Views exposed filter by x days

My view currently looks like:

$view = new view;
$view->name = 'jobsearch_advanced';
$view->description = '';
$view->tag = '';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = FALSE;
$view->api_version = 2;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->override_option('fields', array(
  'title' => array(
    'label' => '',
    'alter' => array(
      'alter_text' => 0,
      'text' => '',
      'make_link' => 0,
      'path' => '',
      'link_class' => '',
      'alt' => '',
      'prefix' => '',
      'suffix' => '',
      'target' => '',
      'help' => '',
      'trim' => 0,
      'max_length' => '',
      'word_boundary' => 1,
      'ellipsis' => 1,
      'html' => 0,
      'strip_tags' => 0,
    ),
    'empty' => '',
    'hide_empty' => 0,
    'empty_zero' => 0,
    'link_to_node' => 1,
    'exclude' => 0,
    'id' => 'title',
    'table' => 'node',
    'field' => 'title',
    'relationship' => 'none',
  ),
));
$handler->override_option('sorts', array(
  'field_post_date_value' => array(
    'order' => 'DESC',
    'delta' => -1,
    'id' => 'field_post_date_value',
    'table' => 'node_data_field_post_date',
    'field' => 'field_post_date_value',
    'relationship' => 'none',
  ),
));
$handler->override_option('arguments', array(
  'field_post_date_value' => array(
    'id' => 'field_post_date_value',
    'table' => 'node_data_field_post_date',
    'field' => 'field_post_date_value',
  ),
));
$handler->override_option('filters', array(
  'status' => array(
    'operator' => '=',
    'value' => '1',
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'status',
    'table' => 'node',
    'field' => 'status',
    'relationship' => 'none',
  ),
  'type' => array(
    'operator' => 'in',
    'value' => array(
      'jobs' => 'jobs',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'type',
    'table' => 'node',
    'field' => 'type',
    'relationship' => 'none',
  ),
  'field_post_date_value' => array(
    'operator' => '<=',
    'value' => array(
      'value' => NULL,
      'min' => NULL,
      'max' => NULL,
      'default_date' => 'now',
      'default_to_date' => '',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'date_fields' => array(
      'node_data_field_post_date.field_post_date_value' => 'node_data_field_post_date.field_post_date_value',
    ),
    'date_method' => 'OR',
    'granularity' => 'day',
    'form_type' => 'date_select',
    'default_date' => 'now',
    'default_to_date' => '',
    'year_range' => '-3:+3',
    'id' => 'field_post_date_value',
    'table' => 'node_data_field_post_date',
    'field' => 'field_post_date_value',
    'relationship' => 'none',
  ),
  'field_job_location_value_many_to_one' => array(
    'operator' => 'or',
    'value' => array(),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'field_job_location_value_many_to_one_op',
      'identifier' => 'field_job_location_value_many_to_one',
      'label' => 'Location',
      'optional' => 1,
      'single' => 1,
      'remember' => 0,
      'reduce' => 0,
      'vfs_selective' => 1,
      'vfs_active' => 0,
    ),
    'id' => 'field_job_location_value_many_to_one',
    'table' => 'node_data_field_job_location',
    'field' => 'field_job_location_value_many_to_one',
    'relationship' => 'none',
    'reduce_duplicates' => 0,
  ),
  'field_job_salary_b_value_many_to_one_1' => array(
    'operator' => 'or',
    'value' => array(),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'field_job_salary_b_value_many_to_one_1_op',
      'identifier' => 'field_job_salary_b_value_many_to_one_1',
      'label' => 'Salary',
      'optional' => 1,
      'single' => 1,
      'remember' => 0,
      'reduce' => 0,
      'vfs_selective' => 1,
      'vfs_active' => 0,
    ),
    'id' => 'field_job_salary_b_value_many_to_one_1',
    'table' => 'node_data_field_job_salary_b',
    'field' => 'field_job_salary_b_value_many_to_one',
    'relationship' => 'none',
    'reduce_duplicates' => 0,
  ),
  'name' => array(
    'operator' => 'word',
    'value' => '',
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'name_op',
      'identifier' => 'name',
      'label' => 'Keywords',
      'optional' => 1,
      'remember' => 0,
    ),
    'case' => 1,
    'id' => 'name',
    'table' => 'term_data',
    'field' => 'name',
    'relationship' => 'none',
  ),
  'field_job_sector_value_many_to_one_1' => array(
    'operator' => 'or',
    'value' => array(),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'field_job_sector_value_many_to_one_1_op',
      'identifier' => 'field_job_sector_value_many_to_one_1',
      'label' => 'Sector',
      'optional' => 1,
      'single' => 1,
      'remember' => 0,
      'reduce' => 0,
      'vfs_selective' => 1,
      'vfs_active' => 0,
    ),
    'id' => 'field_job_sector_value_many_to_one_1',
    'table' => 'node_data_field_job_sector',
    'field' => 'field_job_sector_value_many_to_one',
    'relationship' => 'none',
    'reduce_duplicates' => 0,
  ),
  'field_job_type_value_many_to_one' => array(
    'operator' => 'or',
    'value' => array(),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'field_job_type_value_many_to_one_op',
      'identifier' => 'field_job_type_value_many_to_one',
      'label' => 'Contract',
      'optional' => 1,
      'single' => 1,
      'remember' => 0,
      'reduce' => 0,
      'vfs_selective' => 1,
      'vfs_active' => 0,
    ),
    'id' => 'field_job_type_value_many_to_one',
    'table' => 'node_data_field_job_type',
    'field' => 'field_job_type_value_many_to_one',
    'relationship' => 'none',
    'reduce_duplicates' => 0,
  ),
  'field_post_date_value_1' => array(
    'operator' => '=',
    'value' => array(
      'min' => '2011-01-01 00:00:00',
      'max' => '2011-01-01 00:00:00',
      'value' => '2011-01-01 00:00:00',
      'default_date' => '',
      'default_to_date' => '',
    ),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'operator' => 'field_post_date_value_1_op',
      'label' => 'Posted in the last',
      'use_operator' => 0,
      'identifier' => 'field_post_date_value_1',
      'optional' => 1,
      'remember' => 0,
    ),
    'date_fields' => array(
      'node_data_field_post_date.field_post_date_value' => 'node_data_field_post_date.field_post_date_value',
    ),
    'date_method' => 'OR',
    'granularity' => 'day',
    'form_type' => 'date_select',
    'default_date' => '',
    'default_to_date' => '',
    'year_range' => '-1:+1',
    'id' => 'field_post_date_value_1',
    'table' => 'node_data_field_post_date',
    'field' => 'field_post_date_value',
    'relationship' => 'none',
  ),
));
$handler->override_option('access', array(
  'type' => 'none',
));
$handler->override_option('cache', array(
  'type' => 'none',
));
$handler->override_option('title', 'Jobs');
$handler->override_option('items_per_page', 0);
$handler->override_option('pager_element', 16);
$handler->override_option('exposed_block', TRUE);
$handler = $view->new_display('page', 'Page', 'page_1');
$handler->override_option('path', 'jobs/advanced');
$handler->override_option('menu', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => 0,
  'name' => 'navigation',
));
$handler->override_option('tab_options', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => 0,
  'name' => 'navigation',
));