restore_error_handler
    (PHP 4 >= 4.0.1, PHP 5)
restore_error_handler -- Restores the previous error handler function
Description
bool 
restore_error_handler ( void  )
   Used after changing the error handler function using
   set_error_handler(), to revert to the previous error
   handler (which could be the built-in or a user defined function). 
  
Return Values
   This function always returns TRUE.
  
Examples
   
Example 1. restore_error_handler() example 
     Decide if unserialize() caused an error, then
     restore the original error handler.
     
<?php function unserialize_handler($errno, $errstr) {     echo "Invalid serialized value.\n"; }
  $serialized = 'foo'; set_error_handler('unserialize_handler'); $original = unserialize($serialized); restore_error_handler(); ?>
 |  
 The above example will output: Invalid serialized value.  |  
  | 
  Notes
Note: 
    Calling restore_error_handler() from the
    error_handler function is ignored.