assign same quantity of work by each worker available php - php

Question

I want to assign same quantity of work by each worker available in php.
This is my array of available worker:
if (!isset($array_worker)){
$array_worker = array();
}
$stmt = $dbh->prepare("SELECT username
FROM group_members
WHERE grp_id = :grp_id
AND statut > 0
AND specification != 2");
$stmt->bindValue(':grp_id', $grp_id);
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $key => $value){
if (!in_array($value['username'], $array_worker)){
array_push($array_worker, $value['username']);
}
}
This array_worker return 2 entries
That is what I have try
$n = 0;
for ($i = 0; $i < count_worknotdone($grp_id); $i++) {
if ($n >= count($array_worker)){
$n = 0;
}
$stmt = $dbh->prepare("UPDATE work
SET worker = :worker
WHERE grp_id = :grp_id
AND worker IS NULL");
$stmt->bindValue(':worker ', $array_worker[$n]);
$stmt->bindValue(':grp_id', $grp_id);
$stmt->execute();
$n++;
}
but that assign only the first worker for each work..
What I want for example if we have 2 workers available and 4 work not done
We assign 2 work for each workers.
Thanks you

Answer 1

if (!isset($array_worker)){
$array_worker = array();
}
if (!isset($array_id)){
$array_id = array();
}
$stmt = $dbh->prepare("SELECT username FROM group_members WHERE grp_id = :grp_id AND statut > 0 AND specification != 2");
$stmt->bindValue(':grp_id', $grp_id);
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $key => $value){
if (!in_array($value['username'], $array_worker)){
array_push($array_worker, $value['username']);
}
}
$stmt = $dbh->prepare("SELECT id FROM work WHERE grp_id = :grp_id AND statut < 1 AND worker IS NULL");
$stmt->bindValue(':grp_id', $grp_id);
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $key => $value){
if (!in_array($value['id'], $array_id)){
array_push($array_id, $value['id']);
}
}
$n = 0;
for ($i = 0; $i < count($array_id); $i++) {
if ($n >= count($array_worker)){
$n = 0;
}
$stmt = $dbh->prepare("UPDATE work SET worker = :worker WHERE id = :id AND grp_id = :grp_id AND worker IS NULL");
$stmt->bindValue(':id', $array_id[$i]);
$stmt->bindValue(':worker', $array_worker[$n]);
$stmt->bindValue(':grp_id', $grp_id);
$stmt->execute();
$n++;
}
I have done what I want by doing that, that for sure can be improve but its working..