php - Get value from all checked checkboxes and insert them into MySQL

Question

Here is my HTML:

<input type="checkbox" class="CategoryInput[]" name="categories[]" category="1" value="1" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput1" subcategory="2" value="2" clicked="0">
<input type="checkbox" class="CategoryInput[]" name="categories[]" category="11" value="11" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="12" value="12" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="13" value="13" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="14" value="14" clicked="0">

My question is: How can i get the values for the checked checkboxes for CategoryInput[] and subcategory[] and combine them to look like that:

$SelectedCheckBoxValues = "1, 3, 4, 6, 2, 7, 3";

Then i have to insert them into MySQL, i know how can i do that, but i need to achieve the variable $SelectedCheckBoxValues .

Can you help me out with that.

Thanks in advance!

Answer 1

 <form action="handler.php" method="get">
 <input type="checkbox" class="CategoryInput[]" name="categories[]" category="1" value="1" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput1" subcategory="2" value="2" clicked="0">
<input type="checkbox" class="CategoryInput[]" name="categories[]" category="11" value="11" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="12" value="12" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="13" value="13" clicked="0">
<input type="checkbox" name="subcategory[]" class="SubCategoryInput11" subcategory="14" value="14" clicked="0">
<input type="submit" value="submit">
</form>

handler.php

   $values = $_GET['subcategory'];

   foreach ($values as $subcategory){
  //do something

   }