Hoe do I Loop through multi-diminsional array??

[Lynux]

I am needing to loop throgh a mulit-dininsional array
(example: $norm_table_info[0][1])
Ho wo I loop through both key value pairs?

((example here is what I would typically do for a one diminsional array))
----------->
reset($norm_table_info);
while (list($k, $v) = each($norm_table_info)){
echo $k .&quot; - &quot; .$v .&quot;<br>&quot;;
}
============================================

Thanks in advance!!! =================================
Imagination is more important than knowledge.
(A.E.)

 

[rycamor]

If you know how deep your multidimensional array is, you could just nest your while statements, or better yet, nest your foreach statements. Here is an example with a two-dimensional array:

reset($norm_table_info);

foreach ($norm_table_info as $k => $v){
   if(is_array($k){
      foreach ($k as $nk => $nv){
         echo $nk . &quot; - &quot; . $nv . &quot;<br>&quot;;
      }
   }
   else{
      echo  $k .&quot; - &quot; .$v .&quot;<br>&quot;;
   }
}

However, PHP has provided a really cool function that packages this behavior, and allows you to perform a certain function on every node of an array. It's called array_walk(). ( see

http://php.net/array_walk

) With a little creativity, we can make this function call itself recursively until it has visited every node on a many-dimensional array. Here is an example:

// Part A: first we define the function that will be applied to every element
// this function recursively calls itself, until it visits every node on the tree

function test_print ($item, $key) {
    if(is_array($item)){
    array_walk($item, 'test_print');
    }
    else
    {
      if($key)
      {
        echo "$key - $item, ";
      }
    }

    if(is_array($item)){
      echo '<br>';
    }
} // end function 'test_print'

// Part B: now we run that function through the array:
// this will visit each node of the tree, and output the row

array_walk($my_array, 'test_print');

Also, I have placed a code snippet at SourceForge, showing how to turn SQL queries into multidimensional arrays, and then process them in this way:

http://sourceforge.net/snippet/detail.php?type=snippet&id=100993

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