PHP paging code examples have comments-PHP Tutorial-php.cn

PHP paging code examples have comments

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Release： 2016-07-25 08:54:16

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header("content-type:text/html;charset=utf-8");
//Database connection
$conn = mysql_connect("localhost", "root", "111 ") or die("not connnected : ".mysql_error());
mysql_select_db("test", $conn);
mysql_query("set names utf8");
//Query how many rows of data there are in total
$sql1 = " select count(*) from user";
$ret1 = mysql_query($sql1);
$row1 = mysql_fetch_row($ret1);
$tot = $row1[0];
//How many rows of data per page
$length = 5;
//Total number of pages
$totpage = ceil($tot / $length);
//Current number of pages
$page = @$_GET['p'] ? $_GET['p'] : 1 ;
//limit lower limit
$offset = ($page - 1) * $length;
echo "";
echo "
php padding
";
echo "";
echo "
";
echo "
";
echo "
" ;
echo "
";
echo "
";
//Display the queried data in a table
$sql2 = "select * from user order by id limit { $offset}, {$length}";
$ret2 = mysql_query($sql2);
while ($row2 = mysql_fetch_assoc($ret2)) {
echo "
";
echo "
" ;
echo "
";
}
echo "

ID USER PASS

{ $row2['id']} {$row2['name']} {$row2['pass']}

";
//Previous page and next page
$prevpage = $page - 1;
if ($page >= $totpage) {
$nextpage = $totpage;
} else {
$nextpage = $page + 1;
}
//Jump
echo "
Previous page|Next page
";
echo "";

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Key points of pagination code: "$sql2 = "select * from user order by id limit {$offset}, {$length}";", the relationship between $offset, $length and the number of pages. How to get the previous page and next page, and the critical point.

PHP paging code examples have comments

php padding

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