PHP Classes

Log watcher: Watch a log file and e-mail newly added lines

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logwatcher 1.0.0BSD LicenseLogging, Security


This class is meant to poll log files and take any newly added lines and send them to a given watcher e-mail address.

Although this class can be used to poll any type of log files, it was developed with the intention to overcome a limitation of the PHP error trapping system that is not able to capture certain types of errors like script parsing errors or file upload failures. Despite of this, these errors are sent to a log file if error logging is enabled in the PHP configuration.

The goal of this class is to capture the error messages sent to log files and send them by e-mail to a person responsible for a site, so any necessary action may be taken with minimal delay.

To use this class to watch the PHP error log, take the example script and adjust any values to match your PHP configuration.

For security reasons, in a production environment, you are strongly encouraged disable displaying PHP errors on Web pages and enable logging errors to a log file. A sample php.ini configuration file is provided to indicate which options should be set in a production environment.

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  • logwatcher.gif
  Files folder image Files  
File Role Description
Accessible without login Plain text file error_handler.php Aux. Example of an error handler function that logs the error message, the file name, line number, function name, class name, including backtrace of all the function calls that lead to the line where the error occurred.
Accessible without login HTML file log_watcher_class.html Doc. Class documentation extracted from inline meta-document comments
Plain text file log_watcher_class.php Class Log watcher class
Accessible without login Plain text file php.ini Data Sample PHP configuration with options set for maximum logging security in a production environment
Accessible without login Plain text file php_error_log.crontab Data Example of crontab line to execute the example log script to watch the PHP error log
Accessible without login Plain text file test_log_watcher.php Example Example of how to setup the class to watch a given log file, e-mail the newly added lines, if any, and exit 20KB
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Class DownloadWhy it is needed Dependency
MIME E-mail message sending Download .zip .tar.gz When the mail delivery method is meant to replaced by the urgent mail function Optional
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