MySQL Query pagination with PHP -

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how can add pagination system simple item display? , how can add pagination results filter? lost part , cant figure out! want apply css on menu too!

here's code:

<?php                 include('db.php');                 if(isset($_post['filter']))                 {                     $filter = $_post['filter'];                     $result = mysql_query("select * products product '%$filter%' or description '%$filter%' or category '%$filter%'");                 }                 else                 {                     $result = mysql_query("select * products");                 }                 while($row=mysql_fetch_assoc($result))                 {                     echo '<li class="portfolio-item2" data-id="id-0" data-type="cat-item-4">';                     echo '<div>                     <span class="image-block">                     <a class="example-image-link" href="reservation/img/products/'.$row['imgurl'].'" data-lightbox="example-set" title="'.$row['product'].'""><img width="225" height="140" src="reservation/img/products/'.$row['imgurl'].'" alt="'.$row['product'].'" title="'.$row['product'].'" />                                         </a>                     </span>                     <div class="home-portfolio-text">                     <h2 class="post-title-portfolio"><font color="#666666">'.$row['product'].'</font></h2>                     <p class="post-subtitle-portfolio"><font color="#666666">descrição: '.$row['description'].'                     <p class="post-subtitle-portfolio"><font color="#666666">categoria: '.$row['category'].'                     <p class="post-subtitle-portfolio">código: '.$row['price'].'</p><br/></font></p>                     </div>                     </div>';                     echo '</li>';                 }                 ?>

edited:

<?php                 include('db.php');                 if(isset($_post['filter']))                 {                     $filter = $_post['filter'];                     $result = mysql_query("select * products product '%$filter%' or description '%$filter%' or category '%$filter%'");                 }                 else                 { $start=0; $limit=6;  if(isset($_get['id'])) {     $id = $_get['id'];     $start = ($id-1)*$limit; }  $result = mysql_query("select * products limit $start, $limit");                 } while($row = mysql_fetch_array($result)) {     echo '<li class="portfolio-item2" data-id="id-0" data-type="cat-item-4">';                     echo '<div>                     <span class="image-block">                     <a class="example-image-link" href="reservation/img/products/'.$row['imgurl'].'" data-lightbox="example-set" title="'.$row['product'].'""><img width="225" height="140" src="reservation/img/products/'.$row['imgurl'].'" alt="'.$row['product'].'" title="'.$row['product'].'" />                                         </a>                     </span>                     <div class="home-portfolio-text">                     <h2 class="post-title-portfolio"><font color="#666666">'.$row['product'].'</font></h2>                     <p class="post-subtitle-portfolio"><font color="#666666">descrição: '.$row['description'].'                     <p class="post-subtitle-portfolio"><font color="#666666">categoria: '.$row['category'].'                     <p class="post-subtitle-portfolio">código: '.$row['price'].'</p><br/></font></p>                     </div>                     </div>';                     echo '</li>'; } echo "</ul>";   $rows = mysql_num_rows(mysql_query("select * products")); $total = ceil($rows/$limit);  if($id>1) {     echo "<center><a href='?id=".($id-1)."' class='button'>anterior</a></center>"; } if($id!=$total) {     echo "<center><a href='?id=".($id+1)."' class='button'>próximo</a></center>"; }  ?>

you should have this:

// declare base query $q = "select * products"; if(isset($_post['filter'])) {     $filter = $_post['filter'];     // append filter query     $q += "where product '%$filter%' or description '%$filter%' or category '%$filter%'"); } // check "page" url parameter, if not available, go first page $page = isset($_get['page']) ? $_get['page'] : 1; // check "pagesize" url parameter, if not available, fall 20 $pagesize = isset($_get['pagesize']) ? $_get['pagesize'] : 20; // append pagination query $q += sprintf("limit %d,%d;", ($page-1)*$pagesize, $pagesize); // execute constructed query $result = mysql_query($q);

note code "pseudoish", not tested, should give base idea.

also, can check this post pagination mysql.

update

in php if use uninitialized variable, have context-dependent default value. see documentation here. here extract:

it not necessary initialize variables in php practice. uninitialized variables have default value of type depending on context in used - booleans default false, integers , floats default zero, strings (e.g. used in echo) set empty string , arrays become empty array.


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