Using php inside wordpress

Topic edit:Using php inside javascript in wordpress

I have got the following code in a javascript file called custom.js:

            blabla = new Date(2014, 06 - 1, 2);
            $('.days').countdown({
            until: blabla,
            layout: '{dn} {dl}',

Code (markup):

1.Now i want a user to be able to change the above date. I have created a theme options page called theme-options.php

2.I am using <?php require_once('theme-options.php'); ?> in the functions.php to link to theme-options.php.

3.This is theme-options.php:

<?php
add_action('admin_menu', 'director_create_menu');
function director_create_menu() {
add_submenu_page( 'themes.php', ' Theme Options',
'Theme Options', 'administrator', __FILE__,
'director_settings_page');
add_action( 'admin_init', 'director_register_settings' );
}
function director_register_settings() {
register_setting( 'director-settings-group', 'director_date' );
}

div class="wrap">
  <h2>Theme Settings</h2>
  <form id="landingOptions" method="post" action="options.php">
    <?php settings_fields( 'director-settings-group' ); ?>
    <table class="form-table">
<tr valign="top">
          <th scope="row">Date:</th>
          <td>
            <input type="text" placeholder="2014, 06 - 1, 2" name="director_date"
            value="<?php print get_option('director_date');
            ?>" />
          </td>
        </tr>
<p class="submit">
        <input type="submit" class="button-primary" value="<?php _e('Save Changes') ?>" />
        </p>
      </form>
    </div>
    <?php } ?>

Code (markup):

Basically what is happening is that there is a theme options page.A user gives a date inside it. Now i want to use that date inside the javascript file.
If I had to use it inside index.php it would've been
<?php $date = get_option('director_date'); ?>
<?php if( $date ) : ?> <?php echo $date; ?><?php endif; ?>);. However this is javascript. How do i implement such an action here?

 

Hi sarahk the topic name was by mistake. It should've been "Using php inside javascript in wordpress".I am sorry about that i am new here and don't know how to edit the topic. Anyhow have a look at the edited question