Site 1 rotate debugtrace

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

    ini_set('display_errors', 'On');
    error_reporting(E_ALL);

    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 files
     names into an array; Then returns a random name to the caller
    */
    function  GetImageName($DirName)
            {
             $file = 'debugtrace.txt';
             $Img = array();  // define array

             // image types accepted:  jpg png gif
             $ImgPath = $DirName . '/' . '{*.jpg,*.gif,*.png}';


             file_put_contents($file, $ImgPath); // Write trace

             foreach (glob($ImgPath, GLOB_BRACE) as $filename)
             {
              if (is_readable($filename))
                    $Img[]  = $filename;  // found image file
             }

             file_put_contents($file, $Img, FILE_APPEND ); // Write trace

             $Imgcount = sizeof($Img) - 1; // the index is zero-based
             if ($Imgcount <= 0)
                return "/wp-content/themes/custom/img/rotatepics/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('references') )
             {
              $DirNm = $DirNm  . "/references";
              $ImgNm = GetImageName($DirNm);  // retrieve random image from directory "references"
             }
             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
             }


             $file = 'debugtrace.txt';
             file_put_contents($file, $DirNm, FILE_APPEND ); // Write trace
             file_put_contents($file, $ImgNm, FILE_APPEND ); // Write trace

             $ImgTag =  '<img src="' . $ImgNm . '" width="' . $size_x . '" height="' . $size_y . '"  alt="' . $ImgNm . '">';
             file_put_contents($file, $ImgTag, FILE_APPEND ); // Write trace

             echo $ImgTag;

    }

?>