如何解决分页帮助
| *编辑*** 通过将主要用于查询广播的电波查询与分页查询中的某些变量组合在一起，我取得了长足的进步，最终使分页工作。现在唯一的问题是第一页为空白，第二页是正确的，从结果41-80开始 这是限制和拉动电波的查询 $rowsperpage = 40;
$currentpage = (int) $_GET[\'currentpage\'];
$offset = ($currentpage - 1) * $rowsperpage;
$query = \"SELECT * FROM `CysticAirwaves` WHERE `FromUserID` = `ToUserID` AND `status` = \'active\' ORDER BY `date` DESC,`time` DESC LIMIT $offset,$rowsperpage\" ;
$request = mysql_query($query,$connection);
$counter = 0;
while($result = mysql_fetch_array($request)) {
$query = \"SELECT COUNT(*) FROM `CysticAirwaves`\";
$result = mysql_query($query,$connection) or trigger_error(\"SQL\",E_USER_ERROR);
$r = mysql_fetch_row($result);
$numrows = $r[0];
// number of rows to show per page
$rowsperpage = 40;
// find out total pages
$totalpages = ceil($numrows / $rowsperpage);
// get the current page or set a default
if (isset($_GET[\'currentpage\']) && is_numeric($_GET[\'currentpage\'])) {
// cast var as int
$currentpage = (int) $_GET[\'currentpage\'];
} else {
// default page num
$currentpage = 1;
} // end if
// if current page is greater than total pages...
if ($currentpage > $totalpages) {
// set current page to last page
$currentpage = $totalpages;
} // end if
// if current page is less than first page...
if ($currentpage < 1) {
// set current page to first page
$currentpage = 1;
} // end if
// the offset of the list,based on current page
$offset = ($currentpage - 1) * $rowsperpage;
// get the info from the db
$query2 = \"SELECT `id` FROM `CysticAirwaves` LIMIT $offset,$rowsperpage\";
$result = mysql_query($query2,E_USER_ERROR);
// while there are rows to be fetched...
while ($list = mysql_fetch_assoc($result)) {
// echo data
echo $list[\'id\'] . \" : \" . $list[\'number\'] . \"<br />\";
} // end while
/****** build the pagination links ******/
// range of num links to show
$range = 3;
// if not on page 1,don\'t show back links
if ($currentpage > 1) {
// show << link to go back to page 1
echo \" <a href=\'http://www.cysticlife.org/Airwave_build.php?currentpage=1\'><<</a> \";
// get previous page num
$prevpage = $currentpage - 1;
// show < link to go back to 1 page
echo \" <a href=\'http://www.cysticlife.org/Airwave_build.php?currentpage=$prevpage\'><</a> \";
} // end if
// loop to show links to range of pages around current page
for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {
// if it\'s a valid page number...
if (($x > 0) && ($x <= $totalpages)) {
// if we\'re on current page...
if ($x == $currentpage) {
// \'highlight\' it but don\'t make a link
echo \" [<b>$x</b>] \";
// if not current page...
} else {
// make it a link
echo \" <a href=\'http://www.cysticlife.org/Airwave_build.php?currentpage=$x\'>$x</a> \";
} // end else
} // end if
} // end for
// if not on last page,show forward and last page links
if ($currentpage != $totalpages) {
// get next page
$nextpage = $currentpage + 1;
// echo forward link for next page
echo \" <a href=\'http://www.cysticlife.org/Airwave_build.php?currentpage=$nextpage\'>></a> \";
// echo forward link for lastpage
echo \" <a href=\'http://www.cysticlife.org/Airwave_build.php?currentpage=$totalpages\'>>></a> \";
} // end if
/****** end build pagination links ******/
?>
解决方法
这是进行分页的更好方法：
SELECT SQL_CALC_FOUND_ROWS id FROM `CysticAirwaves` LIMIT $offset,$rowsperpage
SELECT FOUND_ROWS()
// if current page is greater than total pages...
if ($currentpage > $totalpages) {
// set current page to last page
$currentpage = $totalpages;
} // end if
// if current page is less than first page...
if ($currentpage < 1) {
// set current page to first page
$currentpage = 1;
} // end if
// currentpage must be within 1 and total of pages.
$currentpage = max(1,min($totalpages,$currentpage));
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。