ac-column-separator.php

<?php
/**
 * The filter `ac/column/separator` allows you to alter the separator value of a column cell
 * You probably want to check for a specific column instance and check for extra conditionals related to the column in order to change the value for the correct column
 */

/**
 * @param string $separator The column separator value
 * @param AC\Column $column Column object
 *
 * @return string
 */
function ac_column_separator( $separator, AC\Column $column ) {

	// Change the rendered column separator value
	// $separator = ',';

	return $separator;
}

add_filter( 'ac/column/separator', 'ac_column_separator', 10, 3 );

// Changes the separator value from a comma (,) to a newline (<br>) for an ACF relationship column
add_filter( 'ac/column/separator', function ( $separator, $column ) {
	if ( $column instanceof \ACA\ACF\Column && $column->get_field() instanceof \ACA\ACF\Field\Type\Relationship ) {
		$separator = "<br>";
	}

	return $separator;
}, 10, 2 );