Script kullanıyorum email zorunluluğu problemi

<?php
    if(! defined('BASEPATH') ){ exit('Unable to view file.'); }

    $can_withdraw = 1;
    if($config['proof_required'] == 1){
        $check = $db->QueryGetNumRows("SELECT a.id FROM requests a LEFT JOIN payment_proofs b ON b.p_id = a.id WHERE (a.user = '".$data['id']."' AND a.paid = '1') AND (a.proof = '0' OR b.approved = '0')");
        if($check > 0){
            $can_withdraw = 0;
        }
    }
    
    $errMessage = '';
    if(isset($_POST['submit'])){
        $cash = $db->EscapeString($_POST['cash']);
        $pemail = $db->EscapeString($_POST['email']);
        $gateway = $db->EscapeString($_POST['gateway']);

        $valid = false;
        if($gateway == 'paypal' && $config['paypal_status'] == 1){
            $valid = true;
        }elseif($gateway == 'payeer' && $config['payeer_status'] == 1){
            $valid = true;
        }elseif($gateway == 'bitcoin' && $config['cp_status'] == 1){
            $valid = true;
        }
        
        if($valid){
            if(!$can_withdraw) {
                $errMessage = '<div class="alert alert-danger" role="alert">'.$lang['b_318'].'</div>';
            }elseif(!is_numeric($cash) || $cash < $config['pay_min']){
                $errMessage = '<div class="alert alert-danger" role="alert">'.lang_rep($lang['b_98'], array('-MIN-' => $config['pay_min'])).'</div>';
            }elseif(time()-(86400*$config['aff_reg_days']) < strtotime($data['signup'])){
                $errMessage = '<div class="alert alert-danger" role="alert">'.lang_rep($lang['b_243'], array('-DAYS-' => $config['aff_reg_days'])).'</div>';
            }elseif($_POST['cash'] > $data['account_balance']){
                $errMessage = '<div class="alert alert-danger" role="alert">'.$lang['b_99'].'</div>';
            }elseif(!isEmail($_POST['email'])){
                $errMessage = '<div class="alert alert-danger" role="alert">'.$lang['b_100'].'</div>';
            }else{
                $clicks = $db->QueryFetchArray("SELECT SUM(`total_clicks`) AS `total_clicks` FROM `user_clicks` WHERE `uid`='".$data['id']."'");
                if($clicks['total_clicks'] < $config['aff_req_clicks']){
                    $errMessage = '<div class="alert alert-danger" role="alert">'.lang_rep($lang['b_324'], array('-NUM-' => $config['aff_req_clicks'], '-DONE-' => $clicks['total_clicks'])).'</div>';
                }else{
                    $db->Query("INSERT INTO `requests` (user, paypal, amount, date, gateway) VALUES('".$data['id']."', '".$pemail."', '".$cash."', NOW(), '".$gateway."')");
                    $db->Query("UPDATE `users` SET `account_balance`=`account_balance`-'".$cash."' WHERE `id`='".$data['id']."'");            
                    $errMessage = '<div class="alert alert-success" role="alert">'.$lang['b_101'].'</div>';
                } 
            }
        }
    }
?> 
    <main role="main" class="container">
      <div class="row">
        <?php 
            require_once(BASE_PATH.'/template/'.$config['theme'].'/common/sidebar.php');
        ?>
      <div class="col-md-9">
            <div class="my-3 ml-md-2 p-3 bg-white rounded box-shadow box-style">
                <?=$errMessage?>
                <div id="blue-box">
                    <div class="title">
                        <?=$lang['b_97']?>
                    </div>
                    <div class="content">
                        <form method="post">
                          <div class="form-row">
                            <div class="form-group col-md-6">
                              <label for="cash"><?=$lang['b_103']?> (<?=get_currency_symbol($config['currency_code'])?>)</label></label>
                              <div class="input-group mb-2 mr-sm-2">
                                <div class="input-group-prepend"><div class="input-group-text"><i class="fa fa-credit-card"></i></div></div>
                                <input type="text" class="form-control" id="cash" name="cash" placeholder="<?=$config['pay_min']?>">
                              </div>
                            </div>
                          </div>
                          <div class="form-row">
                            <div class="form-group col-md-6">
                              <label for="email">Papara No</label>
                              <div class="input-group mb-2 mr-sm-2">
                                <div class="input-group-prepend"><div class="input-group-text"><i class="fa fa-credit-card"></i></div></div>
                                <input type="text" class="form-control" id="email" name="papara" placeholder="papara numaran覺z">
                              </div>
                            </div>
                            <div class="form-group col-md-6">
                              <label for="gateway">Banka</label>
                              <select id="gateway" name="gateway" onchange="setSelect()" class="custom-select">
                                <?php if($config['paypal_status'] == 1){ ?><option value="paypal">Papara</option><?php } ?>
                                <?php if($config['payeer_status'] == 1){ ?><option value="payeer">Payeer</option><?php } ?>
                                <?php if($config['cp_status'] == 1){ ?><option value="bitcoin">Bitcoin</option><?php } ?>
                              </select>
                            </div>
                          </div>
                          <p><input type="submit" class="btn btn-primary d-inline" name="submit" value="<?=$lang['b_58']?>" /></p>
                        </form>
                    </div>
                </div>
                <div id="blue-box" class="p-2 mt-2"><?=lang_rep($lang['b_102'], array('-SUM-' => $config['pay_min']))?></div>
                <div id="blue-box" class="mt-2">
                    <div class="title">
                        <?=$lang['b_257']?>
                    </div>
                    <div class="content">
                        <table class="table table-striped table-sm table-responsive-sm">
                            <thead class="thead-dark">
                                <tr>
                                    <th width="20">#</td>
                                    <th>Miktar</th>
                                    <th>Papara No</th>
                                    <th>Banka</th>
                                    <th>Tarih</th>
                                    <th>Durum</th>
                                    <th>Kan覺t</th>
                                </tr>
                            </thead>
                            <tfoot class="thead-dark">
                                <tr>
                                    <th>#</td>
                                    <th><?=$lang['b_103']?></th>
                                    <th><?=$lang['b_105']?></th>
                                    <th><?=$lang['b_258']?></th>
                                    <th><?=$lang['b_106']?></th>
                                    <th><?=$lang['b_75']?></th>
                                    <th><?=$lang['b_315']?></th>
                                </tr>
                            </tfoot>
                            <tbody class="table-primary text-dark">
                            <?php
                                $requests = $db->QueryFetchArrayAll("SELECT id,amount,paypal,date,paid,gateway,reason,proof FROM `requests` WHERE `user`='".$data['id']."' AND `gateway`!='accb' ORDER BY `date` DESC LIMIT 10");
                                if(!$requests){ 
                                    echo '<tr><td colspan="7" align="center"><b>'.$lang['b_250'].'</b></td><tr>';
                                }else{
                                    foreach($requests as $request){
                            ?>    
                                <tr>
                                    <td><?=$request['id']?></td>
                                    <td><?=$request['amount'].get_currency_symbol($config['currency_code'])?></td>
                                    <td><?=(!empty($request['paypal']) ? $request['paypal'] : 'N/A')?></td>
                                    <td><?=ucfirst($request['gateway'])?></td>
                                    <td><?=$request['date']?></td>
                                    <td><?=($request['paid'] == 0 ? '<span class="text-info">'.$lang['b_107'].'</span>' : ($request['paid'] == 2 ? '<span class="text-danger" title="'.$request['reason'].'">'.$lang['b_108'].'</span>' : '<span class="text-success">'.$lang['b_109'].'</span'))?></td>
                                    <td><?=($request['proof'] == 0 && $request['paid'] == 1 ? '<a href="'.GenerateURL('proofs&upload='.$request['id']).'">'.$lang['b_316'].'</a>' : ($request['proof'] == 1 && $request['paid'] == 1 ? '<span class="text-green">'.$lang['b_317'].'</span>' : 'N/A'))?></td>
                                </tr>
                            <?php }} ?>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
      </div>
    </main>