Get value of multiple hidden form values, within a table - php

Question

I ve been trying to obtain the value of my form input elements, but I am just not having any luck with it.
I have the following form within a while loop in PHP, so there will be multiple forms.
<form method='POST' action=".$_SERVER['SCRIPT_NAME']." name='form_set_deadline' class='form_set_deadline'>
<input type='hidden' value='".$data3['unique_name']."' name='file_id' class='file_id' />
<input type='hidden' value='".$user_id."' name='client_id' class='client_id' />
<table>
<tr>
<td align='left'><input type='button' name='set_file_options' value='Submit' class='set_file_options' /></td>
</tr>
</table>
</form>
Now, I am trying to get the value of the hidden fields of jquery, but just don't know how to access the hidden field values. Remember, there are multiple of these forms on the page. Here is the jquery form, contained within a function.
function setFileOptions(){
$('.set_file_options').each(function(e){
$(this).unbind("click").click(function(e){
e.preventDefault();
//set form variables
var file_id = // DON'T KNOW HOW TO GET THE HIDDEN FIELD INPUT VALUE?
alert(file_id);
}); //END THIS CLICK FUNCTION
});
} //END MAIN FUNCTION
Thanks for the help/tips!
So after all the input received from you all, I have decided to use the following to get all the form data:
var form_data = $(this).closest('form').serialize();
Thanks again!

Answer 1

var file_id = $(this).closest('form').find('.file_id').val();
Alternatively, a pure JS solution:
var file_id = this.form.elements['form_id'].value;
A selector to select all <input type="hidden"/> elements:
var hiddens = $(this).closest('form').find(':hidden');
//hiddens.eq(0) = file_id
//hiddens.eq(1) = client_id
If you do not have anything attached to your classnames, I recommend to drop these attributes, and use the name-attribute selector:
var file_id = $(this).closest('form').find('[name="file_id"]').val();

Answer 2

Try this,
$(this).closest('form').find(':hidden'); //should get you the hidden fields inside the form
And there could be more than one fields so you may need iterate to get all the hidden fields,
var field_val = [];
$.each ($(this).closest('form').find(':hidden'), function (index) {
field_val [$(this).attr('class')] = $(this).val();
});

Answer 3

var file_id = $(this).closest('table').siblings('.file_id').val()

Answer 4

Have you tried:
var file_id = $('input[name="file_id"]').val();

Answer 5

Try this:
var fileid = $(this).parents('form').find('.file_id').val();