Wie lege ich bei Verwendung von wp_insert_post () ein ausgewähltes Bild (Miniaturbild) anhand der Bild-URL fest?

Sie könnenein Bild als Post-Miniaturbildfestlegen,wennes sichin Ihrer Medienbibliothekbefindet. Umein Bildin Ihre Medienbibliothek aufzunehmen,müssen Siees auf Ihren Server hochladen. WordPress hatbereitseine Funktion zum Einfügen von Bildernin Ihre Medienbibliothek. Siebenötigen lediglichein Skript,das Ihre Datei hochlädt.

Verwendung:

 Generate_Featured_Image( '../wp-content/my_image.jpg', $post_id );

// $post_id is Numeric ID... You can also get the ID with:
wp_insert_post()
 

Funktion:

 function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))
      $file = $upload_dir['path'] . '/' . $filename;
    else
      $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}
 

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

BEARBEITEN: Pfaderstellung hinzugefügt

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg', $post_id );

// $post_id is Numeric ID... You can also get the ID with:
wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))
      $file = $upload_dir['path'] . '/' . $filename;
    else
      $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

Ichmöchte die Robs-Antwort verbessern,indemich die WP-Kernfunktionen download_url verwende und media_handle_sideload

 <?php
/**
* Downloads an image from the specified URL and attaches it to a post as a post thumbnail.
*
* @param string $file    The URL of the image to download.
* @param int    $post_id The post ID the post thumbnail is to be associated with.
* @param string $desc    Optional. Description of the image.
* @return string|WP_Error Attachment ID, WP_Error object otherwise.
*/
function Generate_Featured_Image( $file, $post_id, $desc ){
    // Set variables for storage, fix file filename for query strings.
    preg_match( '/[^\?]+\.(jpe?g|jpe|gif|png)\b/i', $file, $matches );
    if ( ! $matches ) {
         return new WP_Error( 'image_sideload_failed', __( 'Invalid image URL' ) );
    }

    $file_array = array();
    $file_array['name'] = basename( $matches[0] );

    // Download file to temp location.
    $file_array['tmp_name'] = download_url( $file );

    // If error storing temporarily, return the error.
    if ( is_wp_error( $file_array['tmp_name'] ) ) {
        return $file_array['tmp_name'];
    }

    // Do the validation and storage stuff.
    $id = media_handle_sideload( $file_array, $post_id, $desc );

    // If error storing permanently, unlink.
    if ( is_wp_error( $id ) ) {
        @unlink( $file_array['tmp_name'] );
        return $id;
    }
    return set_post_thumbnail( $post_id, $id );

}
 

I'd like to improve Robs answer by utilizing the WP core functions download_url and media_handle_sideload

<?php
/**
* Downloads an image from the specified URL and attaches it to a post as a post thumbnail.
*
* @param string $file    The URL of the image to download.
* @param int    $post_id The post ID the post thumbnail is to be associated with.
* @param string $desc    Optional. Description of the image.
* @return string|WP_Error Attachment ID, WP_Error object otherwise.
*/
function Generate_Featured_Image( $file, $post_id, $desc ){
    // Set variables for storage, fix file filename for query strings.
    preg_match( '/[^\?]+\.(jpe?g|jpe|gif|png)\b/i', $file, $matches );
    if ( ! $matches ) {
         return new WP_Error( 'image_sideload_failed', __( 'Invalid image URL' ) );
    }

    $file_array = array();
    $file_array['name'] = basename( $matches[0] );

    // Download file to temp location.
    $file_array['tmp_name'] = download_url( $file );

    // If error storing temporarily, return the error.
    if ( is_wp_error( $file_array['tmp_name'] ) ) {
        return $file_array['tmp_name'];
    }

    // Do the validation and storage stuff.
    $id = media_handle_sideload( $file_array, $post_id, $desc );

    // If error storing permanently, unlink.
    if ( is_wp_error( $id ) ) {
        @unlink( $file_array['tmp_name'] );
        return $id;
    }
    return set_post_thumbnail( $post_id, $id );

}

Versuchen Sie, set_post_thumbnail() zu verwenden.

Bearbeiten von Otto: Sie haben Ihre Fragegeklärt,also werdeich die Antwort klären,die Chipgegeben hat.

Grundsätzlichmüssen Sie auch den 'Anhang'für den Beitragerstellen. Wennein Bildin die WordPress-Medienbibliothek hochgeladen wird,wirdein spezieller Post-Eintragmit einem Post-Anhangerstellt. Dieser Anhangist über die Kennungpost_parentmit einembestimmten Beitrag verknüpft.

Wenn Sie also die ID des Anhangs kennen,setzen Siebeim Aufrufen von set_post_thumbnailmit dem Post-Objekt oder der ID und der Anhang-IDeinfach das Post-Thumbnail-Flag.

Wenn Sie den Anhangnochnichterstellt haben,müssen Sie dies zuersttun. Ameinfachstengeht dasmit wp_insert_attachment() . Diese Funktion verwendetein Arrayeiniger Parameter,den Dateinamen (die Dateimuss sichbereitsim richtigen Upload-Verzeichnisbefinden) und die Beitrags-ID des übergeordneten Beitrags,an den Sie den Anhang anhängenmöchten.

Nureine Datei hochzuladen und aneinen Beitrag anzuhängen,führtnicht automatisch zuetwas. Diesisteinfacheine Art Kategorisierungsmechanismus. Der Galeriemechanismus verwendetbeispielsweise die angehängten Bildereines Beitrags,um die [Galerie]für diesen Beitrag zuerstellen. Eine Miniaturansichtfüreinen Beitragistnureines der angehängten Bilder,die als Miniaturansichtfestgelegt wurden.

Weitere Informationen zur Verwendung von wp_insert_attachmentfinden Sieim Codex (oben verlinkt).

Try using set_post_thumbnail().

Edit by Otto: You clarified your question, so I'll clarify the response Chip gave.

Basically, you need to make the 'attachment' for the post as well. When an image is uploaded into the WordPress media library, a special post entry is made for it with a post type of attachment. This attachment is linked to some specific post via the post_parent identifier.

So if you know the ID of the attachment, then calling set_post_thumbnail with the post object or ID and the attachment ID will simply set the post thumbnail flag.

If you have not created the attachment yet, then you will need to do that first. Easiest way to do that is with wp_insert_attachment(). This function takes an array of a few parameters, the filename (the file must already be in the proper uploads directory), and the post ID of the parent post that you want to attach the attachment to.

Just having a file uploaded and attached to a post doesn't do anything automatically. This is simply a sort of categorization mechanism. The gallery mechanism, for example, uses the attached images of a post to build the [gallery] for that post. A thumbnail for a post is just one of the attached images which has be set to be the thumbnail.

More info on how to use wp_insert_attachment can be found in the codex (linked above).

set_post_thumbnail() ist diebeste Funktionfür diese Anforderung.

Ich denke,Siefinden die IDeines Anhangs über get_children() oder get_posts() . Das Ergebnis hatein Array undinnerhalb dieses Arraysbefindet sich die ID. Dasfolgende Beispiel zum Testen;ich hoffees klappt; Schreiben Sie ohne Tests,nur von Grund aufneu.

Für Ihre Anforderungistes wichtig,dass Sie get_the_ID()mit Ihrer post-ID ändern. Geben Sie die ID des Anhangs zurück,und verwenden Sie dazufoth set_post_thumbnail().

 $attachments = get_children( 
    array(
        'post_parent' => get_the_ID(), 
        'post_type' => 'attachment', 
        'post_mime_type' => 'image'
    )
);
foreach ( $attachments as $attachment_id => $attachment ) {
    echo wp_get_attachment_image($attachment_id);
}
 

set_post_thumbnail() is the best function for this requirement.

I think, you find the ID of an attachment via get_children() or get_posts(). The result have an array and inside this array is the ID. The follow example for testing; i hope it works; write without tests, only on scratch.

For your requirement it is important, that you change get_the_ID() with your post-ID; return the ID of the Attachment and this can you use foth set_post_thumbnail().

$attachments = get_children( 
    array(
        'post_parent' => get_the_ID(), 
        'post_type' => 'attachment', 
        'post_mime_type' => 'image'
    )
);
foreach ( $attachments as $attachment_id => $attachment ) {
    echo wp_get_attachment_image($attachment_id);
}

Habe dasgeradegefunden undes vieleinfachergemacht,funktioniert,aberichbin kein Sicherheits-Scrubber

 if(!empty($_FILES)){
    require_once( ABSPATH . 'wp-admin/includes/post.php' );
    require_once( ABSPATH . 'wp-admin/includes/image.php' );
    require_once( ABSPATH . 'wp-admin/includes/file.php' );
    require_once( ABSPATH . 'wp-admin/includes/media.php' );

    $post_ID = "your post id!";

    $attachment_id = media_handle_upload( 'file', $post_ID );
    set_post_thumbnail( $post_ID, $attachment_id );
}
 

einfach oder was?Nachdem Sie die richtigen Dateienerhalten haben,verarbeitet WordPress das Medium und lädtes hoch. Anschließend wirdes als Miniaturbildfestgelegt.

Just found this and made it much simpler, works but I'm no security scrubber

if(!empty($_FILES)){
    require_once( ABSPATH . 'wp-admin/includes/post.php' );
    require_once( ABSPATH . 'wp-admin/includes/image.php' );
    require_once( ABSPATH . 'wp-admin/includes/file.php' );
    require_once( ABSPATH . 'wp-admin/includes/media.php' );

    $post_ID = "your post id!";

    $attachment_id = media_handle_upload( 'file', $post_ID );
    set_post_thumbnail( $post_ID, $attachment_id );
}

simple or what? after getting the right files, wordpress will handle the media and upload it, then set it as a thumbnail.