Get Image Src (URL) from Text Field and Set Featured Image

• Mrskt

• September 22, 2021 at 12:31 pm

Hi,

Is it possible to get image source from ACF text field and set it to featured image by using post_thumbnail_html.

My Custom Field id is: `app_img_link’

• John Huebner

• September 22, 2021 at 4:17 pm

The featured image for a post is stored as a post ID (attachment ID), this means that it is an image in the media library and this is required. In order to do this you would need to download and insert the image into media. see media_sideload_image()

• Mrskt

• September 23, 2021 at 12:55 am

@hube2 No, It you can make external src image url to featured image by post_thumbnail_html.

But i don’t know how can i do it with ACF custom fields value.

Here is the few links:
https://wordpress.stackexchange.com/a/158568/210558

https://wordpress.stackexchange.com/a/342159/210558

If you know how can i get image src url value from custom fields and set it to featured image then plz tell me?

• jarvis

• September 23, 2021 at 5:00 am

I’ve done something similar with Gravity forms, whereby someone would submit content and I needed to use the added image field to set the featured image on the new post.

The code used this:

$upload_path = rgar($entry, '11');
			if (!empty($upload_path)){
				$attachmentid	= wp_create_image_id($upload_path, $member_post_id);
				$setfeatimg		= set_post_thumbnail($member_post_id, $attachmentid);
			}	

Obviously, you would need to alter from a gravity form field to your.
$member_post_id was the post ID I needed to add the image to

function wp_create_image_id( $image_url, $parent_post_id = null ) {
	// Bail if the image url isn't valid
	if( empty( $image_url ) || ! esc_url( $image_url ) )
		return false;
	// Escape the url, just to be save
	$image_url = esc_url( $image_url );
	// Cache info on the wp uploads dir
	$wp_upload_dir = wp_upload_dir();
	// get the file path
	$path = parse_url( $image_url, PHP_URL_PATH );
	// File base name, e.g. image.jpg
	$file_base_name = basename( $image_url );
	// Full path, set up to work with a WP in a subdirectory or default location
	if( site_url() != home_url() ) {
		$home_path = dirname( dirname( dirname( dirname( dirname( __FILE__ ) ) ) ) );
	} else {
		$home_path = dirname( dirname( dirname( dirname( __FILE__ ) ) ) );
	}
	// Remove the trailing slash on the home path
	$home_path = untrailingslashit( $home_path );
	// Combine the two to get the uploaded file path
	$uploaded_file_path = $home_path . $path;
	// Check the type of file. We'll use this as the 'post_mime_type'.
	$filetype = wp_check_filetype( $file_base_name, null );
	// error check
	if( !empty( $filetype ) && is_array( $filetype ) ) {
		// Create attachment title - basically, pull out the text
		$post_title = preg_replace( '/\.[^.]+$/', '', $file_base_name );
		// Prepare an array of post data for the attachment.
		$attachment = array(
			'guid'           => $wp_upload_dir['url'] . '/' . basename( $uploaded_file_path ), 
			'post_mime_type' => $filetype['type'],
			'post_title'     => esc_attr( $post_title ),
			'post_content'   => '',
			'post_status'    => 'inherit'
		);
		// Set the post parent id if there is one
		if( ! is_null( $parent_post_id ) && absint( $parent_post_id ) )
			$attachment['post_parent'] = absint( $parent_post_id );
		// Insert the attachment.
		$attach_id = wp_insert_attachment( $attachment, $uploaded_file_path );
		//Error check
		if( !is_wp_error( $attach_id ) ) {
			//Generate wp attachment meta data
			if( file_exists( ABSPATH . 'wp-admin/includes/image.php') && file_exists( ABSPATH . 'wp-admin/includes/media.php') ) {
				require_once( ABSPATH . 'wp-admin/includes/image.php' );
				require_once( ABSPATH . 'wp-admin/includes/media.php' );
				$attach_data = wp_generate_attachment_metadata( $attach_id, $uploaded_file_path );
				wp_update_attachment_metadata( $attach_id, $attach_data );
			} // end if file exists check
		} // end if error check
		return $attach_id; 
	} else {
		return false;
	} // end if $filetype
} // end function prg_create_image_id

If you need to get the image path, please read this forum post

• John Huebner

• September 23, 2021 at 8:50 am

@mrskt what you are talking about is using the post_thumbnail_html hook to add a filter that alters the html that is returned by the function get_the_post_thumbnail(). This is not what you asked, you said you wanted to set the featured image for the post from a URL. While they are similar and may appear to have the same result, they are two different things.

• Mrskt

• September 23, 2021 at 9:09 am

@hube2 I already mentioned “Text Field” it means i will add image url in that field as a value and that can be both External or Internal (Media Library) Src.

So did you find any solution for that?