Qfyilyi

I use the following to POST a new file and works fine:

HTML

<div class="row">

    <div class="col-xs-12">

        <form method="POST" action="" enctype="multipart/form-data">

            <div class="form-group">

                <input type="file" name="postImage" multiple="multiple" class="form-control">

            </div>

            <input id="uploadImg" name="uploadImgCustom" type="submit" value="AGGIORNA ALLEGATO" class="btn secondary-btn primary-bg">

        </form>

    </div>

</div>

UPLOAD LOGIC

$myNewImg = get_post_meta($id, 'usp-file-single', true);

if (isset($_POST['uploadImgCustom'])) {

    $myNewImg = $_POST['uploadImgCustom'];

}

$attachments = get_posts(array( 

    'post_type' => 'attachment',

    'numberposts' => -1,

    'post_status' =>'any',

    'post_parent' => $id

));



if ($attachments) {

    foreach ( $attachments as $attachment ) {

        $myNewImg = wp_get_attachment_url( $attachment->ID );

        update_post_meta( $id, 'usp-file-single', $myNewImg);

    } 

    $pathtofile = $myNewImg;

    $info = pathinfo($pathtofile);

    if ( ($info["extension"] == "jpg") || ($info["extension"] == "png") ) { ?>

        <a href="<?php the_permalink(); ?>">

            <img src="<?php echo $myNewImg; ?>" class="bnr_img img-responsive center-block" alt="">

        </a>

    <?php } else { 

        // Get the Video Fields

        $video_mp4 =  get_post_meta($id, 'usp-file-single', TRUE);

        // Build the  Shortcode

        $attr =  array(

            'mp4'      => $video_mp4,

            'webm'     => $video_webm,

            'flv'      => $video_flv,

            'poster'   => $video_poster,

            'preload'  => 'auto',

            'autoplay' => "off"

        );

        // Display the Shortcode

        echo wp_video_shortcode(  $attr );

    } 

}

POST CHECK

if($_SERVER['REQUEST_METHOD']=="POST") {

  if ('AGGIORNA ALLEGATO' === ($_POST['uploadImgCustom'])) {

    if ($_FILES['postImage']) {

        $attachments = get_attached_media( '', $id );

        foreach ($attachments as $attachment) {

            wp_delete_attachment( $attachment->ID, 'true' );

        }   

        foreach ($_FILES as $file => $array) {

            if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) {

           //Add your error action

            } else {    

                $attach_id = media_handle_upload( $file, $id );

                $myNewImg = get_post_meta($id, 'usp-file-single', true);

            }

        }   

    }

  }

}

I tried to place the following before the html form

$myNewImg = get_post_meta($id, 'usp-file-single', true);

if (isset($_POST['uploadImgCustom'])) {

    $myNewImg = $_POST['uploadImgCustom'];

}

However the page refreshes after the POST but I see the old value, if I manually refresh after the post refresh, I can see the new value tho. Am I using wrongly if isset?

Thanks to a suggestion in comment, I eventually created a page refresh like this:

<?php

    $myNewUploaded = get_post_meta($id, 'usp-file-single', true);

    if (isset($_POST['uploadImgCustom'])) {

        $myNewImg = $_POST['postImage'];

        ob_start(); //this should be first line of your page

        $myurl = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

        header('Location: '.$myurl);

        ob_end_flush(); //this should be last line of your page

    }

?>

<form method="POST" action="" enctype="multipart/form-data">.....

Try using this

   $myNewImg = get_post_meta($id, 'usp-file-single', true);

    if (!isset($_POST['uploadImgCustom'])) {

    $myNewImg = $_POST['uploadImgCustom'];

    }