Failed to upload picked image from gallery to php server - php

Question

I'm using PHP for a project that needs to be able to upload images from a gallery. For now I'm trying this:
I'm trying to pick image from gallery using httpClient and upload it to php serve. What works from is - pick image, convert mediafile to base64, but when it comes to php it recieves image file but doesn't add it to folder and always returns failed upload.
Where am I mistaken?
Here is my code:
private async void browse_image(object sender, EventArgs e)
{
await CrossMedia.Current.Initialize();
var file = await CrossMedia.Current.PickPhotoAsync();
MF = file;
if (file == null)
return;
string[] stringSeparators = new string[] { "." };
var result = file.Path.Split(stringSeparators, StringSplitOptions.None);
img_path.Text = u.Username + code.Text + "." + result[1];
var stream = file.GetStream();
profile.Source = ImageSource.FromStream(() =>
{
return stream;
});
}
public bool convert_image_to64(){
var stream = MF.GetStream();
byte[] filebytearray = new byte[stream.Length];
stream.Read(filebytearray, 0, (int)stream.Length);
base64 = Convert.ToBase64String(filebytearray);
if(String.IsNullOrEmpty(base64)){
return false;
}
return true;
}
async Task upload_profile_page()
{
try
{
string result = "";
var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("image", base64));
postData.Add(new KeyValuePair<string, string>("filename", img_path.Text));
var stringPayload = JsonConvert.SerializeObject(postData);
var content = new StringContent(stringPayload, Encoding.UTF8, "application/json");
await DisplayAlert("", content.ToString(), "ok");
HttpClient client = new HttpClient();
var response = await client.PostAsync("http://example.com/upload_app.php", content);
var FinalJSonResult =. (JArray)JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);
if (FinalJSonResult.Count > 0)
{
var j = (JObject)FinalJSonResult[0];
result = j.GetValue("result").ToString();
if (result.Equals("0"))
{
await DisplayAlert("0 ->", "failed to upload", "ok");
}
else if (result.Equals("1"))
{
await DisplayAlert("1 ->", "uploaded image successffully", "ok");
}
else
{
await DisplayAlert("1 ->", result, "ok");
}
}
else
{
await DisplayAlert("Error", "Empty result" + "\n" + "size of returned array:- " + FinalJSonResult.Count.ToString(), "Ok");
}
}
catch (Exception ex)
{
await DisplayAlert("Error", ex.ToString(), "Ok");
return;
}
}
<?php // read JSon input
$data_back = json_decode(file_get_contents('php://input'));
// set json string to php variables
$base = $data_back->{"image"};
$filename = $data_back->{"filename"};
$binary=base64_decode($base);
$result1 = array();
header("Content-type: application/json");
try{ // Decode Image
$binary=base64_decode($base);
header('Content-Type: bitmap; charset=utf-8');
$result1 = array();
// Images will be saved under '.../uplodedimages' folder
$file = fopen('.../uplodedimages/'.$filename, 'wb');
// Create File
if(fwrite($file, $binary)==false){
array_push($result1,array( 'result'=>"0"));
}else{
$result1 = array();
array_push($result1,array( 'result'=>"1"));
}
fclose($file);
}catch(Exception $e) {
array_push($result1,array( 'result'=>$e));
}
echo json_encode($result1,JSON_UNESCAPED_UNICODE);
?>