Please enter a search term and try again.";
include("footer.php"); // write footer to complete page
exit; // nothing else to do
}
//##################################################################################################
// A user has entered some search information so we continue.
// First we check that the database file contains entries.
$filename = "data/list.txt"; // database file name
$handle = fopen($filename, "r"); // get file reference
if (filesize($filename) == 0){ // are there any entries to search
fclose($handle); // finished with file close it
print" The Guestbook is empty
"; // NO: inform user
print" Be the first to make an entry"; // optional
include("footer.php"); // write footer, completes page
exit; // nothing else to do
}
// We have established there are entries to search. Read in all records, put each guestbook entry
// into a seperate array element. But first output user feedback message
echo "The result of your search
for the term $search:
";
$datain = fread($handle, filesize($filename)); // read all entries into a variable
fclose($handle); // finished with file close it
$out = explode("", $datain); // split enteries and save into array $out
array_pop($out); // remove last element of array contains no valid
// data result of the last end terminator.
//##################################################################################################
// We now search the array "out" for the users search term. All matches found are stored in the
// array "search_results".
foreach($out as $value){ // search each array element for users search term
$obj_info = unserialize($value); // extract serilised object information
$obj_vars = get_object_vars($obj_info); // we are interested only in the object variables
foreach($obj_vars as $value){ // loop to check each of these object variables
if(stristr($value, $search)){ // for users search term. If a match is found
$search_results[] = $obj_info; // save object info (rechord) in an array.
break; // no reason to check further, we found and saved
} // a match.
}
} // keep looking for a match until end of array "out" is reached
//##################################################################################################
// With the searched completed we check to see if any matches were found. If no matches we clean up
// by informing the user and finally output the footer and exit.
if (count($search_results) == 0){ // no match found inform user accordingly
echo "No Match found.";
include("footer.php"); // write footer, completes page
exit; // nothing else to do
}
//##################################################################################################
// We have a number of search results to display. These will either fit onto one page or spread over
// several pages. To determine the number of pages we define the number of enteries to display per
// page. From this value we define the start and end positions of the data stored in the array and
// display it. Note: A user will have been provided with the option to select a page from multi-page
// search menu bar this page number is used to determine what is displayed.
$perPage=3; // Number of guestbook search entries to show per page. Resonable default is 10.
$singlePage = FALSE; // true if search results fit onto a single page
$total_found = count($search_results); // Total number of matching items
$numberOfPages = ceil($total_found/$perPage); // Total number of pages from search
if ($total_found <= $perPage){ // Do the search results fit on a single page
$start = 0; // YES: first entery starts at array location 0
$end = $total_found - 1; // set last entry location, note -1
$singlePage = TRUE; // Set the single page indicator flag
}
else{ // NO: Use default or users page selection.
if($pageNum == 0){ // Did the user select a page to display
$pageNum = 1; // NO: we set a default to display first page
}
// To output a page from the results array we define page start and end based on page number
$start = ($pageNum-1) * $perPage; // Defines any page's start boundary
if($total_found >= ($pageNum * $perPage)){ // Check to see if it is a full page
$end = ($pageNum * $perPage)-1; // Yes: Set end to page boundary end -1
}
else{ // Not a full page end point is the total found
$end = $total_found - 1; // Set end accordingly again -1
}
}
//##################################################################################################
// Display search page results using our start and end points defined.
for($i=$start; $i<=$end; $i++){ // Display page or part of page
echo "
";
print"\n";
}
//##################################################################################################
// If the search results were a single page for display we can clean up and finish.
if($singlePage){ // Was it a single page search result
include("footer.php"); // YES: write footer, completes page
exit; // nothing else to do
}
//##################################################################################################
// The search results produced multi-pages we have displayed either the deafult or one a user
// selected. In either case we need to return a navigation bar allowing the user to select another
// page from the results. Each nav link needs to keep the search term alive so we add it to all nav
// bar links. A user can overide these by entering a new search term in the form
//==================================================================================================
// The nav bar is dynamic and adjusts to the number of pages found. Links are added until a predefined
// maximum is reached. For example if I define a core group to have a maximum of three the links are
// displayed in this sequence [1], [1] [2] and [1] [2][3].
// When the number of pages exceeds the core group’s capacity, additional links (I use chevrons)
// transform the core group into a variable block for example <<<[4][5][6]>>> clicking on the left
// chevrons slides the block to give <<<[1][2][3]>>> and click on the right chevrons produce
// <<<[7][8][9]>>> .
// Once the number of pages exceeds three blocks, I hammer in fixed reference points. These are the
// first and last page links; again, added only when required.
// It is more difficult to explain than implement.
//==================================================================================================
// Dynamic nav bar creation. Setup
$self = $_SERVER['PHP_SELF']; // This page's path used in link creation
// The nav bar is contained in a paragraph tag. We add to this string to build a complete nav bar.
$gbSearchNav = "";
$numNavItems = 10; // Number of seperate page links to display in nav menu
$numNavGroup = (INT)(($pageNum-1)/$numNavItems) ; // Calculate number of navigation groups
// multiples of nav items
if($numberOfPages > (($numNavGroup+1)*$numNavItems)){ // More than a full block of nav links required
$ref = ($numNavGroup+1)*$numNavItems; // Yes: calculate pages catered for within
} // a full group of links.
else{ // No: could be equal or less than a full group of links
$ref = $numberOfPages; // so all the pages are catered for.
}
//Show page 1 link, back ref (chevrons) to previous page and keep search term alive
$back_ref = $numNavGroup*$numNavItems; // back navigation
$forward_ref = (($numNavGroup+1)*$numNavItems)+1; // forward navigation
if($numNavGroup >0){ // Add first page and back nav (chevrons)to menu
$gbSearchNav .= " Page 1 ";
$gbSearchNav .= " <<< ";
}
// Add page nav core group and square brackets or other separator.
for($page = $numNavGroup*$numNavItems+1; $page < $ref+1; $page++){
$gbSearchNav .= "[ $page ]";
}
if($numberOfPages >(($numNavGroup+1)*$numNavItems) ){ // Add last page and forward nav
$gbSearchNav .= " >>> ";
$gbSearchNav .= " Page $numberOfPages ";
}
$gbSearchNav .= "
"; // complete the paragraph
echo $gbSearchNav; // after all that hard work display it
//print"
Remove this line Finished
";
//######################################## END #####################################################
?>