메모장에 복사해서 해보세용..
음.. 저도 그런경우가 몇번있었는뎅..!

워드 파일을 다른이름으로 저장하세요. 확장자는 txt로.. 그럼 간단하게 해결을 ^^

조사해보니 아래의 번역된 내용이 있더군요..

StarOffice Writer, Microsoft Word 및 Abiword (와)과 같은 워드 프로세서는,PHP 파일의 편집에 적합하지 않습니다. 이러한 워드프로세서상에서 테스트 스크립트를 편집하는 경우는, 파일을 plaintext로서 보존하고 있는 것을 확인해 주세요
[출처] http://phpman-j2k.tistory.com/9

해결방법을 찾아보다가 아래와 같은것을 찾았습니다.

    1 <?php
    2 /*
    3 Plugin Name: Plaintext
    4 Plugin URI: http://www.thunderguy.com/semicolon/wordpress/plaintext-wordpress-plugin/
    5 Description: Allow visitors to view any file (even PHP or HTML files) as plain text simply by placing the file inside a "plaintext" directory. After activating or deactivating, go to the <a href="options-permalink.php">Permalinks</a> page to complete the process.
    6 Version: 1.4
    7 Author: Bennett McElwee
    8 Author URI: http://www.thunderguy.com/semicolon/
    9
  10 $Revision$
  11
  12 INSTRUCTIONS
  13
  14 1. Copy this file into your plugins directory.
  15 2. Log in to WordPress administration. Go to the Plugins page and Activate this plugin.
  16 3. In WordPress administration, go to Options and click Permalinks.
  17 4. Create a directory called "plaintext" in your wp-contents directory.
  18
  19 Place files within the plaintext directory. These files will be accessible in a virtual plaintext directory in your blog. For example, if you have a PHP file in /blog/example.php, then anybody who views it will see the output from the PHP script. However, if you put the file in /blog/wp-content/plaintext/example.php, then anybody who views the file through the URL /blog/plaintext/example.php will see the source code for the PHP script.
  20
  21 Use this plugin for distributing your source soce to an admiring world.
  22
  23
  24 Copyright (C) 2005 Bennett McElwee (bennett at thunderguy dotcom)
  25
  26 This program is free software; you can redistribute it and/or
  27 modify it under the terms of the GNU General Public License
  28 as published by the Free Software Foundation; either version 2
  29 of the License, or (at your option) any later version.
  30
  31 This program is distributed in the hope that it will be useful,
  32 but WITHOUT ANY WARRANTY; without even the implied warranty of
  33 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34 GNU General Public License for more details.
  35
  36 You should have received a copy of the GNU General Public License
  37 along with this program; if not, write to the Free Software
  38 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  *** 개인정보보호를 위한 전화번호 노출방지 ***  USA
  39 The license is also available at http://www.gnu.org/copyleft/gpl.html
  40 */
  41
  42
  43
  44 // Configuration
  45
  46 $tguy_pt_base = 'plaintext';
  47
  48
  49
  50 // If this file is called directly, display the requested file
  51
  52 if (!defined('ABSPATH')) {
  53 // WordPress is not loaded.
  54 // This file is probably being called to display a file as plain text.
  55 error_reporting(E_ALL ^ E_NOTICE);
  56 if ($_GET['plaintextpath'] != '') {
  57 // We're required to serve a file. If the file exists and is
  58 // within the plaintext directory and exists, then serve it as
  59 // plain text.
  60 $plaintext_root = dirname(dirname(__FILE__)) . "/$tguy_pt_base/";
  61 $file_path = $plaintext_root . $_GET['plaintextpath'];
  62 $plaintext_root = realpath(strtr($plaintext_root, '\\', '/'));
  63 $file_path      = realpath(strtr($file_path, '\\', '/'));
  64 if (file_exists($file_path)
  65 &&  0 == strncmp($file_path, $plaintext_root, strlen($plaintext_root))) {
  66 header('Content-type: text/plain');
  67 readfile($file_path);
  68 } else {
  69 // Either the file does not exist, or it's not in the plaintext
  70 // directory. This should never happen unless somebody accesses
  71 // this script directly, in which case they deserve nothing more
  72 // than this minimal message.
  73 header("HTTP/1.0 404 Not Found");
  74 header('Content-type: text/plain');
  75 echo 'The file does not exist.';
  76 }
  77 exit;
  78 }
  79 }
  80
  81
  82 // Internal machinery
  83
  84 function &tguy_pt_rewrite_rules(&$rules_string) {
  85 /* Add a new rule to the given string so as to enable plaintext URLs.
  86 This rule must come before the default WordPress "catch-all" rule.
  87 If a request is for a file in blog-home/plaintext, and if the
  88 corresponding file exists in blog-root/wp-content/plaintext, then
  89 the request is mapped internally to a request for plaintext.php
  90 (this file), with the path of the original file as a query argument.
  91 */
  92 global $tguy_pt_base;
  93
  94 $site_root = parse_url(get_settings('siteurl'));
  95 $site_root = trailingslashit($site_root['path']);
  96
  97 // Rewrite "/blog/plaintext/source/file.php"
  98 // as "/blog/wp-content/plugins/plaintext.php?plaintextpath=source/file.php"
  99 $rules_string =
  100 "# Begin Plaintext WordPress plugin
  101 <IfModule mod_rewrite.c>
  102 RewriteEngine On
  103 RewriteBase {$site_root}
  104 RewriteCond %{DOCUMENT_ROOT}{$site_root}wp-content/{$tguy_pt_base}/$1 -f
  105 RewriteRule ^$tguy_pt_base/(.+)$ {$site_root}wp-content/plugins/plaintext.php?plaintextpath=\$1 [L]
  106 </IfModule>
  107 # End Plaintext WordPress plugin
  108 " . $rules_string;
  109 return $rules_string;
  110 }
  111
  112 // Enable plaintext URLs
  113 if (function_exists('add_filter')) {
  114 add_filter('mod_rewrite_rules', 'tguy_pt_rewrite_rules');
  115 }
  116
  117 ?>

[출처] http://semi-wp-plugins.svn.sourceforge.net/viewvc/semi-wp-plugins/plaintext/branches/current/plaintext.php?view=markup

테스트해보지는 않았습니다.

[출처] http://rephrase.net/box/word/plaintext/plaintext.phps

<?php
/*
Plugin Name: Plaintext View
Version: 1.0
Plugin URI: http://rephrase.net/box/word/plaintext/
Description: Displays unfiltered post content (e.g., pre-Markdown)
Author: Sam Angove
Author URI: http://rephrase.net/
*/
 
/*

To get a link to the plaintext version of a post, use "echo Plaintext::link();".

This plugin is intended for use with input which is filtered through a system
such as Markdown or Textile for display. If you use the rich text editor in
WordPress 1.6+, there is no point in using it.

*/
 
/* Options */
 
/* Word wrap to how many characters? 0 for no wrap. */
$plaintext['wrap'] = 0;
 
 
class Plaintext {
       
        function link() {
                $link = get_permalink();
                               
                if (false === strpos($link, '?'))
                        $link = trailingslashit($link) . 'text';
                else
                        $link .= '&plaintext=true';
                       
                return $link;
        }
       
        function generate_rewrite($wp_rewrite) {
               
                $structure = $wp_rewrite->permalink_structure;
                if ($structure{strlen($structure)-1} == '/') {
                        $wp_rewrite->add_rewrite_tag('%plaintext%', '(text)', "plaintext=");
                } else {
                        add_filter('rewrite_rules_array', array('Plaintext', 'rewrite_filter'));
                        $wp_rewrite->add_rewrite_tag('%plaintext%', '([./]text)', "plaintext=");
                }
                $structure .= "%plaintext%";
                $rules = $wp_rewrite->generate_rewrite_rule($structure);
                foreach ($rules as $match => $redirect) {
                        $match = str_replace(array('(/[0-9]+)?/?$', '/trackback/?$'), '$', $match);
                        $redirect = preg_replace(array("#&tb=1#", "#&page=.[0-9]+#"), '', $redirect);
                        $newrules[$match] = $redirect;
                }
                $wp_rewrite->rules += $newrules;
        }
       
        function rewrite_filter($rules) {
                foreach ($rules as $match => $redirect) {
                        $match = str_replace('([^/]+)', '([^/.]+)', $match);
                        $newrules[$match] = $redirect;
                }
                return $newrules;     
        }
       
        function register_query_var($vars) {
                $vars[] = 'plaintext';
                return $vars;
        }
       
        function show() {
                global $plaintext;
               
                $var = get_query_var('plaintext');
               
                if (!empty($var)) {
                                               
                        @header('Content-type: text/plain; charset=utf-8');
 
                        if (have_posts()) :
                                while (have_posts()) : the_post();
                                                $title = get_the_title();
                                                echo $title."\n";
                                                echo str_repeat("=", strlen($title));
                               
                                                echo "\n\n";
                                                echo "  By ".get_the_author()."\n";
                                                echo "  <".get_permalink().">\n";
                                                echo "  ". the_date('', '', '', '', false) . "\n\n\n";
                               
                                                if ($plaintext['wrap'] > 0) {
                                                        echo wordwrap(get_the_content(), $plaintext['wrap'], "\n");
                                                } else {
                                                        echo get_the_content();
                                                }
                                               
                                                echo "\n\n\n";
                                               
                                endwhile;
                        endif;
 
                        exit;
                }
        }
}
 
 
 
add_action('generate_rewrite_rules',  array('Plaintext', 'generate_rewrite'));
add_action('template_redirect', array('Plaintext', 'show'));
 
add_filter('query_vars', array('Plaintext', 'register_query_var'));
 
?>