Count number of users for the comma separated values - php

Question

I have comma-separated field base_users in my database. How do I query to count the totaluser of that group? I have no problem to calculate the totaluser if the data is not in comma-separated field.
SELECT COUNT(base_u_id) AS totaluser
FROM base_users
WHERE 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 the sample database above, my expected result will 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 is what I have tried so far:
<?php
$getUser = base_executeSQL("SELECT * FROM base_users");
while($row_getUser = base_fetch_array($getUser))
{
$explodeData = explode(", ",$row_getUser['base_u_group']);
foreach($explodeData as $data)
{
$getUserGroupSQL = base_executeSQL("SELECT COUNT(base_u_id) AS totaluser FROM base_users as user, base_groups as gp WHERE gp.base_gp_id ='".$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;
}
}
?>

Answer 1

Use below logic: Just 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 as $gr) {
$split = explode(',', $gr);
if (!empty($split)) {
foreach($split as $val) {
if ($val) {
$group[$val] = $group[$val] + 1;
}
}
}
}
var_dump($group);

Answer 2

Try this:
SELECT COUNT(u.base_u_id), g.base_gp_name FROM base_users u
INNER JOIN base_groups g ON IF(POSITION(',' IN u.base_u_group) > 0, u.base_u_group LIKE ('".$row['base_gp_id'].",%') OR u.base_u_group LIKE ('%, ".$row['base_gp_id'].",%') OR u.base_u_group LIKE ('%, ".$row['base_gp_id']."'), u.base_u_group = '".$row['base_gp_id']."')
WHERE g.base_gp_id = ".$row['base_gp_id']."