help_whatif.php

Linux嵌入式设计配套光盘,学习嵌入式设计可参考

<?php

/******************************************************************** 
 * Copyright (c) 2006, Graham P Phillips
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials provided 
 *     with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 ********************************************************************/

include_once "layout.php";

$widget = <<< WIDGET_END
        <h2>What If ...</h2> 
WIDGET_END;

/* Get a directory of the "whatif" topics */
$dir_handle = opendir("whatif");
while ($entry = readdir($dir_handle)) {

  /* if an entry ends in .php, it is a help topic*/
  if (eregi(".php", $entry)) {

    /* Reformat help topics to remove .php and to replace '_' with ' ' */
    $topic = strtr($entry, "_", " ");
    $dot_location = strpos($topic, ".");
    $topic = substr($topic, 0, $dot_location);
    $widget = sprintf("%s<a href=\"whatif/%s\"> ... %s</a><br>",
                    $widget, $entry, $topic);
  }
}
display_page("Help", "HowTo", $widget);

?>