我正在将我的MySQL结果分页到每页10个。到目前为止,我已经能够计算列中有多少结果,计算如果有10个结果/页面将会有多少页,显示页数并添加每个页面的链接(例如:Page1,第2页,第3页,第4页......)
目前,所有38个结果都显示在一个页面上。当我点击页码时,我被带到了正确的链接,但是带有38个结果的内容是相同的。我知道我需要将38个结果分成四页。这是我坚持的地方:
要查找页数,我有变量:
$pages = ceil($items_number / $per_page )
然而,在我看过的多个教程中:
$pages = ceil(mysql_results($items_number,0) / $per_page )
允许数据计数从0开始。当我尝试这个时,我收到错误
Fatal error: Call to undefined function mysql_results()
所以我没有选择从0开始计算结果(使用mysql_result
)并将其分成每页10个。
如何绕过mysql_result
并能够为每个页码显示相应的数据/项目数?
这是一个链接,可点击的页码位于顶部: http://test.ishabagha.com/classic_cars/pag_test.php
代码:
<?php
require_once("./includes/database_connection.php");
error_reporting(E_ALL);
ini_set('display_errors', 1);
$page = "";
$per_page = 10;
$query = "SELECT productCode, productName, productLine, productScale, productVendor, productDescription, buyPrice FROM products WHERE `productLine` = 'Classic Cars'";
$result = mysqli_query($dbc, $query)
or die(mysqli_error($dbc));
$query_count = "SELECT count(productLine) FROM products WHERE productLine = 'Classic Cars'";
$items = mysqli_query($dbc, $query_count)
or die(mysqli_error($dbc));
$row = mysqli_fetch_row($items);
$items_number = $row[0];
$pages = ceil($items_number / $per_page )
?>
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<title>Home</title>
<link type="text/css" rel="stylesheet" href="classic_cars.css" />
</head>
<body>
<?php
require_once("./includes/navigation.php");
?>
<?php
for($number = 1; $number <= $pages; $number++) {
echo "<a href='?page=$number'>$number</a>";
}
while ($row = mysqli_fetch_array($result)) {
$product_code = $row['productCode'];
$product_name = $row['productName'];
$product_line = $row['productLine'];
$product_vendor = $row['productVendor'];
$product_description = $row['productDescription'];
$buy_price = $row['buyPrice'];
echo "<tr>
<td><p>$product_name</p></td>
</tr>";
} // end while ($row = mysqli_fetch_array($result))
?>
<?php
require_once("./includes/footer.php");
?>
</body>
</html>
答案 0 :(得分:0)
mysql_*
API与mysqli_*
混合在一起。您应该只在项目中使用一个API,我建议仅使用mysqli_*
。;
ceil($items_number / $per_page )
LIMIT
$query
首先获取总行数(替换上一行):
$items_number = mysqli_num_rows($items);
让我们使用$_GET["page"]
确定您当前的页面。如果您的网址中未找到任何网页,则显示的默认网页是第一个。
将此信息放在$pages = ceil($items_number / $per_page);
if (isset($_GET['page']) && is_numeric($_GET['page'])) { /* IF PAGE NUMBER IS VALID */
$currentpage = (int) $_GET['page']; /* STORE THE CURRENT PAGE */
} else {
$currentpage = 1; /* DEFAULT PAGE IS SET TO 1 */
}
if ($currentpage > $pages) { /* IF CURRENT PAGE IS 2 OR MORE */
$currentpage = $pages;
}
if ($currentpage < 1) { /* IF CURRENT PAGE IS LESS THAN 1, WHICH WE SHOULD PREVENT */
$currentpage = 1; /* DEFAULT PAGE IS SET TO 1 */
}
$offset = ($currentpage - 1) * $per_page; /* SET AN OFFSET FOR YOUR QUERY LATER */
您的查询应该是这样的:
$query = "SELECT productCode, productName, productLine, productScale, productVendor, productDescription, buyPrice
FROM products
WHERE `productLine` = 'Classic Cars'
LIMIT $offset, $per_page"; /* LIMITS THE NUMBER TO SHOW IN A PAGE */
但我们应该移动这个查询,以及我上面给出的第一个代码之后的执行。所以安排是:
$query_count = "SELECT productLine FROM products WHERE productLine = 'Classic Cars'";
$items = mysqli_query($dbc, $query_count) /* EXECUTE THE QUERY */
or die(mysqli_error($dbc));
$items_number = mysqli_num_rows($items); /* GET THE NUMBER OF RESULTS */
$items_number = number_format($items_number); /* SECURE THE FORMAT THAT IT IS A NUMBER */
$per_page = 10; /* NUMBER OF ROWS TO SHOW PER PAGE */
$pages = ceil($items_number / $per_page );
/* THE CODE I HAD GIVEN THAT GETS THE CURRENT PAGE AND DEFINES THE $offset */
/* THEN THE QUERY THAT LIMITS THE NUMBER OF ROWS TO FETCH */
/* THEN YOU FETCH THE RESULT, AND THEN THE HTML */