# 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.

### See Also

- error_reporting()
- set_error_handler()
- restore_exception_handler()
- trigger_error()