您好stackoverflow读者和工作人员,我使用分页代码时遇到问题。 当我使用SELECT COUNT(*)作为num FROM $ tbl_name时,一切都很好,但是当我尝试SELECT COUNT(*)作为num FROM $ tbl_name WHERE marca = nokia时,要对包含“nokia”单词的结果进行分页来自名为“modele”的表中的“marca”,我收到一个错误:“警告:mysql_fetch_array()期望参数1是资源,在第17行的E:\ server \ htdocs \ pag.php中给出布尔值”
这是代码框架:
$marca = $_GET['marca'];
/*
First get total number of rows in data table.
If you have a WHERE clause in your query, make sure you mirror it here.
*/
$query = "SELECT COUNT(*) as num FROM $tbl_name WHERE marca=$marca";
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages1 = $total_pages['num'];
/* Setup vars for query. */
$targetpage = "paginare.php"; //your file name (the name of this file)
$limit = 5; //how many items to show per page
$page = $_GET['pagina'];
if($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
/* Get data. */
$sql = "SELECT * FROM $tbl_name LIMIT $start, $limit";
$result = mysql_query($sql);
if ($page == 0) $page = 1; //if no page var is given, default to 1.
$prev = $page - 1; //previous page is page - 1
$next = $page + 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)
{
$pagination .= "<div class=\"pagination\">";
//previous button
if ($page > 1)
$pagination.= "<a href=\"$targetpage?page=$prev\">« Inapoi</a>";
else
$pagination.= "<span class=\"disabled\">« Inapoi</span>";
//pages
if ($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
$pagination.= "<a href=\"$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?pagina=$lpm1\">$lpm1</a>";
$pagination.= "<a href=\"$targetpage?pagina=$lastpage\">$lastpage</a>";
}
//in middle; hide some front and some back
elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
{
$pagination.= "<a href=\"$targetpage?pagina=1\">1</a>";
$pagination.= "<a href=\"$targetpage?pagina=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?pagina=$counter\">$counter</a>";
}
$pagination.= "...";
$pagination.= "<a href=\"$targetpage?pagina=$lpm1\">$lpm1</a>";
$pagination.= "<a href=\"$targetpage?pagina=$lastpage\">$lastpage</a>";
}
//close to end; only hide early pages
else
{
$pagination.= "<a href=\"$targetpage?pagina=1\">1</a>";
$pagination.= "<a href=\"$targetpage?pagina=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)
$pagination.= "<a href=\"$targetpage?page=$next\">Inainte »</a>";
else
$pagination.= "<span class=\"disabled\">Inainte »</span>";
$pagination.= "</div>\n";
}
这里我的php结束了,对不起英语不好,并提前谢谢你。烫发
答案 0 :(得分:2)
SQL中的任何字符串都需要用“或”包围。 像这样:
$query = "SELECT COUNT(*) as num FROM $tbl_name WHERE marca='{$marca}'";
使用生成的查询:
SELECT COUNT(*) as num FROM $tbl_name WHERE marca='nokia'