php man page for restore_error_handler

RESTORE_ERROR_HANDLER(3)						 1						  RESTORE_ERROR_HANDLER(3)

restore_error_handler - Restores the previous error handler function

SYNOPSIS
       bool restore_error_handler (void  )

DESCRIPTION
	Used  after  changing  the  error handler function using set_error_handler(3), 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(3) example

	       Decide if unserialize(3) caused an error, then restore the original error handler.

	      <?php
	      function unserialize_handler($errno, $errstr)
	      {
		  echo "Invalid serialized value.
";
	      }

	      $serialized = 'foo';
	      set_error_handler('unserialize_handler');
	      $original = unserialize($serialized);
	      restore_error_handler();
	      ?>

	      The above example will output:

	      Invalid serialized value.

SEE ALSO
       error_reporting(3), set_error_handler(3), restore_exception_handler(3), trigger_error(3).

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