Php Database Error
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here for a quick overview of the site Help Center Detailed answers to any questions you might have http://stackoverflow.com/questions/6120589/is-there-any-way-to-catch-mysql-and-database-errors-in-php Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with http://www.dreamincode.net/forums/topic/185726-database-error-handling-in-php-5/ us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just mysql error like you, helping each other. Join them; it only takes a minute: Sign up Is there any way to catch MySQL and database errors in 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'@'101.190.193.83' (using password: YES) Could not connect: Access denied php database error for user 'test'@'101.190.193.83' (using password: YES)" But truly there is no change in the password. Is there any way to capture this error in a log file and show some nice message on the screen, like "Server error. Please try again some time." php mysql error-handling mysql-error-1045 share|improve this question edited Jun 4 '11 at 7:24 Peter Mortensen 10.3k1369107 asked May 25 '11 at 6:49 ASD 1,45692647 I'm actually working on an Open Source project to catch errors, show a nice message on the screen and log them with much more information than the standard error log provides. 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 warning, you have to use the "@" operator $connect = @mysql_connect(HOST, USER, PASS);//won't display the warning if any. if (!$connect) { echo 'Server error. Please try again sometime. CON'; } You may also consider setting
PHP 5 making use of Exception Handling Rate Topic: #1 Dormilich 痛覚残留 Reputation: 4051 Posts: 12,578 Joined: 08-June 10 Posted 12 August 2010 - 02:31 PM POPULAR Database Error Handling in PHP 5 prerequisites a working installation of PHP 5 Introduction The following error message is probably one of the most encountered, when using PHP: QuoteWarning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in *** on line *** The reason for that is usually no error handling at all, so that boolean false (the return value of a failed query) is passed to a mysql_fetch_* function. The traditional way of database error handling tests the return value of each database function and kill the script, if the return value is false: // connect $cxn = mysql_connect($host, $user, $password) or die(mysql_error()); mysql_connect_db($database) or die(mysql_error()); // $sql being an SQL statement, that returns a result set $result = mysql_query($sql) or die(mysql_error()); while($row = mysql_fetch_assoc($result)) { // your result handling code } or to put it into one sentence … QuoteAlso note that it is your responsibility to die() if necessary. (ref.) While this indeed prevents the emission of PHP error messages, it has the great disadvantage of breaking your output. If this happens on a web page, you might end up with a half processed page, which not only looks ugly, but also exposes parts of your working code (the SQL error message, which can contain info of your database structure) to the user. Gentle users may ignore that, crackers will use that to exploit and crack your server. A far bigger problem is when you use XML output (RSS/Atom feeds, AJAX, XHTML served as such, etc.). XML parsers have the nasty habit to quit parsing not well-formed XML and throw a parser error (the so-called "Yellow Screen of Death"), which effectively kills your application using that output. PHP 5 -- let it flow What you need to do to prevent that is controlling the program flow without breaking the script's output. PHP 5 with its improved OOP capabilities finally provide you with a means to do that efficiently: Exceptions. You can imagine an Exception as a kind of error message, that travels through the function stack until it reaches the top level (the global sc