php - Search query shows all results when clicking search button -

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i got simple search query works, shows results when search button clicked without search input.

it shows results parent_id 26 or cattid 26 want prevent in query. why still showing results id's , how can prevent every result appearing on result page when there no search input?

how build:

html:

<li>     <div class="mn-wrap">         <form method="post" class="form" action="zoeken/">             <div class="search-wrap">                 <button class="search-button animate" type="submit" title="start zoeken">                     <i class="fa fa-search"></i>                 </button>                 <input type="text" name="zoekterm" class="form-control search-field" placeholder="zoek...">             </div>         </form>     </div> </li>

.htaccess:

rewriterule         ^zoeken/ /zoeken.php?zoeken=1 [l]

queries:

if ($_get['zoeken'] != '') {      $zoekterm = $_post['zoekterm'];      // zoeken     $zoeken    = "select * `lb_content` catid not in ('1', '26', '27', '28') ,  introtext '%".$conn->real_escape_string($zoekterm)."%' or title '%".$conn->real_escape_string($zoekterm)."%'";     $zoekencon = $conn->query($zoeken);     $zoekeni   = array();     while ($zoekeni[] = $zoekencon->fetch_array());      // zoeken c     $zoekc    = "select * `lb_categories` parent_id not in ('1', '26', '27', '28') , level = 2 , description '%".$conn->real_escape_string($zoekterm)."%' or title '%".$conn->real_escape_string($zoekterm)."%'";     $zoekccon = $conn->query($zoekc);     $zoekci   = array();     while ($zoekci[] = $zoekccon->fetch_array()); }

and result page:

<div class="row multi-columns-row alt-features-grid">      <?      $aantal = count($zoekeni) + count($zoekci) - 2;      if($aantal == 0){          echo '<div class="col-sm-6 col-md-4 col-lg-4">                     <div class="alt-features-item align-center">                         <div class="alt-features-icon">                         </div>                         <h3 class="alt-features-title font-alt">er zijn geen resultaten</h3>                     </div>                 </div>';     }      if($zoekeni[0]['id']){         foreach ($zoekeni $resultaat) {              if($resultaat['introtext']){                  echo '                      <div class="col-sm-6 col-md-4 col-lg-4">                         <div class="alt-features-item align-center">                             <div class="alt-features-icon">                             </div>                             <h3 class="alt-features-title font-alt">'.$resultaat['title'].'</h3>                             <div class="alt-features-descr align-left">                                 '.introtext($resultaat['introtext']).'<br><br>                                  <div class="align-right">                                     <a href="'.$resultaat['alias'].'.html" style="text-decoration:none">lees meer</a>                                 </div>                             </div>                         </div>                     </div>                  ';              }          }     }       if($zoekci[0]['id']){         foreach ($zoekci $resultaat) {              if($resultaat['description']){                  echo '                      <div class="col-sm-6 col-md-4 col-lg-4">                         <div class="alt-features-item align-center">                             <div class="alt-features-icon">                             </div>                             <h3 class="alt-features-title font-alt">'.$resultaat['title'].'</h3>                             <div class="alt-features-descr align-left">                                    '.introtext($resultaat['description']).'<br><br>                                  <div class="align-right">                                     <a href="'.$resultaat['alias'].'.html" style="text-decoration:none">lees meer</a>                                 </div>                             </div>                         </div>                     </div>                  ';              }          }     }      ?>  </div>


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