分页下一页应为2，但应为0

Question

The first page should be 1 but its -1 and the next page should be 2 but its 0.

How can I make this work? I have tried to edit the $page but when I do, the if/else get wierd.

I added the whole code...

 ...
$resultt= "SELECT * FROM users WHERE AND country='$okc' AND state='$oks'";

if(!empty($a1) && empty($a2)){
  $resultt .= " AND aar>=";
  ...
}

There are more than 1 if statement.

         $result = mysqli_query($con,"$resultt");
         $rec_limit = 19;
         $row = mysqli_fetch_array($result);
         $rec_count = $row[0];

         if( isset($_GET['page'] ) )
         {
            $page = $_GET['page'] + 1;
            $offset = $rec_limit * $page ;
         }
         else
         {
            $page = 0;
            $offset = 0;
         }
         $left_rec = $rec_count - ($page * $rec_limit);

         $resultt .= "LIMIT $offset, $rec_limit";
         $sql = $resultt;

         $retval = mysqli_query( $con, "$resultt" );

         if( $page > 0 )
         {
            $last = $page - 1;
            echo "<a href=\"$_PHP_SELF?page=$last\">Last 10 Records</a> |";
            echo "<a href=\"$_PHP_SELF?page=$page\">Next 10 Records</a>";
         }

         else if( $page == 0 )
         {
            echo "<a href=\"$_PHP_SELF?page=$page\">Next 10 Records</a>";
            }

         else if( $left_rec < $rec_limit )
         {
            $last = $page - 2;
            echo "<a href=\"$_PHP_SELF?page=$last\">Last 10 Records</a>";
         }

while($row = mysqli_fetch_array($retval, MYSQL_ASSOC))
{

}

Answer 1

$_GET is an array like your $row.

to access array keys you always use [].

change your get into $_GET['page']

even better:

$page = isset($_GET['page']) ? intval($_GET['page']) : 1;

is page set then convert value to int, because you dont know whats incomming. if not set take page 1.

btw. constructs like this:

$resultt = "LIMIT $offset, $rec_limit";

can/will cause sql injections bugs within you homepage! never build a sql with variables! Use parameters instead!

Answer 2

You should change parts of code to get it to work. $_GET['page'] should give you the queried page number itself, so don't try to manipulate it.

$sql = "SELECT * FROM users WHERE country='$okc' AND state='$oks'"
$rec_limit = 10;
$result = mysqli_query( $con, $sql );
$row = mysqli_fetch_array( $result );
$rec_count = $row[0];
$left_rec = $rec_count - ( $rec_limit * $page );


$page = isset($_GET['page']) ? intval($_GET['page']) : 1;
$offset = $rec_limit * ( $page - 1 ) ;

$sql.= " LIMIT $rec_limit OFFSET $offset";
$result = mysqli_query( $con, $sql );

$row = mysqli_fetch_array( $result );

if( $page > 1 ){
    $last = $page - 1;
    echo "<a href=\"$_PHP_SELF?page=$last\">Last 10 Records</a> |";
    echo "<a href=\"$_PHP_SELF?page=$page\">Next 10 Records</a>";
}else if( $page == 1 ){
    echo "<a href=\"$_PHP_SELF?page=$page\">Next 10 Records</a>";
}else if( $left_rec < $rec_limit ){
    $last = $page - 2;
    echo "<a href=\"$_PHP_SELF?page=$last\">Last 10 Records</a>";
}

while( $row = mysqli_fetch_array( $result, MYSQL_ASSOC ) ){

    // use $row to echo row contents ...

}