wp_generate_attachment_metadata returns empty array

  • Hello,

    I receive a empty array when i use wp_generate_attachment_metadata and this function do not generates the intermediate images.

    I am adding images using wp_handle_uploads and this works fine. This generates a attach_id that I use with the function wp_generate_attachment_metadata.
    I get no errors or warnings in the error_reporting log.

    I am using WMPU(multisite) wordpress and I no longer know what to do…

    $i=0;
$imgpath =wp_upload_dir();
require_once( ABSPATH . 'wp-admin/includes/image.php' );
foreach ($images as $key) {
  //$images[]   <-- images url in the default upload dir
  if($key == 'error')continue;
$path = $imgpath['path'].'/'.basename($key);
$attachment = array(
                'guid' => $key, //url
                'post_mime_type' => image_type_to_mime_type(exif_imagetype($key)),
                'post_title' => sanitize_file_name(basename($key)),
                'post_content' => '',
                'post_status' => 'inherit'
                );

 $attach_id = wp_insert_attachment( $attachment,$path, $pid );
  $attach_dat = wp_generate_attachment_metadata( $attach_id, $path);

  if(!empty($attach_dat))wp_update_attachment_metadata($attach_id, $attach_dat);

 if($i==0) set_post_thumbnail( $pid, $attach_id );
 $i++;
}

    That was coded in a non template-file, where i load WP with
    require_once($_SERVER['DOCUMENT_ROOT']."/test/site0/wp-config.php");
    I not sure it influences in something.

Viewing 6 replies - 1 through 6 (of 6 total)
  • Thread Starter Gabriel

    (@gafma)

    Thread Starter Gabriel

    (@gafma)

    Moderator bcworkz

    (@bcworkz)

    If you’re going to load WP that way (which is highly discouraged), start with wp-load.php. Without that, ABSPATH is not correctly defined.

    Recommended ways to initiate code is either through plugins, page templates, AJAX, or through admin-post.php. But if you’re not expecting your code to work on a different installation, wp-load.php will work.

    If that doesn’t help, there’s probably a path problem somewhere, check them carefully. Avoid relative paths unless you’re absolutely sure what it’s relative to. Be sure the attachment ID actually belongs to a valid entry in the posts table.

    Thread Starter Gabriel

    (@gafma)

    I verified everything, but not looks like wrong.
    The image upload is done by two steps:
    First the images are dynamically send to server by dropzone. The script is very simple. That works fine.

    <?php
require_once($_SERVER['DOCUMENT_ROOT']."/test/site0/wp-load.php");

	if ( ! function_exists( 'wp_handle_upload' ) ) {
    require_once( ABSPATH . 'wp-admin/includes/file.php' );
}

if (!empty($_FILES)){

	$uploadedfile = $_FILES['file'];

$upload_overrides = array( 'test_form' => false );

$movefile = wp_handle_upload( $uploadedfile, $upload_overrides ); //put in wordpress default directory

if ( $movefile && !isset( $movefile['error'] ) ) {

				imsanity_handle_upload($movefile);  //plugin to resize image

    echo $movefile['url']; //response to front-side script
} else {
    /**
     * Error generated by _wp_handle_upload()
     * @see _wp_handle_upload() in wp-admin/includes/file.php
     */
    echo $movefile['error'];
}

	}
			?>

    In front-end, a input field holds the images urls returned by script above, separated by commas.
    When the formulary is submitted, those urls are processed by script I talked in first message. And that not work. Process the image, set the thumbnail but dont generate metadata.

    In another version, I process just one image send directly to file in form action. This one works, but i need the first one.

    $cont = 1;
            foreach ($_FILES['my_image_upload']['tmp_name'] as $key) {
              $title = ereg_replace("[^a-zA-Z0-9_]", "", strtr($_POST["vehicle_title"], "áà?aéêíó??úü?áà??éêíó??úü? ", "aaaaeeiooouucAAAAEEIOOOUUC_"));
              $content = file_get_contents($_FILES['my_image_upload']['tmp_name'][$key]);
              $ext = strtolower(substr($_FILES['my_image_upload']['name'][$key],-4));
              $title = substr($title,0,30);
                                                             //short the title 30 chars
              $title = $title . ++$cont . $ext;
              //adicionar a extens?o
              $upload_dir = wp_upload_dir();
              $aux = date('Y-m-d')."-".$title; //final title
                                           //add date to title
              $namae = $upload_dir['path']."/".$aux;       //mount path

              $file = fopen($namae,'x');
              fwrite($file,$content);
              fclose($file);
              //parameters for plugin Imsanity, thats resize image
              $params['type'] = image_type_to_mime_type(exif_imagetype($namae));
              $params['file'] = $namae;
              $params['url'] = $upload_dir['url']."/".$aux;

              imsanity_handle_upload($params); 

              $attachment = array(
               'guid' => $params['url'],
               'post_mime_type' => $params['type'],
               'post_title' => sanitize_file_name($aux),
               'post_content' => '',
               'post_status' => 'inherit'                );               

              $attach_id = wp_insert_attachment( $attachment, $params['file'], $pid );  

               //generate metadata
              require_once( ABSPATH . 'wp-admin/includes/image.php' );
              $attach_data = wp_generate_attachment_metadata( $attach_id, $params['file'] );
              wp_update_attachment_metadata( $attach_id, $attach_data );
              set_post_thumbnail( $pid, $attach_id );
                            }//END FOR EACH

    Dropzone reference

    Moderator bcworkz

    (@bcworkz)

    Be sure $uploadedfile is properly structured as $_FILES for multiple files. It’s quite common for this to be wrong, causing wp_handle_upload() to fail silently. The array structure that comes in from a typical multiple file HTML form field is typically wrong. All the names are in one sub-array, all the types in another, etc. Each sub-array should be the name, type, etc. for one file.
    https://php.net/manual/en/reserved.variables.files.php

    Thread Starter Gabriel

    (@gafma)

    Thanks until now bcworkz.

    It is unlikely to be this. The dropbox backend script that I informed, works in both versions of codes.

    I will verify again, but this script works fine.
    I check de default upload directory and the register in the wp_post table. THe image was correclty registered in WP.

    I saw in somewere that wp_generate_attachment_metadata searches the mime type through the attach_id. Well, is all right in wp_post, so the image was correctly register in wp. I still dont understand why wp_generate_attachment_metadata works in one script and no at in another.

    I will keep investigating.

Viewing 6 replies - 1 through 6 (of 6 total)
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