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열 머리글을 사용하여 레코드를 정렬하고 드롭 다운을 사용하여 표시 할 레코드 수를 표시하려고합니다. 선택한 레코드를 정렬하여 표시하면 정상적으로 작동합니다. 그러나 레코드 아래의 페이지 번호를 선택하면 정렬 된 순서대로 표시되지 않습니다. 임의로 선택됩니다.PHP로 정렬 및 페이지 매기기
아래 코드
<!doctype html public "-//w3c//dtd html 3.2//en">
<?Php
require "config.php"; // All database details will be included here
$page_name="demo3.php";
$field='id';
$sort='ASC';
if(isset($_GET['sorting']))
{
if($_GET['sorting']=='ASC')
{
$sort='DESC';
}
else
{
$sort='ASC';
}
}
if($_GET['field']=='id')
{
$field = "id";
}
elseif($_GET['field']=='name')
{
$field = "name";
}
elseif($_GET['field']=='year')
{
$field="year";
}
elseif($_GET['field']=='rank')
{
$field="rank";
}
// If you use this code with a different page (or file) name then change this
////// starting of drop down to select number of records per page /////
@$limit=$_GET['limit']; // Read the limit value from query string.
if(strlen($limit) > 0 and !is_numeric($limit)){
echo "Data Error";
exit;
}
// If there is a selection or value of limit then the list box should show that value , so we have to lock that options //
// Based on the value of limit we will assign selected value to the respective option//
switch($limit)
{
case 1:
$select1="selected";
$select2="";
$select4="";
break;
case 2:
$select2="selected";
$select1="";
$select4="";
break;
default:
$select4="selected";
$select1="";
$select2="";
break;
}
@$start=$_GET['start'];
if(strlen($start) > 0 and !is_numeric($start)){
echo "Data Error";
exit;
}
echo "Select Number of records per page: <form method=get action=$page_name>
<select name=limit>
<option value=1 $select1>1</option>
<option value=2 $select2>2</option>
<option value=4 $select4>4</option>
</select>
<input type=submit value=GO>
";
// You can keep the below line inside the above form, if you want when user selection of number of
// records per page changes, it should not return to first page.
// <input type=hidden name=start value=$start>
////////////////////////////////////////////////////////////////////////
//
$eu = ($start - 0);
if(!$limit > 0){ // if limit value is not available then let us use a default value
$limit = 2; // No of records to be shown per page by default.
$page=$_GET['p'];
if($page=='')
{
$page=1;
$start=0;
}
else
{
$start=$limit*($page-1);
}
}
$this1 = $eu + $limit;
$back = $eu - $limit;
$next = $eu + $limit;
/////////////// Total number of records in our table. We will use this to break the pages///////
$nume = $dbo->query("select count(*) from search Order by $field $sort")->fetchColumn();
/////// The variable nume above will store the total number of records in the table////
/////////// Now let us print the table headers ////////////////
$bgcolor="#f1f1f1";
////////////// Now let us start executing the query with variables $eu and $limit set at the top of the page///////////
$query=" SELECT * from search Order by $field $sort limit $eu, $limit ";
echo "<TABLE width=50% align=center cellpadding=0 cellspacing=0> <tr>";
echo'
<th style=color:blue;><a href="demo3.php?&eu='.$eu.'&limit='.$limit.'&sorting='.$sort.'&field=name">Name</a></th>
<th><a href="demo3.php?eu='.$eu.'&limit='.$limit.'&sorting='.$sort.'&field=year">Year</a></th>
<th><a href="demo3.php?eu='.$eu.'&limit='.$limit.'&sorting='.$sort.'&field=rank">Rank</a></th>
';
//////////////// Now we will display the returned records in side the rows of the table/////////
foreach ($dbo->query($query) as $row) {
if($bgcolor=='#f1f1f1'){$bgcolor='#ffffff';}
else{$bgcolor='#f1f1f1';}
echo "<tr >";
echo "<td align=left bgcolor=$bgcolor id='title'> <font face='Verdana' size='2'>$row[name]</font></td>";
echo "<td align=left bgcolor=$bgcolor id='title'> <font face='Verdana' size='2'>$row[year]</font></td>";
echo "<td align=left bgcolor=$bgcolor id='title'> <font face='Verdana' size='2'>$row[rank]</font></td>";
echo "</tr>";
}
echo "</table>";
////////////////////////////// End of displaying the table with records
/////////////// Start the buttom links with Prev and next link with page numbers /////////////////
echo "<table align = 'center' width='50%'><tr><td align='left' width='30%'>";
if($sort=='ASC')
{
$sort='DESC';
}
else
{
$sort='ASC';
}
//// if our variable $back is equal to 0 or more then only we will display the link to move back ////////
if($back >=0) {
print "<a href='$page_name?start=$back&limit=$limit&sort=$sort'><font face='Verdana' size='2'>PREV</font></a>";
}
//////////////// Let us display the page links at center. We will not display the current page as a link ///////////
echo "</td><td align=center width='30%'>";
$i=0;
$l=1;
for($i=0;$i < $nume;$i=$i+$limit){
if($i <> $eu){
echo " <a href='$page_name?start=$i&limit=$limit&sort=$sort'><font face='Verdana' size='2'>$l</font></a> ";
}
else { echo "<font face='Verdana' size='4' color=red>$l</font>";} /// Current page is not displayed as link and given font color red
$l=$l+1;
}
echo "</td><td align='right' width='30%'>";
///////////// If we are not in the last page then Next link will be displayed. Here we check that /////
if($this1 < $nume) {
print "<a href='$page_name?start=$next&limit=$limit&sort=$sort'><font face='Verdana' size='2'>NEXT</font></a>";}
echo "</td></tr></table>";
?>
</body>
</html>
이것은 아주 많은 코드입니다. 관련 코드 만 입력하고 자신이 시도한 것을 추가하고 문제가 무엇이라고 생각하는지 추가하십시오. – Martijn