Merge tag filter to enable display of selected image choice in email notifications

image-choices-radio-button-merge-tag.php

<?php
/*
If you use the merge tag {all_fields} this will always display the image
Or if you use individual field merge tags, eg {Options:1} you can display the image by adding a modifier, eg {Options:1:image}
You can also specify the size that the image should display at by adding a pixel size in the following format, eg {Options:1:image_50px}
By default your image will display at its natural size
*/
add_filter( 'gform_merge_tag_filter', 'image_choices_merge_tag_image', 11, 5 );
function image_choices_merge_tag_image( $value, $merge_tag, $modifier, $field, $raw_value ) {
	
	if ( ($merge_tag != 'all_fields' && substr($modifier, 0, 5) != 'image') ) {
		return $value;
	}

	if ( !is_object( $field ) || !property_exists($field, 'imageChoices_enableImages') || empty($field->imageChoices_enableImages)) {
		return $value;
	}

	if ($field->type == 'radio') {

		$text = RGFormsModel::get_choice_text($field, $value);
		$image = '';
		foreach($field->choices as $choice) {
			if ($choice['value'] != $value) {
				continue;
			}
			if (!empty($choice['imageChoices_image'])) {
				$image = $choice['imageChoices_image'];
			}
		}
		if (!empty($image)) {
			$size = '';
			if (strlen($modifier) > 5 && substr($modifier, 0, 6) == 'image_') {
				$size = 'style="width:'.substr($modifier, 6).'; height:auto; max-width:100%;"';
			}
			$value = '<img src="'.$image.'" alt="'.$text.'" '.$size.' />';
		}

	}

    return $value;

}