How Can I Retrieve and Handle Query Preparation Errors Using PDO prepare() in PHP?

Retrieving Query Errors from prepare() in PDO PHP

When working with PDO PHP, you may encounter situations where you need to handle errors that occur during query preparation. The following code snippet attempts to prepare a query using the prepare() method, but you may require additional information about the error if it fails:

$st = $db->prepare("SELECT * FROM c6ode");

To retrieve the intended MySQL error for the query, you необходимо follow specific steps:

1. Set the Error Mode:
   Configure the PDO error reporting mode to PDO::ERRMODE_EXCEPTION using the setAttribute() method. This step enables the PDO object to throw exceptions when errors occur.
2. Disable Emulated Preparation (Optional):
   By default, PDO emulates prepared statement preparation. To ensure that the MySQL server actually receives the statement for validation, disable this feature by setting PDO::ATTR_EMULATE_PREPARES to false.

Here's an example code snippet that demonstrates these steps:

<?php $pdo = new PDO('mysql:host=localhost;dbname=test;charset=utf8', 'localonly', 'localonly');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$pdo->prepare('INSERT INTO DoesNotExist (x) VALUES (?)');
?>

The above code will result in an exception being thrown with the following message:

SQLSTATE[42S02]: Base table or view not found: 
1146 Table 'test.doesnotexist' doesn't exist

By following these steps, you can effectively retrieve and handle errors that occur during query preparation using the prepare() method in PDO PHP.

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