Php Error Debugging Info
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and found it very interesting, thought it might be something for you. The article is called How to Debug in PHP and is located at http://blog.teamtreehouse.com/how-to-debug-in-php.CaptchaSubmitNobody enjoys the process of debugging their code. If you want to build killer web apps though, it's vital error reporting php ini that you understand the process thoroughly. This article breaks down the fundamentals of debugging in PHP, php verbose command line helps you understand PHP's error messages and introduces you to some useful tools to help make the process a little less painful. Doing your php error reporting all Ground Work It is important that you configure PHP correctly and write your code in such a way that it produces meaningful errors at the right time. For example, it is generally good practice to turn on a verbose level php display_errors of error reporting on your development platform. This probably isn't such a great idea, however, on your production server(s). In a live environment you neither want to confuse a genuine user or give malicious users too much information about the inner-workings of your site. So, with that in mind lets talk about the all too common "I'm getting no error message" issue. This is normally caused by a syntax error on a platform where the developer has not done
Php Debug Log
their ground work properly. First, you should turn display_errors on. This can be done either in your php.ini file or at the head of your code like this: ini_set('display_errors', 'On'); Tip: In these code examples I omit the closing (?>) PHP tag. It is generally considered good practice to do so in files which contain only PHP code in order to avoid accidental injection of white space and the all too common "headers already sent" error. Next, you will need to set an error reporting level. As default PHP 4 and 5 do not show PHP notices which can be important in debugging your code (more on that shortly). Notices are generated by PHP whether they are displayed or not, so deploying code with twenty notices being generated has an impact upon the overhead of your site. So, to ensure notices are displayed, set your error reporting level either in your php.ini or amend your runtime code to look like this: ini_set('display_errors', 'On');
error_reporting(E_ALL); Tip: E_ALL is a constant so don't make the mistake of enclosing it in quotation marks. With PHP 5 it's also a good idea to turn on the E_STRICT level of error reporting. E_STRICT is useful for ensuring you're coding using the best possible standards. For example E_STRICT helps by warning you that you're using a deprecated function. Here's how to enable it at runtime:
and Objects Namespaces Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General
Php Error Reporting Not Working
considerations Installed as CGI binary Installed as an Apache module Session debug php code Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding php xdebug PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line http://blog.teamtreehouse.com/how-to-debug-in-php usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text http://php.net/manual/en/function.error-reporting.php MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation Keyboard Shortcuts? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search(current page) / Focus search box restore_error_handler » « error_log PHP Manual Function Reference Affecting PHP's Behaviour Error Handling Error Handling Functions Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug error_reporting (PHP 4, PHP 5, PHP 7)error_reporting — Sets which PHP errors are reported Description int error_reporting ([ int $level ] ) The error_reporting() function sets the error_reporting directive at runtime. PHP has many levels of errors, using this function sets that level for the duration (runtime) of your script. If the optio
sourceTechnical library Debugging techniques for PHP programmersUsing print statements, error reporting, and the PHPeclipse plug-in Explore various methods for debugging PHP applications, including turning on error reporting in https://www.ibm.com/developerworks/library/os-debug/ Apache and PHP, and by placing strategic print statements to https://www.mediawiki.org/wiki/Manual:How_to_debug locate the source of more difficult bugs through a simple example PHP script. The PHPeclipse plug-in for Eclipse, a slick development environment with real-time syntax parsing abilities, will also be covered, as well as the DBG debugger extension for PHPeclipse. Share: Tyler Anderson, php error Freelance writer Close [x] Tyler Anderson received both his B.S. in Computer Science in 2004 and his M.S. in Electrical and Computer Engineering in 2005 from Brigham Young University. Tyler has written and coded numerous articles and tutorials for IBM developerWorks and DevX. 29 November 2005
Table of contents Introduction Setting up php error reporting Error messages Introducing print statements Using PHPeclipse Using the debugger Summary Download Resources Comments IntroductionThere are many PHP debugging techniques that can save you countless hours when coding. An effective but basic debugging technique is to simply turn on error reporting. Another slightly more advanced technique involves using print statements, which can help pinpoint more elusive bugs by displaying what is actually going onto the screen. PHPeclipse is an Eclipse plug-in that can highlight common syntax errors and can be used in conjunction with a debugger to set breakpoints.Setting upTo learn the concepts described in this article, you are going to need PHP, a Web server, and Eclipse. The latest version of PHP supported by the debugger extension is V5.0.3. We need a Web server to parse the pages you create in PHP and display them to the browser. This article uses Apache V2. However, any Web server will suffice. To take advantage of some of titaliano• 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.