php - Count number of users for the comma separated values -


i have comma-separated field base_users in database. how query count totaluser of group? have no problem calculate totaluser if data not in comma-separated field.

select count(base_u_id) totaluser  base_users  base_u_group =".$row['base_gp_id']." 
 1)base_users |base_u_id |  base_u_name  | base_u_group | ------------------------------------------ |    1     |   username1   |   1, 2, 4    | |    2     |   username2   |   3          | |    3     |   username3   |   3, 4       | |    4     |   username4   |   1, 4       |  2)base_groups                            | base_gp_id | base_gp_name  |  ------------------------------ |    1       |    group1     | |    2       |    group2     |    |    3       |    group3     |  |    4       |    group4     | |    5       |    group5     |

from sample database above, expected result be: 

total user of group1 = 2 total user of group2 = 1 total user of group3 = 2 total user of group4 = 3 total user of group5 = 0

this have tried far:

<?php $getuser = base_executesql("select * base_users");  while($row_getuser = base_fetch_array($getuser)) {     $explodedata = explode(", ",$row_getuser['base_u_group']);     foreach($explodedata $data)     {         $getusergroupsql = base_executesql("select count(base_u_id) totaluser base_users user, base_groups gp gp.base_gp_id ='".$data."' ");          while($usergroupprofile_row = base_fetch_array($getusergroupsql))         if (base_num_rows($getusergroupsql)!= 0)             $totaluser = $usergroupprofile_row["totaluser"];         elseif (base_num_rows($getusergroupsql)== 0)             $totaluser = 0;     } } ?>

use below logic: hint

$group = array(1=>0,2=>0,3=>0,4=>0,5=>0); $base_u_group = array('1,2,4','3','3,4','1,4'); foreach($base_u_group $gr) {        $split = explode(',', $gr);        if (!empty($split)) {           foreach($split $val) {             if ($val) {               $group[$val] =  $group[$val] + 1;             }           }        } } var_dump($group);

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