我如何使用将根据用户而变化的参数查询函数中的计数？

Question

public function totalmember($designation){
    $stmt = $this->pdo->prepare("SELECT COUNT(*) AS totalmember FROM users 
    WHERE designation = :designation");
    $stmt->bindParam(':designation', $designation, PDO::PARAM_INT);
    $stmt->execute();
    $count = $stmt->fetch(PDO::FETCH_OBJ);
    echo $count->totalmember;
}

what i want is when people are logged in their respective account i want people to know how many people from their respective designation(teacher,clerk,peon ) have account?

Answer 1

Try the fetchAll() function instead of fetch() . Here is the reference link. https://www.php.net/manual/en/pdostatement.fetchall.php

Answer 2

Does that work?

$stmt = $this->pdo->prepare("SELECT * FROM users WHERE designation = :designation");
$stmt->bindParam(':designation', $designation, PDO::PARAM_INT);
$result = $stmt->execute();
$count = $result->rowCount();
echo $count;

$stmt = $this->pdo->prepare("SELECT COUNT(`id`) FROM users WHERE designation = :designation");
$stmt->bindParam(':designation', $designation, PDO::PARAM_INT);
$stmt->execute();
$count = $stmt->fetchColumn();
echo $count;