Dynamically add options

• bmarshall511

• December 14, 2017 at 4:54 am

I’ve looked at the documentation to create dynamic fields here: https://www.advancedcustomfields.com/resources/dynamically-populate-a-select-fields-choices/

Been playing around with it for awhile, but with no luck. Here’s what Im trying to do:

1. I have a Repeater field named ‘slides’
2. Within that repeater field, I gave a Group sub field named ‘templates’
3. Within that sub field, I have a Group sub field named ‘default’
4. Lastly, within the default sub field, I have a Radio field named ‘image_size’

What I’m trying to is dynamically add the available WP image sizes in that field. I need help on customizing the default sub field options.

Hope that all makes sense

• Thomas

• December 15, 2017 at 9:31 am

It doesn’t matter in which level of the repeaters the field is placed.

Try this code to get the image sizes as options for your radio field:

<?php
function acf_load_image_sizes_field_choices( $field ) {
	global $_wp_additional_image_sizes;

	$field['choices'] = array();

	foreach ( get_intermediate_image_sizes() as $size ) {
		if ( in_array( $size, array('thumbnail', 'medium', 'medium_large', 'large') ) ) {

			$width  = get_option( "{$size}_size_w" );
			$height = get_option( "{$size}_size_h" );
			$crop = (bool) get_option( "{$size}_crop" );

		} elseif ( isset( $_wp_additional_image_sizes[ $size ] ) ) {

			$width = $_wp_additional_image_sizes[ $size ]['width'];
			$height = $_wp_additional_image_sizes[ $size ]['height'];
			$crop = $_wp_additional_image_sizes[ $size ]['crop'];

		}
		
		$image_crop = "";
		if ( $crop == 1 ) {
			$image_crop = " - cropped";
		}

		// set the value for field values and labels as you like
		$value = $size;
		$label = $size . " ({$width}x{$height}{$image_crop})";

		$field['choices'][ $value ] = $label;
	}

	// add full size option
	$field['choices'][ 'full' ] = "Full size";

	return $field;
}
add_filter('acf/load_field/name=image_size', 'acf_load_image_sizes_field_choices');
?>

This filter works for the field named image-size.

I hope you get the idea how this works and you can adjust it to your needs.

Regards
Thomas

• bmarshall511

• December 21, 2017 at 6:09 am

Works great! Thanks a lot!