Ch: 003 Error handling - heikijapan/php-book2 GitHub Wiki

There are several ways of error handling in PHP. TRY & CATCH block is the most used one.

• It can cover large code blocks and be even wrapped or span over IF blocks.
• Instead of one big block, it would be better to have smaller blocks in that way it will be easier to define the cause of an error.
• It is smart to have one try & catch protect PDO connection block and then one individual try & catch for every CRUD operation.
• To define your own error blocks and messages Throwable is used.

try {
$pdo = new PDO('mysql info etc');
$stmt = $pdo->prepare('SELECT * FROM `my_database_table` WHERE `id` < 5 ASC');
$stmt->execute()

} catch (PDOException $e) {

// This logs errors into server log file, DIR can be found using phpinfo()
// If you want to use your own log file, then use log_errors();
error_log($e->getMessage());

$msg = 'Something went wrong! Cannot connect to MySQL database`;

}