If the file uploaded then send the file name or else send empty in the PHP

I don't know I am doing my best or it will get issues in the future.

I have to display the 7 file type on my page and it will be increased in the future. So I have taken the array and store the label name and according to the label count, I am displaying the file type. So I have 7 labels in the array and I am getting 7 file types.

The below is the code I am using it.

<div class="input_fields_wrap">
      <?php
      $labelname = array('Label 1','Label 2','Label 3','Label 4','Label 5','Label 6','Label 7');
      $labelCount=count($labelname);
        ?>
   <div class="row mt-3">
      <?php 
      for ($i=0; $i < $labelCount; $i++) { 
       ?>
       <div class="col-lg-4 mb-4 ">
         <div class="documentUploadWrap">
            <label><?php echo $labelname[$i];?></label>

         <div class="upload_doc">
          <input type="hidden" name="docUploadLabel[]" value="<?php echo $labelname[$i];?>">
          <input type="file" name="docUpload[]"  class="fileupload">
          <input type="hidden" name="docUpload[]" value="">

          <div class="uploadInfo">
             <div class="upload_icon"></div>
             <p>Drop your image here, or <span>browse</span></p> 
             <span>Supports: JPEG, PNG, PPT, PPTX, PDF <br />Max Size: 5MB</span>
          </div>
       </div>
         </div>
      </div> 
    <?php } ?>

Now, I uploaded the file in the first two file type, and the rest 5 are empty. Then I hit the submit button and I am getting below error.

1)

2) Notice here If I upload 1 or 2 files the second name continues repeating till 7 iterations.

source https://stackoverflow.com/questions/67910198/if-the-file-uploaded-then-send-the-file-name-or-else-send-empty-in-the-php