array_sanitize_wp.php

<?php

function ninjaSanitizeTextOrArray( $array_or_string ) {
		if ( is_string( $array_or_string ) ) {
			$array_or_string = sanitize_text_field( $array_or_string );
		} elseif ( is_array( $array_or_string ) ) {
			foreach ( $array_or_string as $key => &$value ) {
				if ( is_array( $value ) ) {
					$value = ninjaSanitizeTextOrArray( $value );
				} else {
					$value = ninjaSanitizeTextOrArray( $value );
				}
			}
		}
		return $array_or_string;
}