don't get POST variables after submit Multipart/form-data - php

Question

A part on my page is responsible for multiple picture uploads, it worked for a while but it is not working anymore.
I'm using a WampServer Version 3.1.7 64bit and testing on localhost.
I have tried accepting and sending datas via ajax instead of html submit, but i didn't get datas on php side either, but on client side i had all datas before sending ( FormData() ).
HTML part:
<div class="div_shadow_here">
<form id="gallery_data" method="post" enctype="multipart/form-data">
<input type="hidden" name="formid" value="<?php echo $_SESSION[" formid "]; ?>" />
<table class="news_table">
<tr>
<td>
<p class="name_col">Gallery name:</p>
</td>
<td>
<input class="input_news" id="gallery_title" type="text" name="gallery_title" />
</td>
</tr>
<tr>
<td>
<p class="name_col">Picture(s):</p>
</td>
<td>
<input class="input_news" id="news_picture_path" type="file" name="picture_path[]" multiple />
<label id="label_for_input" for="picture_path">Select picture(s)</label><span id="uploadState"></span>
</td>
</tr>
<tr>
<td></td>
<td>
<div id="img_container"></div>
</td>
</tr>
</table>
<button class="print_button hidden_a" type="submit" name="login" id="save_news" form="gallery_data">Save</button>
</form>
</div>
PHP part for testing:
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
echo '<script>console.log("Not empty")</script>';
if (isset($_POST['formid'])) {
echo '<script>console.log("'.$_POST['formid'].
'")</script>';
}
if (isset($_POST['gallery_title'])) {
echo '<script>console.log("'.$_POST['gallery_title'].
'")</script>';
}
if (isset($_FILES['picture_path']['name'])) {
echo '<script>console.log("'.count($_FILES['picture_path']['name']).
'")</script>';
}
} else {
echo '<script>console.log("Empty")</script>';
}
I get Notice: Undefined index: gallery_title.. errors without isset($_POST['gallery_title']) testing (same for all other input fields).
Ajax for testing:
$('body').on('click', '#save_news', function(e) {
e.preventDefault();
var formData = new FormData($(this).parents('form')[0]);
for (var key of formData.keys()) {
console.log(key);
}
for (var value of formData.values()) {
console.log(value);
}
$.ajax({
url: 'galleryupload.php',
type: 'POST',
success: function(data) {
alert("Data Uploaded: " + data);
},
data: formData,
cache: false,
contentType: false,
processData: false
});
return false;
});