ACF Check if Value is set

acf-check-array-value.php

// ACF Fields, we want to check if the values being returned are arrays
// We allow this multiple choice field to be blank in the admin, so the $value can return null, which is not an array.
// If we don't check if $value is not there, we get an error with the implode() function

$section_top_bottom_padding_array = get_sub_field_object('section_top_bottom_padding');
	$value = $section_top_bottom_padding_array['value'];
	if (is_array($value)) {
		$section_top_bottom_padding_array_output = implode(" ", $value);
	} else { // need to declare null if the array is empty
		$section_top_bottom_padding_array_output = null;
	}