感谢您的早期响应和建议。
请多多包涵，因为我仍然不熟悉 PHP MySQL 编程。
我的搜索工作正常，除了以下两个问题：
默认情况下，我希望查询在访问页面时返回所有记录 WHERE c_id > 0。c_id 是主键。目前，当我访问该页面时，该页面不显示任何记录。在我为保存为外键数值的类别添加此标准之前，情况并非如此：
AND
cat_id= ' ".$cat_id." '另外，我希望能够对搜索结果进行分页。我正在阅读一些帖子，并提到将搜索词附加到链接。我不知道在我的情况下应该如何使用多个标准。当我根据条件进行搜索后单击下一步按钮时，我当前的分页会返回所有记录。
这是我的全部代码：
搜索页面：
<?php
$ctitle = mysql_real_escape_string($_POST['ctitle']);
$csubject = mysql_real_escape_string($_POST['csubject']);
$creference = mysql_real_escape_string($_POST['creference']);
$cat_id = ($_POST['cat_id']);
$cmaterial = mysql_real_escape_string($_POST['cmaterial']);
$ctechnic = mysql_real_escape_string($_POST['ctechnic']);
$cartist = mysql_real_escape_string($_POST['cartist']);
$csource = mysql_real_escape_string($_POST['csource']);
$sql = "SELECT * FROM collections WHERE c_id>0 AND `ctitle` LIKE '%".$ctitle."%' AND `csubject` LIKE '%".$csubject."%' AND `creference` LIKE '%".$creference."%' AND `cat_id` LIKE '%".$cat_id."%' AND `cmaterial` LIKE '%".$cmaterial."%' AND `ctechnic` LIKE '%".$ctechnic."%' AND `cartist` LIKE '%".$cartist."%' AND `csource` LIKE '%".$csource."%' ORDER BY c_id ASC";
$sql_result = mysql_query ($sql, $connection ) or die ('request "Could not execute SQL query" '.$sql);
// pagination code
$PAGING=new PAGING($sql);
// There are two optional parameters as well:
// $records = 16 //Number of records to be displayed per page
// $pages = Number of pages to be displayed in the paging
$sql=$PAGING->sql;
if (mysql_num_rows($sql_result)>0) {
// The following line gives us an SQL statement with appropriate limits applied
$sql_result=mysql_query($sql) or die($sql." - ".mysql_error());
while ($row = mysql_fetch_assoc($sql_result)) {
$c_id=$row['c_id'];
?>
search results .....................
<?=$PAGING->show_paging("gallery.php")?>
您可能还想查看我正在使用的分页类：
<?php
/************************************************
* ======================================== *
* Perfect MySQL Paging *
* ======================================== *
* Script Name: class.paging.php *
* Developed By: Khurram Adeeb Noorani *
* Email: khurramnoorani@gmail.com *
* My CV: http://www.visualcv.com/kanoorani *
* Twitter: http://www.twitter.com/kanoorani *
* Date Created: 08-JULY-2009 *
* Last Modified: 08-JULY-2009 *
************************************************/
?>
<?php
class PAGING
{
var $sql,$records,$pages;
/*
Variables that are passed via constructor parameters
*/
var $page_no,$total,$limit,$first,$previous,$next,$last,$start,$end;
/*
Variables that will be computed inside constructor
*/
function PAGING($sql,$records=24,$pages=4)
{
if($pages%2==0)
$pages++;
/*
The pages should be odd not even
*/
$res=mysql_query($sql) or die($sql." - ".mysql_error());
$total=mysql_num_rows($res);
$page_no=isset($_GET["page_no"])?$_GET["page_no"]:1;
/*
Checking the current page
If there is no current page then the default is 1
*/
$limit=($page_no-1)*$records;
$sql.=" limit $limit,$records";
/*
The starting limit of the query
*/
$first=1;
$previous=$page_no>1?$page_no-1:1;
$next=$page_no+1;
$last=ceil($total/$records);
if($next>$last)
$next=$last;
/*
The first, previous, next and last page numbers have been calculated
*/
$start=$page_no;
$end=$start+$pages-1;
if($end>$last)
$end=$last;
/*
The starting and ending page numbers for the paging
*/
if(($end-$start+1)<$pages)
{
$start-=$pages-($end-$start+1);
if($start<1)
$start=1;
}
if(($end-$start+1)==$pages)
{
$start=$page_no-floor($pages/2);
$end=$page_no+floor($pages/2);
while($start<$first)
{
$start++;
$end++;
}
while($end>$last)
{
$start--;
$end--;
}
}
/*
The above two IF statements are kinda optional
These IF statements bring the current page in center
*/
$this->sql=$sql;
$this->records=$records;
$this->pages=$pages;
$this->page_no=$page_no;
$this->total=$total;
$this->limit=$limit;
$this->first=$first;
$this->previous=$previous;
$this->next=$next;
$this->last=$last;
$this->start=$start;
$this->end=$end;
}
function show_paging($url,$params="")
{
$paging="";
if($this->total>$this->records)
{
$page_no=$this->page_no;
$first=$this->first;
$previous=$this->previous;
$next=$this->next;
$last=$this->last;
$start=$this->start;
$end=$this->end;
if($params=="")
$params="?page_no=";
else
$params="?$params&page_no=";
$paging.="<ul class='paging'>";
$paging.="<li class='paging-current'>Page $page_no of $last</li>";
if($page_no==$first)
$paging.="<li class='paging-disabled'><a href='javascript:void(0)'><<</a></li>";
else
$paging.="<li><a href='$url$params$first'><<</a></li>";
if($page_no==$previous)
$paging.="<li class='paging-disabled'><a href='javascript:void(0)'><</a></li>";
else
$paging.="<li><a href='$url$params$previous'><</a></li>";
for($p=$start;$p<=$end;$p++)
{
$paging.="<li";
if($page_no==$p)
$paging.=" class='paging-active'";
$paging.="><a href='$url$params$p'>$p</a></li>";
}
if($page_no==$next)
$paging.="<li class='paging-disabled'><a href='javascript:void(0)'>></a></li>";
else
$paging.="<li><a href='$url$params$next'>></a></li>";
if($page_no==$last)
$paging.="<li class='paging-disabled'><a href='javascript:void(0)'>>></a></li>";
else
$paging.="<li><a href='$url$params$last'>>></a></li>";
$paging.="</ul>";
}
return $paging;
}
}
?>
提前感谢您的帮助。