There are several checkboxes belonging to the name Category and giving different values. How can I write the values of all selected checkboxes in a string, separated by commas?
<span> <div><input type="checkbox" name="category" value="men">men</div> <div><input type="checkbox" name="category" value="female">female</div> <div><input type="checkbox" name="category" value="a1">a1</div> <div><input type="checkbox" name="category" value="a2">a2</div> </span>