Site 1 - rotate pic function v1

<?php
/*
 * Functions file
 * Includes all necesary files
 *
 * @package custom
 */

function register_my_menus() {
  register_nav_menus(
    array(
      'primary-menu' => __( 'Primary Menu' ),
      'secondary-menu' => __( 'Secondary Menu' )
    )
  );
}
add_action( 'init', 'register_my_menus' );


function custom_widgets_init() {
    register_sidebar(
        array(
            'name' => 'Rotate Pics Sidebar',
            'id' => 'rotate_pics',
            'before_widget' => '<div>',
            'after_widget' => '</div>',
            'before_title' => '<h2 class="rounded">',
            'after_title' => '</h2>',
        )
    );

    register_sidebar(
        array(
            'name' => 'Articles Sidebar',
            'id' => 'articles',
            'before_widget' => '<div>',
            'after_widget' => '</div>',
            'before_title' => '<h2 class="rounded">',
        'after_title' => '</h2>',
        )
    );
}

// this function scans thru the directory received and loads the image file
// names into an array; Then returns a randome name to the caller
// If no directory is passed it will use the current dir

function  GetImageName($DirName)
    {
     $Img = array();  // define array

     // jpg
     foreach (glob("$DirName/*.jpg") as $filename)
     {
      if (is_readable($filename))
        $Img[]  = $filename;  // found image file
     }

     // png
     foreach (glob("$DirName/*.png") as $filename)
     {
      if (is_readable($filename))
        $Img[]  = $filename;  // found image file
     }

     // gif
     foreach (glob("$DirName/*.gif") as $filename)
     {
      if (is_readable($filename))
        $Img[]  = $filename;  // found image file
     }

         $Imgcount = sizeof($Img) - 1; // the index is zero-based
         if ($Imgcount <= 0)
           return "put here the name of one of the images as default, ex: pic1.jpg";
         else
         {
          $rand_image_ix = rand(0,$Imgcount);
          return $Img[$rand_image_ix];  // return name of image
         }
}


    // function to print the random image

function ShowRandomImg($size_x=300, $size_y=228)
    {
     $DirNm = "/wp-content/themes/custom/img/rotatepics";  // current directory
     if (is_front_page() || is_page('contact') )
     {
      $DirNm = $DirNm  . "/contact"
      $ImgNm = GetImageName($DirNm);  // retrieve random image from directory "contact"
     }
     elseif (is_page('feature')
     {
      $DirNm = $DirNm  . "/feature"
      $ImgNm = GetImageName($DirNm);  // retrieve random image from directory "feature"
     }
     elseif (is_page('services')
     {
      $DirNm = $DirNm  . "/services"
      $ImgNm = GetImageName($DirNm);  // retrieve random image from directory
    "services"
     }
     else
     {
      $ImgNm = GetImageName($DirNm);  // retrieve random image from current directory
     }

     // print image (or if preferred change to return

      echo "<img src=\"$DirNm.$ImgNm\" width=\"$size_x\" height=\"$size_y\"
    alt=\"$ImgNm\" ";

     // return $DirNm.$ImgNm;  // use this to simply return the image path

}

?>