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Custom Image Size with Image Field

  • I’ve been searching and trying code for hours and hours, I just can’t get this to work properly, hoping someone can help me understand the Image Field better?

    I need to use either the default Thumbnail size or a custom size image for use with the Image field (since you can’t select an image size, from what I can see.) For this example, I’m trying to use a custom image size. I am using an Image Field set to return the Image URL.

    Here is my code in the functions.php file, for a custom image size:

    if ( function_exists( 'add_image_size' ) ) {
    	add_image_size( 'homepage-thumb', 97, 83, true );
    add_filter( 'image_size_names_choose', 'my_custom_sizes' );
    function my_custom_sizes( $sizes ) {
        return array_merge( $sizes, array(
            'homepage-thumb' => __('Homepage Thumbnail'),
        ) );

    This is my code in the template:

    <?php if ( get_post_meta($post->ID, 'button_one_link', true) ) : ?>
    	$attachment_id = get_field('button_one_image');
    	$size = "thumbnail";
    	$image = wp_get_attachment_image_src( $attachment_id, $size );
    // url = $image[0];
    <li><a href="<?php the_field('button_one_link'); ?>"><img src="<?php echo $image[0]; ?>"><?php the_field('button_one_text'); ?></a></li>
    <?php endif; ?>

    The frontend doesn’t show anything, no image at all.

    I’m not sure what I’m doing wrong 🙁


  • OH!! I found it.. Now I feel really stupid.

    I just had to change the Return Value on the image field to “Image ID” instead of using URL.

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