Why do I get error SQLSTATE42000 in PHP/MySQL - php

Question

I am working on a project using PHP and MySQL.
I have an HTML table that has 3 columns into which I load data from my "Tasks" table in MySQL. The columns are: id, taskname and a button column that when clicked on, takes you to the Edit page for the relevant task (I pass the task id as a URL) - http://localhost/tasks/?edit&id=3
The problem arises when I try to load the details about this task. This is the code:
if(isset($_GET["id"]))
{
try
{
$sql = "SELECT * FROM tasks WHERE id = :id";
$result = $pdo->prepare($sql);
$result->bindValue(":id", $_GET["id"]);
$result = $pdo->query($sql);
}
catch(PDOException $e)
{
$error = "Error trying to load task - " . $e->getMessage();
include "error.php";
exit();
}
foreach($result as $task)
{
$tasktext = $task["task"];
$id = $task["id"];
}
$title = "Edit task";
$action = "edittask";
$button = "Edit task";
include 'form.php';
exit();
resetParameters();
I get the following error:
Error trying to load task - SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':id' at line 1
When I replace the WHERE id = :id with WHERE id = 3 for example it works and loads the details about the task however I simply cannot get it to load the details about the task I have clicked on in the previous screen.
Could anyone spot anything wrong with my code/logic and point me in the right direction please?

Answer 1

You need to use execute() not query() when using prepared query's:
execute() PDOStatement::execute — Executes a prepared statement.
query() PDO::query — Executes an SQL statement.
Try:
<?php
try
{
$sql = "SELECT * FROM tasks WHERE id = :id";
$query = $pdo->prepare($sql);
$query->bindValue(":id", $_GET["id"]);
$query->execute();
$result = $query->fetchAll(PDO::FETCH_ASSOC);
}
catch(PDOException $e)
{
$error = "Error trying to load task - " . $e->getMessage();
include "error.php";
exit();
}
?>