mysql - If value already exists in array then issue an error in PHP -


i have code wherein checks if value exists in array. basically, program first stores values in array. checked using count(array_keys) function. there 3 inputs. if in 3 inputs, value occurs twice or thrice, issue error. now, problem if input , input b same input c different, still add database, if input , c same input b different not add (which correct).

here php code:

<?php include 'config.php'; if(isset($_post['update_actual_lupong'])){     $id = isset($_get['id'])? $_get['id'] : "";     $id_hearing = $_post['hearing_lup'];     $lupong = $_post['act_lupong'];     $actual = array();      foreach($lupong $aaa) {             $actual[] = $aaa;     }      if ((count(array_keys($actual, $aaa)) > 1)) {              echo '<br><br>this array contains duplicate <br><br>';     }     else {          foreach ($lupong $lup) {             $updatememo = mysqli_query($conn, "insert actuallupong(hearing_idhearing, bar_pos2) values ('$id_hearing', (select idtable_position table_position person_idperson = '$lup'));");         }          echo "added ggg";     }      //header ('location: view_case_profile.php?id='.$id);     mysqli_close($conn); }    ?>

html code (it's in modal):

<div class="modal fade bs-example-modal-lg" id="modal_lupong" data-backdrop="static" data-keyboard="false" tabindex="-1" role="dialog" aria-labelledby="mymodallabel" aria-hidden="true" > <div class="modal-dialog modal-lg">         <div class="modal-content">             <div class="modal-header">                 <button type="button" class="close" data-dismiss="modal">                 <span aria-hidden="true">&times;</span>                 <span class="sr-only">close</span>                 </button>                 <h4 class="modal-title" id="mymodallabel">update lupong</h4>             </div>         <form id="update_actual_lupong" class="form-horizontal form-label-left calender" name = "update_actual_lupong" enctype="multipart/form-data" method="post" role="form" novalidate>             <div class="modal-body">                 <div class="d item form-group">                     <label class="col-sm-3 control-label">hearing number</label>                         <div class="col-sm-7">                             <input type="number" class="form-control" id="hearing_lup" name="hearing_lup" readonly="readonly"/>                         </div>                 </div>             <div class="f item form-group" id = "act1">                 <label class="control-label col-md-3 col-sm-3 col-xs-12">lupong 1 <span class="required">*</span></label>                 <div class="col-sm-7">                     <input name="actlupong[]" id="search_keyword_id_act" class="search_keyword_act form-control col-md-7 col-xs-12" required="required" placeholder ="search first name or last name... " type="text">                         <input type="hidden" name="act_lupong[]" id="act_lup1"/>                         <div id="result3"></div>                 </div>         </div>          <div class="f item form-group" id = "act2">             <label class="control-label col-md-3 col-sm-3 col-xs-12">lupong 2 <span class="required">*</span></label>                 <div class="col-sm-7">                     <input name="actlupong[]" id="search_keyword_id_act1" class="search_keyword_act1 form-control col-md-7 col-xs-12" required="required" placeholder ="search first name or last name... " type="text">                     <input type="hidden" name="act_lupong[]" id="act_lup2"/>                 <div id="result4"></div>             </div>         </div>          <div class="f item form-group" id = "act3">             <label class="control-label col-md-3 col-sm-3 col-xs-12">lupong 3 <span class="required">*</span></label>                 <div class="col-sm-7">                     <input name="actlupong[]" id="search_keyword_id_act2" class="search_keyword_act2 form-control col-md-7 col-xs-12" required="required" placeholder ="search first name or last name... " type="text">                     <input type="hidden" name="act_lupong[]" id="act_lup3"/>                     <div id="result5"></div>                 </div>             </div>          </div>             <div class="modal-footer" style="margin:0;">                 <button type="button" class="btn btn-default" data-dismiss="modal" style="margin-top: 4px;">close</button>                 <button id="send" type="submit" class="btn btn-success" name="update_actual_lupong">save record</button>         </div>     </form>     </div>     </div>     </div>

screenshot: enter image description here

what seems wrong in code? part should change? appreciated. thank you.

as said:- there 3 inputs. if in 3 inputs, value occurs twice or thrice, issue error.

a bit modification code needed:-

<?php include 'config.php'; if(isset($_post['update_actual_lupong'])){     $id = isset($_get['id'])? $_get['id'] : "";     $id_hearing = $_post['hearing_lup'];     $lupong = $_post['act_lupong'];     if (count(array_unique($lupong)) < count($lupong))) {  // check count of unique $lupong , original $lupong equal or not if not $lupong have duplicate values             echo '<br><br>this array contains duplicate <br><br>';     }     else {          foreach ($lupong $lup) {             $updatememo = mysqli_query($conn, "insert actuallupong(hearing_idhearing, bar_pos2) values ('$id_hearing', (select idtable_position table_position person_idperson = '$lup'));");         }          echo "added ggg";     }      //header ('location: view_case_profile.php?id='.$id);     mysqli_close($conn); }    ?>

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