Error Handling Features
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delivery errors are sent for disposition. The error handling address is defined by using the "Errors-To=" list header keyword. The value for "Errors-To=" can be one of two error handling functions in c things: • An appropriate access-level, such as OWNER • A specific internet-address,
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such as someuser@somehost.com It is strongly recommended that "Errors-To=" point to a real person's mailbox, rather than to
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an alias that simply dumps errors into something like /dev/null. Mail delivery errors generally indicate that a problem exists, and it's always possible to filter out the ones that don't via
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procmail or by using the filtering features available in most POP mail clients. After a long enough period of time, unhandled errors can grow to a significant percentage of your server's traffic and seriously impact your production. The internet address of the list is explicitly disallowed as an error-receiving address, and attempting to set Errors-To= to the internet address of the list error handling php will raise an error. The list should never be configured to receive its own errors as this is guaranteed to cause looping. If not defined in the list header, "Errors-To=" defaults to "Errors-To= Owners". It should be carefully noted that there is no way to automatically discard errors without sending them to some address. "Errors-To= No" and "Errors-To= None" are both invalid settings and will cause LISTSERV to revert to the default. 13.2 The Auto-Deletion Feature LISTSERV includes a powerful auto-deletion filter that can be configured in several modes, depending on the level of error handling desired by the list owner. Currently, LISTSERV understands and can take action on errors generated by all mailers compliant with the so-called "Notary" format described in RFC1893. As more and more mailers conform to RFC1893, LISTSERV naturally will be capable of handling more and more errors intelligently. To set up auto-deletion defaults for a list, use the syntax described in the List Keyword Reference document for the "Auto-Delete=" list header keyword. A sample error monitoring report, generated daily and sent to the list's "Errors-To=" address if
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Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed http://php.net/manual/en/ref.errorfunc.php as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP https://msdn.microsoft.com/en-us/library/ms973849.aspx 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 error handling 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 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 error handling functions 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 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 debug_backtrace » « Examples PHP Manual Function Reference Affecting PHP's Behaviour Error Handling Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug Error Handling Functions See Also See also syslog(). Table of Contentsdebug_backtrace — Generates a backtracedebug_print_backtrace — Prints a backtraceerror_clear_last — Clear the most recent errorerror_get_last — Get the last occurred errorerror_log — Send an error message to the defined error handling routineserror_re
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