PHP Mysql PDO query from foreach multiple values stored for output -


today i've been searching on how store different values query injected 4 times different categories. result wanted got values when return them last query result. i'm wondering outcome problem

public function setmaxid() {         $categorys = $this->getcategorys();         foreach ($categorys $category) {             $sth = $this->conn->prepare("select max(data_id) bcc_data data_category =  '" . $category['bcc_data_category_name'] . "'");             $sth->execute();             $id = $sth->fetchall();                      $maxid = $id[0]['max(data_id)'];             var_dump($maxid);         }     }

var_dump: 

string '22' (length=2)  string '35' (length=2)  string '34' (length=2)  string '29' (length=2)

it looks overwriting max id each time in loop, if want return them this:

$maxids = []; foreach ($categorys $category) {     $sth = $this->conn->prepare("select max(data_id) bcc_data data_category =  '" . $category['bcc_data_category_name'] . "'");     $sth->execute();     $id = $sth->fetchall();              $maxids[] = $id[0]['max(data_id)']; } return $maxids; //or return max($maxids) if want single max

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