Hulp voor Pagination gevraagd

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Sander Heuv

Sander Heuv

12/10/2011 21:06:32
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Hallo allemaal. Ik ben nieuwe op dit forum en ik ben dringend op zoek naar een klein beetje hulp omdat ik een beginnend web programmeur ben.

Ik ben op het moment bezig met OOP Pagination. Alles werkt prima behalve 1 ding. Als ik op vorige druk bij de pagination balk gaat de pagina mooi van bijv pagina 2 naar 1.
maar als ik volgende drukt om naar de volgende pagina te gaan, krijg ik ineens de melding "De query niet goed ontvangen." ik heb zelf geen idee waarom die melding er komt...

Ik hoop dat jullie misschien mij even een tip kan geven of een duwtje in de juiste richting.

Hier is de code die ik dusver heb
-------------------------------------------------------------
weergeven producten


Code (php)
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<?php
require_once('pagination_class.php');
require_once ('product_class.php');

      if( isset( $_GET['page']))
        {
            $page = $_GET["page"];
        }
        else
        {
            $page = 1;
        }

       $per_page = 4;
      $total_count = $product::count_all();
      // $total_count = 4;
       //echo $total_count;
  
      
        $pagination = new Pagination( $page, $per_page, $total_count);        
        if(isset ($_GET['action']))
        {
            //echo"test1234";
            switch ( $_GET["action"])
            {
                case"verwijderen":
                   $product::remove_from_product( $_GET["id"]);
                  
                    header("localtion:weergeven_producten.php?page='.$page");
                    echo"verwijder record";
                    break;
                default:
            }
        }
        else
        {
                $product::find_all_limit_offset($pagination->get_per_page(), $pagination->offset() );
        }
if ( $pagination->has_prev_page())
{
    ?>


<a href =weergeven_producten.php?page=
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<?php
     echo $pagination ->prev_page().">prev  </a>";
}
 else
{
    //echo $pagination->total_pages();
}


for ($i = 1; $i <= $pagination->total_pages(); $i++)
{
//<a href="weergeven_producten.php?page=2'
    if($i == $page)
    {
        echo"<a href='weergeven_producten.php?page=".$i."'><b> ".$i." </b></a>";
    }
    else
    {    
        echo"<a href='weergeven_producten.php?page=".$i."'> ".$i." </a>";
    }
}


if ( $pagination->has_next_page())
{
?>

<a href =weergeven_producten.php?page=
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<?php
     echo $pagination->next_page().">next </a>";    
}
 else
{
    //echo $pagination->total_pages();
}

?>

-------------------------------------------------------------
product class


Code (php)
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<?php
//echo"test";
include_once("MySQLDatabase_class.php");
$product = new product_class();

class product_class
{
        //fields
        
        private $id;
        private $merk;
        private $productnaam;
        private $prijs;
        private $fotonaam;
        
        //properties
        
        public function get_id(){return $this->id;}
        public function get_merk(){return $this->merk;}
        public function get_productnaam(){return $this->productnaam;}
        public function get_prijs(){return $this->prijs;}
                
                public function get_offset(){return $this->offset;}
        public function get_limit(){return $this->limit;}
        //public function get_fotonaam(){return $this->fotonaam;}
        
              
        //constructor
        public function __construct($id='', $productnaam='', $merk='', $prijs='')
        {
        
            $this->id =$id;
            $this->productnaam =$productnaam;
                        $this->merk =$merk;
            
            $this->prijs =$prijs;
            //$this->fotonaam =$fotonaam.'';
        }
        

        
        //methods
        
        public static function find_by_sql( $query )
        {
            global $database;
            $result_set= $database->fire_query( $query );
                   //     echo"test2";
            $user_array = array();
            while ( $row = mysqli_fetch_array($result_set))
            {
                $object = new product_class();
                $object->id = $row["id"];
                $object->productnaam = $row ["productnaam"];
                                $object->merk = $row["merk"];
                $object->prijs = $row ["prijs"];
                $user_array[] = $object;
            }
            return $user_array;
        }
                
    public static function remove_from_product( $id )
    {
        global $database;
        $query = "delete from `producten` where `id` = '".$id."'";
        $database->fire_query($query);
        
    }
        
        /* public static function find_all()
        {
            $query = "select * from 'producten'";
            $return self::find_by_sql($query);
        }*/
                  
                    Public static function find_by_id( $id)
                    {
                        $query = "select * from `product` where `id` = '".$id."'";
                        array_shift(self::find_by_sql( $query));
                    }
                
               public static function find_all_limit_offset( $limit, $offset)
                {
                  

                     $query = " SELECT * FROM `producten` " . " LIMIT $offset, $limit";              
                   echo"<table border='1'>
                    <tr>
                    <th>id</td>
                    <th>productnaam</td>
                    <th>merk</td>
                    <th>prijs</td>
                    <th>verwijder</td>
            
                    <tr/>";

                    foreach ( self::find_by_sql($query) as $product)                  
                        {
                     echo" <tr>

                    <td>".$product->id."</td>
                    <td>".$product->productnaam."</td>                    
                    <td>".$product->merk."</td>
                   <td>".$product->prijs."</td>
                      
                    <td><a href='weergeven_producten.php?action=verwijderen&id=".$product->id."'> X </a></td>
                    
                    </tr>";
                    }
                    
                    echo"</table>";}

                public static function uploaden_foto($fotonaam)
                {
                    $mime_type= array('image/jpeg',
                                        'image/pjpeg',
                                        'image/png',
                                        'image/gif',
                                        'image/x-png');
                    
                    if(in_array( $fotonaam['type'], $mime_type))
                    {
                        if( !file_exists($dir))
                        {
                            mkdir($dir);
                        }
                        if( !file_exists($dir."thumbnails/"))
                        {
                          mkdir($dir."thumbnails/");
                        }
                        if (is_uploaded_file( $fotonaam['tmp_name']))
                        {
                            move_uploaded_file($fotonaam['tmp_name'], $dir.$fotonaam['name']) ;
                        }
                        
                                
                    }
                    else
                    {
                    echo"het geuploade bestand heeft een niet geoorloofde extensie";
                    }
                }
                
               /* public static function count_all()
                {
                    global $database;
                    $query = "SELECT *
                    FROM  `producten`
                    LIMIT 0 , 30 ";
                    $result = $database->fire_query($query);
                  
                   return mysql_num_rows($result);
                    
                    
                }*/
                
        public static function count_all()
    {
        global $database;
        $query = "select count(*) from `producten`";
        $recordset = $database->fire_query($query);
        $row  = mysqli_fetch_array($recordset);
        $aantal = array_shift($row);
        return $aantal;        
    }
                
                public static function upload_thumbnail ($fotonaam )
                {
                    define("thumb_size", 80);
        //     $path_foto = "Plaatje/".$fotonaam["name"];
                    $path_foto = "plaatjes/".$fotonaam["name"];
                    $path_thumbnail = "plaatjes/thumbnails/tn_".$fotonaam["name"];
                    
                    $foto_afmeting = getimagesize( $path_foto);
                    $foto_verhouding = $foto_afmeting[0]/$foto_afmeting[1];
                  
                    if($foto_verhouding >= 1 )
                   {
                    
                        $tn_height = thumb_size;
                        $tn_width = $tn_height * $foto_verhouding;
                      
                   }
                   else
                   {
                        $tn_height = thumb_size;
                        $tn_width = $tn_height * $foto_verhouding;
                   }
                  
        switch ($fotonaam['type'])
        {
            case 'image/jpeg':
                $surce = imagecreatefromjpeg($patch_foto);
                imagecopyresampled ($thumb, $source, 0, 0, 0, 0, $tn_width,
                                    $tn_heigth, $foto_afmeting[0],
                                    $foto_afmeting[1]);
                imagejpeg($thumb, $path_thumbnail, 100);
                break;
            default:
                echo "het bestand met deze extensie kan niet worden geupload";
                            echo"<br />";
        }
                    
                    
                }

        public static function insert_into_product($merk, $productnaam, $prijs, $fotonaam)
        {    
            Global $database;
            $query = "insert into 'producten'( 'id', 'merk', 'productnaam', 'prijs','fotonaam')
                            
            values ( null, '".$merk."','".$productnaam."','".$prijs."','".$fotonaam."')";
            
            $database->fire_query($query);
                                    
        }
    }

?>

-------------------------------------------------------------
Pagination class


Code (php)
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<?php

class Pagination
{

    private $current_page;
    private $per_page;
    private $total_count;
    
    //properties
    
    public function get_per_page() {return $this->per_page;}
    
    public function get_current_page() {return $this->current_page;}
    
    public function get_total_count() {return $this->total_count;}
    
    //constructor
    
    public function total_pages()
    {
         return ceil ($this->total_count / $this->per_page);
         //return ceil ($this->total_count / $this->$per_page);
    }
    
    public function __construct( $page, $per_page, $total_count )
    {
        $this->current_page = $page;
        $this->per_page = $per_page;
        $this->total_count = $total_count;
        
        //echo $this->current_page."test dit is de pagination current page";
    }
    
    public function offset()
    {
           return ($this->current_page - 1) * $this->per_page;
    }
    
    public function next_page()
    {
        
        return ($this->current_page +1);
        
    }
    
        public function prev_page()
    {
        return ($this->current_page -1);
    }
    
    public function has_next_page()
    {
        
        return ($this->current_page < $this->total_pages() );
    }
    
    public function has_prev_page()
    {
        return ($this->current_page > 1 );
    }
}
?>
 
PHP hulp

PHP hulp

25/11/2024 03:05:57
 
Ozzie PHP

Ozzie PHP

12/10/2011 22:13:51
Quote Anchor link
Zou je alleen RELEVANTE code willen plaatsen. Dit is echt veel te veel code.
 
Sander Heuv

Sander Heuv

12/10/2011 22:27:05
Quote Anchor link
probleem is al opgelost post kan gesloten worden
 



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