WordPress Multi Level Parse Args

wp-multi-level-parse-args.php

<?php

/**
 * wp_parse_args() with support for multi-level arrays.
 *
 * @param  array $a Arrays to be parsed
 * @param  array $b Defaults for the arrays.
 * @return array
 */
function multi_level_wp_parse_args( &$a, $b ) {
	// https://mekshq.com/recursive-wp-parse-args-wordpress-function/
	// Similar to wp_parse_args() just a bit extended to work with multidimensional arrays :)
	$a = (array) $a;
	$b = (array) $b;
	$result = $b;
	foreach ( $a as $k => &$v ) {
		if ( is_array( $v ) && isset( $result[ $k ] ) ) {
			$result[ $k ] = multi_level_wp_parse_args( $v, $result[ $k ] );
		} else {
			$result[ $k ] = $v;
		}
	}
	return $result;
}