INTO media (Images_md, Id_Pro, Value, Title) VALUES ('$image_db_path', '0', 'galerie', '$titre')";
		if(mysqli_query($conn,$ins_sql)){
			echo '<div class="alert alert-success alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"> × </button>
Success! Well done its submitted. </div>';
			}else {
				echo '
<div class="alert alert-danger alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"> × </button>
Error ! Change few things. </div>';
					}
				}else {
				echo '
<div class="alert alert-danger alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"> × </button>
Sorry, Image hos not been uploaded. </div>
				';
				}
			}
			else {
				echo '
<div class="alert alert-danger alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"> × </button>
Please Add a jpg OR png OR gif Image. </div>
				';
			}
  		}else {
				echo '
<div class="alert alert-danger alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"> × </button>
Image File Size is much bigger then Expect. </div>
				';
			}
}

and this's myModal code :

<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">&times;</button>
<h4 class="modal-title">Ajouter Photo</h4>
</div>
<div class="modal-body">
<form class="contact">
<div class="form-group">
<label  class="col-sm-2 control-label" for="inputEmail3">Titre</label>
<div class="col-sm-10">
<input type="text" name="titre" class="form-control" placeholder="Titre"/>
</div>
</div>
<br><br>
<div class="form-group">
<label class="col-sm-2 control-label"					 for="inputEmail3">Photo</label>
<div class="col-sm-10">
<input type="file" name="photo" class="form-control" />
</div>
</div>
</form>
</div><br><br>
<div class="modal-footer">
<button class="btn btn-success" name="submit" id="submit">submit</button>
<a href="#" class="btn btn-default" data-dismiss="modal">Close</a>
</div>
</div>
</div>
</div>

Can you help me to send image with ajax jQuery?

回答1:

You need to make few changes in your AJAX script, such as:

Set the following options, processData: false and contentType: false in your AJAX request. From the documentation,

contentType (default: 'application/x-www-form-urlencoded; charset=UTF-8')
Type: Boolean or String
When sending data to the server, use this content type. Default is "application/x-www-form-urlencoded; charset=UTF-8", which is fine for most cases. If you explicitly pass in a content-type to $.ajax(), then it is always sent to the server (even if no data is sent). As of jQuery 1.6 you can pass false to tell jQuery to not set any content type header.

and

processData (default: true)
Type: Boolean
By default, data passed in to the data option as an object (technically, anything other than a string) will be processed and transformed into a query string, fitting to the default content-type "application/x-www-form-urlencoded". If you want to send a DOMDocument, or other non-processed data, set this option to false.
And if you're uploading file through AJAX, use FormData object. But keep in mind that old browsers don't support FormData object, FormData support starts from the following desktop browsers versions: IE 10+, Firefox 4.0+, Chrome 7+, Safari 5+, Opera 12+.

So change your jQuery script in the following way,

$(function(){
    //twitter bootstrap script
    $("button#submit").click(function(){
        $.ajax({
            type: "POST",
            url: "image.php",
            data: new FormData($('form')[0]),
            processData: false,
            contentType: false,
            success: function(msg){
                $("#thanks").html(msg)
                $("#myModal").modal('hide');
            },
            error: function(){
                alert("failure");
            }
        });
    });
});

来源：https://stackoverflow.com/questions/38112229/send-image-with-ajax-to-database-php-without-reloading

标签

javascript

php

jquery

ajax

bootstrap-modal