The script below works fine with Php php-3.0.11 but with 4.0b1 i simply get..

Letter <br>
Letter <br>
Letter <br>

as the output

<?
$letters = array("a","b","c");

                      function thingymajig( $thingy ) {
                         echo "Letter $thingy<br>\n";
                      }

                      array_walk( $letters, 'thingymajig' );
?>

Php was configured using..
./configure --with-mysql --with-apache=../apache_1.3.6 --with-gd=/usr/local --enable-track-var