Php Notice Error
Contents |
and Objects Namespaces Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes php.ini error reporting Context options and parameters Supported Protocols and Wrappers
Php Display_errors
Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session
Php Error_reporting
Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication
Php Hide Warnings
with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive php error types 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 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 GUI Extensions 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 Port
here for a quick overview of the site Help Center Detailed answers to any questions you might have 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 php hide errors us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow undefined index php Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up php error reporting not working How do you handle PHP notice (error) up vote 1 down vote favorite The following code generates a notice if $n is not set. Solving it requires an additional statement (isset($n)) or to "declare" the $n ($n=''). But what consequences does this http://php.net/manual/en/function.error-reporting.php notice have? The below code is a lot neater and lets say we turn error_reporing off in production no difference is visible frontend. Does something bad follows? Prestanda, readability etc? (sorry for the bad english) if($n==1){ //do something } php share|improve this question asked May 7 '11 at 12:19 Joseph 69931735 add a comment| 4 Answers 4 active oldest votes up vote 2 down vote accepted A notice means that while your code will work as expected, it isn't written "like it should be". http://stackoverflow.com/questions/5920987/how-do-you-handle-php-notice-error It's like the compiler telling you "I know what you mean here and I can do it, but you shouldn't rely on this. Please write it differently so I don't have to make assumptions". Therefore a notice by itself doesn't mean that something bad happens most of the time. However, I wouldn't call anyone who accepts notices in their code a professional programmer because fixing the notices is a pretty simple task and not having any notices says that you understand the language's basics well. If someone can't or don't want to do even this much, it says something about them. In your specific example, something like this should be done: $n = null; // or some other appropriate initial value // possibly change the value of $n here if($n==1) { //do something } Note that by writing the extra $n = null, you are not making the program any different as far as the compiler is concerned (it will end up doing that itself at the same time it gives out the notice anyway). But you are making it very different as far as someone reading the code is concerned: with this code they won't have a "WTF did this $n come from???" moment. share|improve this answer answered May 7 '11 at 12:26 Jon 273k40480600 A safe way is to use if(!isset($n)) $n = null; especially if $n may be set in a file that includes/requires this one. Or not. It implies you know what you're doing. &n
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about http://stackoverflow.com/questions/4624474/php-difference-between-notice-and-warning hiring developers or posting ads with 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 like you, helping each other. Join them; it only takes a minute: Sign up PHP difference between notice and warning up vote 23 down vote favorite 6 When writing code errors, warnings and notices can occur. I know the idea behind errors. I suppose a php error warning is there to inform you about something that can cause an error, but isn't a notice exaclty the same? I suppose a notice is not a message of something doing right ;). It's just a bit confusing to me. Can anybody tell the difference between those two and the way these messages should be treated. php error-handling share|improve this question edited Dec 24 '12 at 0:04 Charles 40.2k1069107 asked Jan 7 '11 at 10:17 Rene Terstegen 4,20093361 php notice error Warning means not "something that can cause an error" but error itself which already occurred. –Your Common Sense Jan 7 '11 at 10:43 add a comment| 6 Answers 6 active oldest votes up vote 31 down vote accepted A notice is an advisory message meaning "You probably shouldn't be doing what you're doing, but I'll let you do it anyway" A warning is a message saying "You are doing something wrong and it is very likely to cause errors in the future, so please fix it." Both notices and warnings will not halt execution of your script, although I would encourage you to take them seriously and strive to have not even one notice in your apps. share|improve this answer edited Jan 7 '11 at 10:49 answered Jan 7 '11 at 10:20 Jacob Relkin 115k23277286 add a comment| up vote 20 down vote Differences are explained here: http://www.php.net/manual/en/errorfunc.constants.php Specifficaly: Errors: Fatal run-time errors. These indicate errors that can not be recovered from, such as a memory allocation problem. Execution of the script is halted. Warnings: Run-time warnings (non-fatal errors). Execution of the script is not halted. Notices: Run-time notices. Indicate that the script encountered something that could indicate an error, but could also happen in the normal course of running a script. share|improve this answer edited Apr 8 '13 at 11:45 Mathias Lykkegaard Lorenzen 5,5041253121 answered Jan 7 '11 at 10:20 Mchl