Custom Error Message Generation

Option: message_callback
Option: context_callback

There are two methods of HTML_CSS_Error designed for use with generating error messages efficiently. To use them, you must set the options below in the HTML_CSS class constructor (argument #2):

Option: message_callback

The default message handling callback (HTML_CSS_Error::_getErrorMessage) get an array mapping error codes to error message templates, like so:

$messages = array(
    HTML_CSS_ERROR_UNKNOWN =>
        'unknown error',
    HTML_CSS_ERROR_INVALID_INPUT =>
        'invalid input, parameter #%paramnum% '
      . '"%var%" was expecting '
      . '"%expected%", instead got "%was%"'
);

Basically, if a variable name is enclosed in percent signs (%), it will be replaced with the value passed in the associative array.

Option: context_callback

The default context handling callback (HTML_CSS_Error::getBackTrace) gets an array of execution functions and discovers where the error was generated.

Prev	Up
Error Context Display	Home

HTML_CSS : The Definitive Guide