问题1：我的脚本分页无法正常工作。在20个条目之后，它仅显示最近的20个条目，并且不将它们分成不同的页面。代码如下：
问题2：我在其他地方使用相同的分页脚本并且在那里它正确分割但在下一页上它显示了与第1页相同的结果。我使用相同的脚本，除了第二个脚本： / p>
$query = "SELECT COUNT(*) as num FROM table where id =
'$uid' ORDER BY id DESC";
，其中的SQL是：
$sql="SELECT table_one.field_id, table_constant.field_name,
table_one.field_2, table_one.field_3 FROM table_one LEFT
JOIN table_constant ON table_one.common_field
= table_constant.common_field WHERE table_constant.u_id = '$uid'";
代码：
<?php
$tbl_name=""; //not using this since i am doing a union
$adjacents = 3;
$query = "SELECT COUNT(*) as num
from table_one LEFT JOIN table_constant on table_one.c_id
= table_constant.c_id
where table_constant.user_id = '$uid'
UNION
SELECT COUNT(*) as num
from table_two LEFT JOIN table_constant on table_two.c_id
= table_constant.c_id
where table_two.added_by = '$uid'
UNION
SELECT COUNT(*) as num
from table_three LEFT JOIN table_constant ON table_three.c_id
= table_constant.c_id
where table_constant.user_id = '$uid'
UNION
SELECT COUNT(*) as num
from table_four LEFT JOIN table_constant ON table_four.c_id
= table_constant.c_id
where table_constant.user_id = '$uid'
ORDER BY date_time_added DESC";
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages = $total_pages[num];
$targetpage = "page.php";
$limit = 20;
$page = $_GET['page'];
if($page)
$start = ($page - 1) * $limit; //first item to display on this page
else
$start = 0; //if no page var is given, set start to 0
$sql = "select table_one.field1, table_constant.field1,
table_one.field2, table_one.field3, table_one.field4,
table_one.field5, table_constant.c_id
from table_one LEFT JOIN table_constant on table_one.field1
= table_constant.c_id
where table_constant.user_id = '$uid'
UNION
select table_two.field1, table_constant.field1, table_two.field2,
table_two.field3, table_two.field4, table_two.field5, table_constant.c_id
from table_two LEFT JOIN table_constant on table_two.c_id
= table_constant.c_id
where table_two.added_by = '$uid'
UNION
select table_three.field1, table_constant.field1, table_three.field2,
table_three.field3, table_three.field4, table_three.field5,
table_constant.c_id
from table_three LEFT JOIN table_constant ON table_three.c_id
= table_constant.c_id
where table_constant.user_id = '$uid'
UNION
select table_four.field1, table_constant.field1, table_four.field2,
table_four.field3, table_four.field4, table_four.field5,
table_constant.c_id
from table_four LEFT JOIN table_constant ON table_four.c_id
= table_constant.c_id
where table_constant.user_id = '$uid'
ORDER BY date DESC LIMIT $start, $limit";
$result = mysql_query($sql);
$query = mysql_query($sql) or die ("Error: ".mysql_error());
$result = mysql_query($sql);
if ($result == "")
{
echo "";
}
echo "";
$rows = mysql_num_rows($result);
if($rows == 0)
{
print("");
}
elseif($rows > 0)
{
while($row = mysql_fetch_array($query))
{
$fields = $row['field']; //Table one Field 1
$fields2 = $row['field']; //Table Constant Field 1
$fields3 = $row['field'];// Table One field 4
$fields4 = $row['field'];//Table Constant Field 2
print("$fields<br>$fields2<br>$fields3<br>$fields4");
}
}
if(mysql_num_rows($result) < 1) {
echo "";
}
/* Setup page vars for display. */
if ($page == 0) $page = 1; //if no page var is given, default to 1.
//next page is page + 1
$lastpage = ceil($total_pages/$limit);
//lastpage is = total pages / items per page,
rounded up.
$lpm1 = $lastpage - 1; //last page minus 1
/*
Now we apply our rules and draw the pagination object.
We're actually saving the code to a variable in case we
want to draw it more than once.
*/
$pagination = "";
if($lastpage > 1)
{
$pagination .= "<div class=\"pagination\"></div>";
//previous button
if ($page > 1)
$pagination.= "";
else
$pagination.= "";
//pages
if ($lastpage < 7 + ($adjacents * 2))
//not enough pages to bother breaking it up
{
for ($counter = 1; $counter <= $lastpage; $counter++)
{
if ($counter == $page)
$pagination.= "<span class=\"current\">$counter  </span>";
else
$pagination.= "<a id=\"numberhighlighter\" href=\"$targetpage?page=$counter\">$counter  </a>";
}
}
elseif($lastpage > 5 + ($adjacents * 2)) //enough pages to hide some
{
//close to beginning; only hide later pages
if($page < 1 + ($adjacents * 2))
{
for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
{
if ($counter == $page)
$pagination.= "<span class=\"current\">$counter  </span>";
else
$pagination.= "<a href=\"$targetpage?page=$counter\">$counter   </a>";
}
$pagination.= "...";
$pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
$pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";
}
//in middle; hide some front and some back
elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
{
$pagination.= "<a href=\"$targetpage?page=1\">1</a>";
$pagination.= "<a href=\"$targetpage?page=2\">2</a>";
$pagination.= "...";
for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
{
if ($counter == $page)
$pagination.= "<span class=\"current\">$counter</span>";
else
$pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";
}
$pagination.= "...";
$pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
$pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";
}
//close to end; only hide early pages
else
{
$pagination.= "<a href=\"$targetpage?page=1\">1</a>";
$pagination.= "     <a href=\"$targetpage?page=2\">2&</a>";
$pagination.= "...";
for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
{
if ($counter == $page)
$pagination.= "<span class=\"current\">$counter</span>";
else
$pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";
}
}
}
//next button
if ($page < $counter - 1)
$pagination.= "";
else
$pagination.= "";
}
?>
<div id="page">
<?php
print("$pagination");
?>
谢谢！
答案 0 :(得分：1)
我不确定这对你有多大帮助，但是
1。）你的$ uid定义在哪里？也许它就在那里，我错过了它，因为你有很多代码。如果它是在控制器或其他类型的中间人文件中定义的，那么当您更改页面时，uid会被取消设置？
2。）如果您多次使用相同的分页，则将其创建为函数。
我假设使用您正在使用的查询得到的结果是正确的，唯一的问题是它没有在其他页面上显示正确的结果。如果是这种情况，那么使用我调整的这个功能。 （您可能需要自己调整一下，例如您的页面可能不像我的那样阅读domain.com/pg=3）
function Pagination($list, $limit){
global $pagination;
global $total_pages;
global $pg;
global $offset;
global $page_limit;
$page_limit = $limit;
global $total_results;
$total_results = $list;
global $offset;
// number of rows to show per page
// find out total pages
$total_pages = ceil($list / $limit);
// get the current page or set a default
if ($pagination) {
// cast var as int
$pg = $pagination;
} else {
// default page num
$pg = 1;
} // end if
// if current page is greater than total pages...
if ($pg > $total_pages || $pg == "last") {
// set current page to last page
$pg = $total_pages;
} // end if
// if current page is less than first page...
if ($pg <= 1 || $pg == "first") {
// set current page to first page
$pg = 1;
} // end if
// the offset of the list, based on current page
$offset = ($pg - 1) * $limit;
// get the info from the db
}
function PaginationLinks($url, $tab){
global $pg;
global $total_pages;
global $total_results;
global $page_limit;
global $offset;
$displayed_results = ($total_results - $offset);
if($displayed_results >= $page_limit && $total_results > $page_limit){
$displayed_results = $page_limit;
}
/****** build the pagination links ******/
// range of num links to show
$range = 5;
if($tab){
$tab = "?$tab";
}
// if not on page 1, don't show back links
if ($pg > 1) {
// show << link to go back to page 1
echo "<li class='pagination'><a href='$url/pg=first$tab'><<</a></li>";
// get previous page num
$prevpage = $pg - 1;
// show < link to go back to 1 page
echo "<li class='pagination'><a href='$url/pg=$prevpage$tab'><</a></li>";
} // end if
// loop to show links to range of pages around current page
for ($x = ($pg - $range); $x < (($pg + $range) + 1); $x++) {
// if it's a valid page number...
if (($x > 0) && ($x <= $total_pages)) {
// if we're on current page...
if ($x == $pg) {
// 'highlight' it but don't make a link
echo "<li class='current_page'>$x</li>";
// if not current page...
} else {
// make it a link
echo "<li class='pagination'><a href='$url/pg=$x$tab'>$x</a></li>";
} // end else
} // end if
} // end for
// if not on last page, show forward and last page links
if ($pg != $total_pages) {
// get next page
$nextpage = $pg + 1;
// echo forward link for next page
echo "<li class='pagination'><a href='$url/pg=$nextpage$tab'>></a></li>";
// echo forward link for lastpage
echo "<li class='pagination'><a href='$url/pg=last$tab'>>></a></li>";
} // end if
/****** end build pagination links ******/
echo "<div style='float:right; align: right; margin-top: 10px'>Displaying <font class='f2'>$displayed_results</font> of <font class='f2'>$total_results</font> results</div>";
} // end pagination links function
使用：（我使用的是基本的“用户”表，因为它很简单）
编写一个查询以获取您要查找的任何行的总行数。示例：
$getusers = mysql_query("SELECT * FROM users", $conn);
$total_users = mysql_num_rows($getusers)
$display_limit = "20" // display 20 users per page
然后使用第一个函数。
Pagination($total_users, $display_limit);
然后再次运行查询，但此时设置限制，以便每页只显示20个用户。
$getusers = mysql_query("SELECT * FROM users ORDER BY id DESC LIMIT $offset, $display_limit", $conn);
if($total_users == 0){
echo "There are no users at this time.";
}
else {
// for each user
while ($rowuserss = mysql_fetch_assoc($getusers)) {
// echo data
$user_id = $rowusers['id'];
$username = $rowusers['username'];
// etc etc
}
然后要显示链接，请使用第二个查询
PaginationLinks($url_to_go_to, $optional_tab_if_you_need_to_select_a_default_tab);
只要您的查询开头是正确的，无论多么复杂，这都适用于任何查询。听起来像你的查询是正确的，只是结果显示在第二页上。任何方式，如果该功能对你不起作用，你仍然应该为它自己的功能创建你的分页，这是太多的代码，不能在多个位置写出来。