Below is my code, I am not able to resolve this error. Any help is appreciated. I am trying to update a table in my database.

    public function updateUnit($params){
    $user = 'monil';
    $password = 'Masters123';   
    $dbh = new \PDO('mysql:host=;dbname=tcsdb', $user, $password);

    $task=array(':UnitCode'=>$params['UnitCode'],':UnitDescription'=>$params['UnitDescription']    ,
      ':UnitName'=>$params['UnitName'], ':UnitID'=>$params['UnitID']);
    echo $params['UnitID'];

    $sth = $dbh->prepare('UPDATE unit SET UnitCode = :UnitCode,'
        . 'UnitDescription = :UnitDescription,UnitName = :UnitName WHERE UnitId=:UnitId');

    return true;

same errors may occur if you use a "." dot in bindParam


$query = "select * from t where t1 =";
$stmt = $pdo->prepare($query);
$stmt->execute(['' => 'blah']);
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The same error arise when you missed : colon while creating statement.

ex: Below statement throws invalid parameter error as password in VALUES is missing : colon.

$stmt = $db->prepare('INSERT INTO members (username,password) VALUES (:username, password)');
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Warm tip !!!

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