Multidimensinal array is the array of arrays. You can store multidimensional array as follows:

$arr=array(
array(1,"demo1","demo2"),
array(1,"demo3","demo4"),
array(1,"demo5","demo6"),
array(1,"demo7","demo8")
);

To traverse a multidimensional array in PHP you can use the following script:

<?php
function get_array_elems($arrResult, $where="array"){ 
           while(list($key,$value)=each($arrResult)){ 
                 if (is_array($value)){ 
                    get_array_elems($value, $where."[$key]"); 
                 } 
                 else { 
                       for ($i=0; $i\n"; 
                       } 
                 } 
           } 
  } 
  $arr=array(
array(1,"demo1","demo2"),
array(2,"demo3","demo4"),
array(3,"demo5","demo6"),
array(4,"demo7","demo8")
);
get_array_elems($arr); 
?>