foreach($cek['ozellik_ozellik'] as $row){
    $check = false;
    foreach($ilan['ilan_ozellik']  as $key => $value){
        $key = str_replace("_"," ",$key);
        if($key == $row){
            $check = true;
        }
    }?>
    <label class="custom-switch mt-5 mb-3">
    <input type="checkbox" name="<?php echo $row; ?>" class="custom-switch-input" <?php if($check) echo "checked"; ?>>
    <span class="custom-switch-indicator"></span>
    <span class="custom-switch-description"><?php echo $row; ?></span>
    </label>
<?php }