PHP error handling question.

[thundergod2k2]

I've never used any form of my own error handling, but as I've come across scripts for resource, I always see variables like $errno, $errstr, etc. without them actually being declared initially. Are they predefined to hold the error number and string when an error occurs?

[Graeme]

uk.php.net/set-error-handler

You must set your own error handling function through:

set_error_handler('FUNCTION_NAME');

The error details are passed as parameters to that function; in this order:

• errno
  
• errstr
  
• errfile
  
• errline
  
• errcontext
  

Only errno and errstr are required; the rest are optional.

The parameters you enter when constructing your function are the ones used to refer to the error. For instance:

<?php

function myErr($error_number, $error_string){
 echo 'ERROR['.$error_number.'] - '.$error_string;
}

set_error_handler('myErr');

?>

Notice the use of the variables $error_number and $error_string.

Hope that clears things up


*Just a little note.

"The following error types cannot be handled with a user defined function: E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING, and most of E_STRICT raised in the file where set_error_handler() is called."

[thundergod2k2]

I didn't really need help with creating my own error handler, I just wanted to know if the variables $errno and $errstr are given values by PHP, since in the scripts I've seen that use them I've never seen it ever manually put any values into them.

[Graeme]

Yes, and i showed how those variables are given.

I thought that would have been more helpful...