ユーザーがドロップダウン リストから選択できるカテゴリに基づいてアイテムを検索できる検索ページがあります。カテゴリを選択すると、データと次のページが表示されますが、[次へ] をクリックするとページに結果が表示されません。助けてください
<?php
include("scripts/connection.php");
session_start();
if (empty($_SESSION["username"])) {
header("Location:login.php");
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Search Posts</title>
<link rel="stylesheet" href="style.css" type="text/css" media="all" />
</head>
<body>
<div class="main-menu">
<ul id="menu">
<li><a href="mainhome.php">Home</a></li>
<li><a href="itempost.php">New Post</a></li>
<li><a href="yourpost.php">Your Posts</a></li>
<li id="active"><a href="Search.php">Search Posts</a></li>
<li class="log"><a href="scripts/logout.php">Log Out</a></li>
<li class="log"><a href="account.php">Account</a></li>
</ul>
</div>
<div id="header"><img src="Images/header.gif"/></div>
<div id="sidebar"><h2><u>Posts</u></h2><p/>
<form method="POST" name="SearchForm" action="search.php">
<table id="mainhomeform">
<tr>
<td>Select a category to search through:<p/>
<select name="SearchCategory" class="searchlist" tabindex="1">
<option value="<?php if(isset($searchcategory)){echo $searchcategory;}else{echo "Uncategorized";}?>"><?php if(isset($searchcategory)){echo $searchcategory;}else{echo "Uncategorized";}?></option>
<option value="Clothing">Clothing</option>
<option value="Electronics">Electronics</option>
<option value="Furniture">Furniture</option>
<option value="Stationary">Stationary</option>
</select>
</td>
</tr>
<tr>
<td>
<input name="search" type="submit" class="wbutton" tabindex="3" value="Search" />
</td>
</tr>
</table>
</form>
</div>
<div id="content"><h2><img src="Images/posts.gif"/></h2>
<?php
if(isset($_POST['search'])) {
$searchcategory = $_POST['SearchCategory'];
$searchbutton = $_POST['search'];
$search = "SELECT * FROM items WHERE Category='$searchcategory' ORDER BY PostDate DESC";
$select = mysql_query($search);
$nr = mysql_num_rows($select);
if ($nr>0) {
if (isset($_GET['pn'])) {
$pn = preg_replace('#[^0-9]#i', '', $_GET['pn']);
} else {
$pn = 1;
}
$itemsPerPage = 5;
$lastPage = ceil($nr / $itemsPerPage);
if ($pn < 1) {
$pn = 1;
} else if ($pn > $lastPage) {
$pn = $lastPage;
}
$centerPages = "";
$sub1 = $pn - 1;
$sub2 = $pn - 2;
$add1 = $pn + 1;
$add2 = $pn + 2;
if ($pn == 1) {
$centerPages .= ' <span class="pagenumbers">' . $pn . '</span> ';
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> ';
} else if ($pn == $lastPage) {
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> ';
$centerPages .= ' <span class="pagenumbers">' . $pn . '</span> ';
} else if ($pn > 2 && $pn < ($lastPage - 1)) {
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub2 . '">' . $sub2 . '</a> ';
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> ';
$centerPages .= ' <span class="pagenumbers">' . $pn . '</span> ';
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> ';
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add2 . '">' . $add2 . '</a> ';
} else if ($pn > 1 && $pn < $lastPage) {
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> ';
$centerPages .= ' <span class="pagenumbers">' . $pn . '</span> ';
$centerPages .= ' <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> ';
}
$limit = 'LIMIT ' .($pn - 1) * $itemsPerPage .',' .$itemsPerPage;
$select2 = mysql_query("SELECT * FROM items WHERE Category='$searchcategory' ORDER BY PostDate DESC $limit");
$select2_array = array();
$paginationDisplay = "";
if ($lastPage != "1") {
if ($pn != 1) {
$previous = $pn - 1;
$paginationDisplay .= ' <a class="button" href="' . $_SERVER['PHP_SELF'] . '?pn=' . $previous . '"> Back</a> ';
}
$paginationDisplay .= '<span class="pagenumbers">' . $centerPages . '</span>';
if ($pn != $lastPage) {
$nextPage = $pn + 1;
$paginationDisplay .= ' <a class="button" href="' . $_SERVER['PHP_SELF'] . '?pn=' . $nextPage . '"> Next</a> ';
}
}
for ($count=0; $row = mysql_fetch_array($select2);$count++) {
$select2_array[$count] = $row;
echo "<table id='home'>";
foreach($select2_array as $itemshome);
echo "<tr>";
echo "<td class='title'>". $itemshome ['Title']."</td>";
echo "<td class='rf'>". $itemshome ['PostDate']."<br/>".$itemshome ['Category']."</td>";
echo "<hr>";
echo "</tr>";
echo "<tr>";
echo "<td colspan='3'>"."<img src='$itemshome[Image1]' class='pic' alt='userimage' />";
echo "<img src='$itemshome[Image2]' class='pic' alt='userimage' />";
echo "<img src='$itemshome[Image3]' class='pic' alt='userimage' />"."</td>";
echo "</tr>";
echo "<tr>";
echo "<td colspan='3'>"."<textarea name='Description' type='text' class='description' tabindex='2' readonly >".$itemshome ['Description']."</textarea>"."</td>";
echo "</tr>";
echo "</tr>";
}
echo "</table>";
echo "$paginationDisplay";
} else {
$empty = '<div class="error">That category is empty.</div>';
echo $empty;
}
}
?>
<div class="footer">
<hr/>
Copyright ©<br/>Designed Using XHTML 1.1
<p id="rf">Designed by Mutondo Sitemba</p>
</div>
</div>
</body>
</html>