Php Debug Error Messages
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Php Display_errors
it only takes a minute: Sign up How to get useful error messages in PHP? up vote 369 down vote favorite 168 I find programming in PHP quite frustrating. Quite often I will try and run the script and
Php Verbose Command Line
just get a blank screen back. No error message, just empty screen. The cause might have been a simple syntax error (wrong bracket, missing semicolon), or a failed function call, or something else entirely. It is very difficult to figure out what went wrong. I end up commenting out code, entering "echo" statements everywhere, etc. trying to narrow down the problem. But there surely must be a better way, right?. So, is there a way to get PHP to produce php error reporting not working useful error message like Java does? Can anyone recommend good PHP debugging tips, tools and techniques? php debugging error-handling share|improve this question edited May 11 '13 at 23:52 hkBattousai 3,67683982 asked May 10 '09 at 9:48 Candidasa 2,95982330 coding.smashingmagazine.com/2011/11/30/… –Alex Jul 15 '12 at 14:54 1 Also see stackoverflow.com/q/1475297/632951 –Pacerier Oct 14 '14 at 9:37 @JuannStrauss, That's understating it. And when you finally see the errors, it says T_PAAMAYIM_NEKUDOTAYIM. Or maybe "must be an instance of integer, integer given". –Pacerier Apr 3 '15 at 20:02 Tutorial on this: code2real.blogspot.com/2015/06/… –Pupil Sep 9 '15 at 7:21 add a comment| 27 Answers 27 active oldest votes up vote 355 down vote accepted For syntax errors, you need to enable error display in the php.ini. By default these are turned off because you don't want a "customer" seeing the error messages. Check this page in the PHP documentation for information on the 2 directives: error_reporting and display_errors. display_errors is probably the one you want to change. If you can't modify the php.ini, you can also add the following lines to an .htaccess file: php_flag display_errors on php_value error_reporting 2039 You may want to consider using the value of E_ALL (as mentioned by Gumbo) for your version of PHP for error_reporting to get all of the errors. more info 3 other items: (1) You can check the error log file as it will
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Books eBooks Tickets Shop Jobs RSS Facebook Twitter Newsletter Search on Smashing Magazine Search Coding CSS HTML JavaScript Techniques Design Web Design Responsive Typography Inspiration Mobile iPhone & iPad Android Design Patterns Graphics Photoshop Fireworks Wallpapers Freebies UX Design https://www.smashingmagazine.com/2011/11/a-guide-to-php-error-messages-for-designers/ Usability User Experience UI Design E-Commerce WordPressWP Essentials Techniques Plugins Themes We use ad-blockers as well, you know. We gotta keep those servers running though. Did you know that we publish useful books and run friendly conferences https://www.mediawiki.org/wiki/Manual:How_to_debug — crafted for pros like yourself? E.g. upcoming SmashingConf Barcelona, dedicated to smart front-end techniques and design patterns. A Guide To PHP Error Messages For Designers By Rachel Andrew November 30th, 2011 PHP 15 Comments PHP is error reporting widely available with inexpensive hosting plans, which makes it a popular choice for developers who write software for the Web. From big platforms, such as WordPress, down to small scripts, such as ones to display image galleries or to send forms to email, thousands of script and products are out there written in PHP that can be installed and used even if you don’t know much about PHP yourself. I have been a PHP developer php error reporting for 10 years, and my company has developed a content management system, written in PHP, that is intended to be very simple to install and get started with. So, I spend a lot of time working with designers who are installing a PHP script for the first time. If you are installing a script and something goes wrong, PHP can be incredibly infuriating. Until you know what they mean, PHP errors can be baffling. My favorite message is: Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM Paamayim Nekudotayim means “double colon” in Hebrew! But double colon is a lot easier to debug than T_PAAMAYIM_NEKUDOTAYIM. This article is aimed at designers who are not PHP developers but need to install PHP scripts from time to time. Thus, the problems and error messages we will look at here are those you are most likely to encounter when installing scripts, rather than when writing PHP. The tips should help you work through other error messages and should at least help you give clear information to the script’s developer if you need to ask them for assistance. “All I Get Is A Blank Page!” Link Before we can diagnose PHP errors, we need to see some PHP errors. Ideally, you would first be installing the script locally, perhaps using MAMP on a Mac or XAMPP, both
italiano• 日本語• 한국어• polski• português• português do Brasil• русский• 中文 Contents 1 PHP errors 1.1 Turning display_startup_errors on 2 SQL errors 3 In-depth debugging 3.1 Debugger 3.1.1 Zend 3.1.2 HHVM 3.2 Logging 3.2.1 Setting up a debug log file 3.2.2 Creating a custom log file 3.2.3 Creating custom log groups 3.2.4 Structured logging 3.3 Statistics 3.4 Send debug data to an HTML comment in the output 3.5 Working live with MediaWiki objects 3.6 Callable updates 4 Client side debugging 5 See also This page gives a basic introduction to debugging MediaWiki software. One of the first things you will notice is that "echo" generally does not work; this is part of the general design. PHP errors[edit] To see PHP errors, add this to the bottom of LocalSettings.phpManual:LocalSettings.php: error_reporting( -1 ); ini_set( 'display_errors', 1 ); Or set it in php.iniManual:php.ini: error_reporting = E_ALL display_errors = On Or set in .htaccess: php_value error_reporting -1 php_flag display_errors On This will cause PHP errors to be shown on-page. This might make it easier for attackers to find a way into your server, so disable it again when you have found the problem. Note that fatal PHP errors may happen before the lines above are ever executed, or may prevent them from being shown. Fatal PHP errors are usually logged to Apache's error log – check the error_log setting in php.ini (or use phpinfo()) There are several configuration options to aid debugging. The following are all false by default. Enable them by setting them to true in your LocalSettings.phpManual:LocalSettings.php: $wgShowExceptionDetails Enable more details (like a stack trace) to be shown on the "Fatal error" page. $wgDebugToolbar Shows a toolbar on the page with profiling, log messages and more. $wgShowDebug Adds the "log messages" part of wgDebugToolbar as a raw list to the page. $wgDevelopmentWarnings MediaWiki will throw notices for