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I created a form which will be entered by user

<form id="wc-form-return" action="" method="post">

  <label><?php _e('Select products for return','wc_return') ?></label>

  <select id="wc_products" name="wc_products" class="wc_products" multiple="multiple">

    <?php

    if ( sizeof( $products ) > 0 ) { 

      foreach( $products as $item ) { ?>

        <option value="<?php echo $item['item_meta']['_product_id'][0]; ?>"><?php echo __(esc_html($item['name']), 'wc_return'); ?></option>

      <?php 

      }

    }

    ?>

  </select>

  <small><?php _e('You can select multiple by holding down the CMD or Ctrl key.','wc_return'); ?></small>

  <textarea name="wc_message" id="wc_message" cols="30" rows="10" placeholder="<?php _e('Explain the reasons for your return', 'wc_return') ?>"></textarea>

  <input type="hidden" name="order" value="<?php echo $order->id; ?>" />

  <input type="hidden" name="customer" value="<?php echo $order->billing_email; ?>" />

  <input type="text" name="phone" id="wc_phone" value="<?php echo $order->billing_phone; ?>" />

  <input type="checkbox" name="check1" value="Yes" required>Accept our <a href="https://sabkishop.in/return"> return and exchange policy </a> </br>

  <input type="submit" name="submit" value="<?php _e('Submit','wc_return'); ?>" />

</form>

It will be entered by user and we will be sent to given email (that is already setted up)

Now to give these information in email i used

$note_form_email = '';

    if ( $_POST['wc_message'] != '' ) {

      $note .= '<br><br>';

      $note .= '<p>'.__('And the explanation:', 'wc_return').'</p>';

      $note_form_email .= '<p>'.__('And the explanation:', 'wc_return').'</p>';

      $note .= apply_filters( 'the_content', $_POST['wc_message'] );

      $note_form_email .= apply_filters( 'the_content', $_POST['wc_message'] );

      $note .= '<p>'.__('Customer details:', 'wc_return').'</p>';

      $note_form_email .= '<p>'.__('Customer details:', 'wc_return').'</p>';

      $note .= '<p>'.__('Customer phone:','wc_return').'</p>';

      $note_form_email .= '<p>'.__('Customer phone:','wc_return').'</p>';

      $note .= apply_filters('the_content', $_POST['wc_phone'] );

      $note_form_email .= apply_filters('the_content', $_POST['wc_phone'] );

    }

But output was like this

And the explanation:

Huhhh

Customer details:

Customer phone:

That 'Huhhh' was written by user on wc_message. He also wrote wc_phone but it was not showing in email. Wc_message is working properly but wc_phone isnt. What am i doing wrong?