Why the PDO error Uncaught Error: Call to Undefined method PDO::fetch()?

Question

Why the PDO error Uncaught Error: Call to Undefined method PDO::fetch()?

Asked 7 years, 1 month ago

Viewed 3,219 times

2

I don’t know why I made a mistake.

Fatal error: Uncaught Error: Call to Undefined method PDO::fetch() in /opt/lampp/htdocs/myschool.com.br/login.php:24 Trace stack: #0 {main} thrown in /opt/lampp/htdocs/myschool.com.br/login.php on line 24

PHP

use dao\Connection;

session_start();
//Incluir a conexão com banco de dados
include 'application/dao/Connection.php';
date_default_timezone_set("Etc/GMT+3");

if(!empty($_POST)){
    $res='';
    $email = $_POST['email'];
    $senha = $_POST['password'];

    $sql = "SELECT idlog, logname 
            FROM login 
            WHERE logemail='$email' AND logpassword=md5('$senha')
                AND logBlocked = 'no' AND logstatus = 1;";
    $res = Connection::getInstance();
    $res->prepare($sql);
    $res->exec($sql);

    $dados = $res->fetch();


    if(empty($dados)){
        echo "<script>alert('Seu login falhou. LOGIN: [email protected] SENHA: 123');</script>";
    } else {
        $_SESSION['login'] = true;
        $_SESSION['id'] = $dados['id'];
        $_SESSION['name'] = $dados['name'];
        header("location: index.php");
    }
}

You didn’t pass fetch(PDO::FETCH_ASSOC);


– Rafael Augusto

2017/10/11 at 16:26
I think the problem is in prepare, fetch parameters are optional, store $res->prepare($sql); in a variable and instancie exec with it

– Felipe Duarte

2017/10/11 at 16:33
change exec for execute

– Don't Panic

2017/10/11 at 16:43
Rafael Augusto fetch(PDO::FETCH_ASSOC); it was the first thing I tried and it didn’t work.

– user65509

2017/10/11 at 16:44
Everton gave running - Uncaught Error: Call to Undefined method PDO::execute(). I think the error ta after exec ...

– user65509

2017/10/11 at 16:45
And Connection::getInstance returns a PDO instance?

– Don't Panic

2017/10/11 at 16:46
yes this ta working, it is an instance of Singleton. But this ta working, even because it took a great job to find out how it worked.

– user65509

2017/10/11 at 16:47
The error always occurs on line 24 which is the fetch line. This means that the research works and the connection with the bank also works, even because it had wrong the name of a field and there was a warning field name wrong. Then connect with the bank do the select but time to put inside a stick variable..

– user65509

2017/10/11 at 16:50
Felipe Duarte also did not work $variable = $res->prepare($sql); $data= $variable->fecth(); and the error in exec. I tried that now ->>> $res->prepare($sql); $stmt->exec($res); $data = $stmt->fetch(); gave the error Call to a Member Function exec() on array

– user65509

2017/10/11 at 17:22
Ah and I declared the variable data and stmt as array, I do not know if it is right but the command does not work if the variables are not declared, unknow variable.

– user65509

2017/10/11 at 17:30

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by rray • **66,288** points · Answer 1 · 2017-10-11T17:13:34+00:00

Code does not work because no Pdostatement is processed. prepare() returns one, so it is necessary to assign it to a variable. To send the query to is obligatory to call execute() and finally call the fetch()/fetchAll()

change:

$res->prepare($sql);
$res->exec($sql);

For:

$sql = "SELECT idlog, logname FROM login
        WHERE logemail= ? AND logpassword=md5(?)
        AND logBlocked = 'no' AND logstatus = 1;";

$stmt = $res->prepare($sql);
if(!$stmt->execute(array($email, $senha))){
   echo '<pre> erro: ';
   print_r($stmt->errorInfo());
   exit;
}
$dados = $stmt->fetch();