php array_intersect making issues and i'm not able to check the empty array

Question

I have five arrays and a search for which user can do search randomly. So for among those five sometimes there may be value for two arrays, three arrays or five arrays and whatever.

So When I intersect I am not be able to check which are empty so that it always returns an empty array.

$full_ids = array_intersect($g_arr, $c_arr, $k_arr, $m_arr, $p_arr);

Actually I need to check and make this dynamic like if there are values for $g_arr, $c_arrthen the above operation will be applied with these two.. like

$full_ids = array_intersect($g_arr, $c_arr);

I don't understand how to check that? Any help w'd be appreciated..thanks

Probably you have to use array_diff, not array_intersect — hindmost
– hindmost, Commented Mar 17, 2014 at 8:16
Create a new, empty array; Test each array in turn, if it contains values then push to your new array; then use call_user_func_array() to call array_intersect() with your new array as the argument — Mark Baker
– Mark Baker, Commented Mar 17, 2014 at 8:20
It's hard to understand what you want. Could you provide example of source arrays and desired result? — hindmost
– hindmost, Commented Mar 17, 2014 at 8:20

Mark Baker · Accepted Answer · 2014-03-17 08:28:48Z

1

$tempArray = [];
if (count($g_arr) >0) $tempArray[] = $g_arr;
if (count($c_arr) >0) $tempArray[] = $c_arr;
if (count($k_arr) >0) $tempArray[] = $k_arr;
if (count($m_arr) >0) $tempArray[] = $m_arr;
if (count($p_arr) >0) $tempArray[] = $p_arr;

$intersect = call_user_func_array('array_intersect', $tempArray);

answered Mar 17, 2014 at 8:28

Mark Baker

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