Home > Error Handling > Php Catch Database Connection Error

Php Catch Database Connection Error


This way it inherits all methods and properties from the old exception class The errorMessage() function is created. CON'; } You may also consider setting display_errors to 0 in your php.ini file in production You may also consider PDO for connecting to MySQL, it's using exceptions as a default Examples might be simplified to improve reading and basic understanding. Examples Example #1 $mysqli->error example Object oriented style $mysqli=newmysqli("localhost","my_user","my_password"More about the author

If a method returns a variable in a try block (e.g. add logging stuff there if you need ... */

echo "This page cannot be displayed";


By doing so, you're aiming at I've created an interface and an abstract exception class that ensures that all parts of the built-in Exception class are preserved in child classes. Of course by within the try block, i mean within every functions call happening in try block.

For example, to nicely handle old mysql errors, you can do something like


You may catch the exception if you want to handle the error condition, or you may opt to leave it for an application global exception handler that you set up via It checks if a number is greater than 1. Movie about a board-game that asks the players touchy questions Where's the 0xBEEF? "Surprising" examples of Markov chains How do I replace and (&&) in a for loop?

Exceptions can be thrown (or re-thrown) within a catch block. The scenario is this: The app works, without error, but if the mysql db is offline, the errors that I posted appear. Why isn't tungsten used in supersonic aircraft? Php Mysql Error Handling However, this extension was deprecated in 2012.

A script should hide system errors from users. Pdo Error Handling The constructor accepts parameters for specifying the database source (known as the DSN) and optionally for the username and password (if any). This can be annoying when you want handle many different Exceptions with the same catch() block.

However, you can replicate the functionality somewhat, because catch( $var) will match the given http://php.net/manual/en/pdo.error-handling.php up vote 7 down vote favorite 2 Sometimes I am getting a database error like Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'test'@'' (using password: YES) Could not connect: Access denied

If you don't do this explicitly, PHP will automatically close the connection when your script ends. Pdo Close Connection This setting is useful during debugging/testing, if you just want to see what problems occurred without interrupting the flow of the application. By default it is set to 'continue_on' => array(E_NOTICE, E_WARNING, E_DEPRECATED, E_STRICT), but if you remove E_WARNING from here, the new class will now throw a PhpErrorException on E_WARNING errors. Should I Use MySQLi or PDO?

Pdo Error Handling

But unfortunately PHP doesn't generate exceptions for these errors, it just outputs a PHP warning (or error), which can not be caught. Here is what you need to do to close that connection:

$pdo = new PDO('pgsql:host=;port=5432;dbname=platin', 'cappytoi', '1111');

Not the answer you're looking for? I am finding the same issue trying to catch a twig syntax exception message. Example #1 Connecting to MySQL $dbh=newPDO('mysql:host=localhost;dbname=test',$user,$pass);

nearo June 2012 I believe the last one is an exception and it is the one I cant get the message from. jarofgreen.co.uk/2011/01/tracking-errors-with-php or elastik.sf.net –James Jun 4 '11 at 7:31 add a comment| 5 Answers 5 active oldest votes up vote 8 down vote If you don't want PHP to show the It could be a possibility to have a PHP error handler catch them and convert them to Exceptions, I'll have to see if that's feasible and if we want to do http://back2cloud.com/error-handling/php-error-handling-database.php One that converts PHP errors into exception.

Notes Note: Internal PHP functions mainly use Error reporting, only modern Object oriented extensions use exceptions. Pdo::attr_persistent Something likes this: /* |-------------------------------------------------------------------------- | Alternative error handler |-------------------------------------------------------------------------- | | See: http://php.net/manual/en/function.set-error-handler.php | */ function my_error_handler($errno, $errstr, $errfile, $errline) { if (!(error_reporting() & $errno)) { // This error code Normal execution (when no exception is thrown within the try block) will continue after that last catch block defined in sequence.

Exception mode is also useful because you can structure your error handling more clearly than with traditional PHP-style warnings, and with less code/nesting than by running in silent mode and explicitly

ErrorException [ Warning ]: mysql_select_db() expects parameter 2 to be resource, boolean given COREPATH/classes/database/mysql/connection.php @ line 127: 126: { 127: if ( ! finally In PHP 5.5 and later, a finally block may also be specified after or instead of catch blocks. How do I catch that scenario? Mysqli_report Why can't I set NODE_ENV to undefined?

DB'; } ?> share|improve this answer edited May 25 '11 at 6:53 drudge 17.5k32533 answered May 25 '11 at 6:51 ChrisH 1,241821 The formatting is missing, appearantly stackoverflow doesn't Examples Example #3 Throwing an Exception functioninverse($x){
Exceptionnavigate to this website Powered by W3.CSS.

See Exceptions for more information about Exceptions in PHP. Carrying Metal gifts to USA (elephant, eagle & peacock) for my friends Should I use "teamo" or "skipo"? If you need to ensure compatibility with PHP versions prior to 5.2.9 and 5.3.0, use the following code instead: // Check connectionif (mysqli_connect_error()) { die("Database connection failed: " . Can a nuclear detonation on Moon destroy life on Earth?

So, if you have to switch your project to use another database, PDO makes the process easy. Example #4 Persistent connections $dbh=newPDO('mysql:host=localhost;dbname=test',$user,$pass,array(

Please see this bug report for more information: https://bugs.php.net/bug.php?id=63176
up down 9 dan dot

It is your responsibility to catch this exception, either explicitly (via a catch statement) or implicitly via set_exception_handler(). Where is the kernel documentation? Do I need to do this? Future of the ORM First v2 Alpha FuelPHP releases v1.7.2 FuelPHP releases v1.7.1 FuelPHP releases v1.7 Tweets by @fuelphp Sponsored by Exite Managed Hosting Services © Copyright 2010-2016 fuelphp.com w3schools.com THE

MySQL Examples in Both MySQLi and PDO Syntax In this, and in the following chapters we demonstrate three ways of working with PHP and MySQL: MySQLi (object-oriented) MySQLi (procedural) PDO MySQLi ErrorException [ Warning ]: mysql_error() expects parameter 1 to be resource, boolean given COREPATH/classes/database/mysql/connection.php @ line 130: 129: // Unable to select database 130: throw new \Database_Exception(mysql_error($this->_connection), mysql_errno($this->_connection)); 131: } Warning!