I don't see the syntax error. Line 8 has the asterisks. I checked all the open and closing brackets. Thanks,
function multimax($array){
foreach ( $array as $value){
if (is_array($value)){
$value = multimax($value) ;
}
if (!(isset($max))) {
$max = $value ; *****
}else {
$max = ($value > $max ? $value : $max );
}
}// end foreach
$return $max;
}//end function
$arr= array(array(141,151,161),2,3,array(101,202,array(303,404)));
$max =multimax($arr);
var_dump($max);