搜索前没有结果和清除查询字符串的Mysql搜索消息？

Question

我在使用搜索表单进行搜索查询后显示未找到结果消息时遇到了一些困难。我的代码如下。有人可以帮忙吗。

我还希望能够在提交搜索后清除我的查询字符串，例如，如果我在第 3 页，然后用我的表单进行搜索，我没有显示任何结果由于设置了查询字符串，已经在第 3 页上。希望这是有道理的。

function supportquery($viewstate) {

 $display = 6;// number of results per page

        if (isset($_GET['np'])) {
    $num_pages = $_GET['np'];
} else {

    $where = "1"; // default
    switch ($viewstate) {
        case "open": $where = "status='Open'"; break;
        case "pending": $where = "status LIKE 'Pending%'"; break;
        case "closed": $where = "status='Closed'"; break;
    }

    $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop,
        message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE $where ORDER BY ticket_number DESC";
        $search = "%" . $_POST["search"] . "%";
    if ($_POST["search"]) { $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE ticket_number LIKE '$search' OR email LIKE '$search' ORDER BY ticket_number DESC"; 

}

    $query_result = mysql_query ($query); 
    $num_records = @mysql_num_rows ($query_result);
    if ($num_records > $display) {
        $num_pages = ceil ($num_records/$display);
    } else {
        $num_pages = 1;
    }
}



if (isset($_GET['startoftable'])) {
    $start = $_GET['startoftable'];
} else {
    $start = 0;// start of results from row 0 in table

}

    $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev ORDER BY ticket_number DESC LIMIT $start, $display";
    if ($viewstate=='open') {

        $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE status='Open'ORDER BY ticket_number DESC LIMIT $start, $display";
        }
            elseif ($viewstate=='pending') {
        $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE status LIKE 'Pending%' ORDER BY ticket_number DESC LIMIT $start, $display";
        }
        elseif ($viewstate=='closed') {
        $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE status='Closed' ORDER BY ticket_number DESC LIMIT $start, $display";}


    if ($_POST["search"]) {
         $query = "SELECT ticket_number, first_name, surname, email, product, retailer, DATE_FORMAT(dop, '%d %M %Y') AS dop, message, address, DATE_FORMAT(created, '%d %M %Y %r') AS created, status FROM support_dev WHERE ticket_number LIKE '$search' OR email LIKE '$search' ORDER BY ticket_number DESC LIMIT $start, $display";


      }

        $result = @mysql_query ($query);
        $num = mysql_num_rows ($result);

if ($num > 0) {

    if ($num_pages > 1) {
        echo '<div class="pagination"><p>';
        $current_page = ($start/$display) + 1; 

        if ($current_page != 1) {
            echo '<a href="?page_id=1072&amp;startoftable=' . (0) . '&np=' . $num_pages . '&viewstate=' . $viewstate .'">First</a> ';  
            echo '<a href="?page_id=1072&amp;startoftable=' . ($start - $display) . '&np=' . $num_pages . '&viewstate=' . $viewstate . '"><</a> ';
        }

    // range of num links to show
$range = 4;

// loop to show links to range of pages around current page
for ($i = ($current_page - $range); $i < (($current_page + $range)  + 1); $i++) {
   // if it's a valid page number...
   if (($i > 0) && ($i <= $num_pages)) {
      // if we're on current page...
      if ($i == $current_page) {
         // 'highlight' it but don't make a link
         echo " [<b>$i</b>] ";
      // if not current page...
      } else {
         // make it a link
     echo ' <a href="?page_id=1072&amp;startoftable=' . (($display * ($i - 1))) . '&np=' . $num_pages . '&viewstate=' . $viewstate .'">' .$i .'</a> ';

      }}}   

        if ($current_page != $num_pages) {

            echo '<a href="?page_id=1072&amp;startoftable=' . ($start + $display) . '&np=' . $num_pages . '&viewstate=' . $viewstate .'">></a> '; 
            echo '<a href="?page_id=1072&amp;startoftable=' . ( $display * $num_pages-$display ) . '&np=' . $num_pages . '&viewstate=' . $viewstate .'">Last</a> '; 
        }

        echo '</p></div> '; 

    }

         if ($result = mysql_query ($query)) {
         echo '
    <div id="supviewwrapperheader">
    <div id="supviewticket"><p>Ticket</p></div> 
    <div id="supviewfirst"><p>First Name</p></div>
    <div id="supviewlast"><p>Last Name</p></div>
    <div id="supviewemail"><p>Email</p></div>
    <div id="supviewproduct"><p>Product</p></div>
    <div id="supviewretailer"><p>Retailer</p></div>
    <div id="supviewdop"><p>D.O.P.</p></div>
    <div id="supviewmessage"><p>Message</p></div>
    <div id="supviewaddress"><p>Address</p></div>
    <div id="supviewcreated"><p>Date created</p></div>
    <div id="supviewstatus"><p>Status</p></div>
    <div id="supviewbuttons"><p></p></div>
    </div>
    ';

    while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
        echo "
        <div id=\"supviewwrapper\" class=\"".($row[10])."\">
        <div id=\"supviewticket\"><p><a name=\"a".$row[0]."\"></a>$row[0]</p></div>
        <div id=\"supviewfirst\"><p>$row[1]</p></div>
        <div id=\"supviewlast\"><p>$row[2]</p></div>
        <div id=\"supviewemail\"><p>$row[3]</p></div>
        <div id=\"supviewproduct\"><p>$row[4]</p></div>
        <div id=\"supviewretailer\"><p>$row[5]</p></div>
        <div id=\"supviewdop\"><p>$row[6]</p></div>
        <div id=\"supviewmessage\"><p>$row[7]</p></div>
        <div id=\"supviewaddress\"><p>$row[8]</p></div>
        <div id=\"supviewcreated\"><p>$row[9]</p></div>
        <div id=\"supviewstatus\"><p>$row[10]</p></div>
        <div id=\"supviewbuttons\"><p><form method=\"post\" action=\"".htmlentities($_SERVER['REQUEST_URL'])."#a".$row[0]."\"><input type=\"hidden\" name=\"close_row\" value=\"".($row[0])."\" /><input type=\"hidden\" name=\"viewstate\" value=\"".$viewstate."\" /><INPUT TYPE=\"submit\" name=\"open\" VALUE=\"\" class=\"submit_open\"><br /><INPUT TYPE=\"submit\" name=\"pending\" VALUE=\"\" class=\"submit_pending\"><br /><INPUT TYPE=\"submit\" name=\"pending_ami\" VALUE=\"\" class=\"submit_pendingami\"><br /><INPUT TYPE=\"submit\" name=\"pending_arp\" VALUE=\"\" class=\"submit_pendingarp\"><br /><INPUT TYPE=\"submit\" name=\"close\" VALUE=\"\" class=\"submit_closed\"></form></p></div></div>";



    }


     }

    mysql_free_result ($result);

     }

Answer 1

您应该使用LIKE "%{$search}%" 来匹配字符串中的字符串。