Regular Expression

[alirezaok]

hi
i have some texts and they have ( number ) in them.
i want to remove "( number )" of them by ereg_replace. i tried to write regular for it but could not sucess.
may you help me with this?
thanks

$string = 'this is ( 474 ) book';
preg_replace("(.*)[(0-9)]*(.*)", "",$string);
echo $string;

result must be: this is book

[laserlight]

This should be relatively trivial, e.g.,

<?php
$string = 'this is ( 474 ) book';
$string = preg_replace('/\( \d+ \)/', '', $string);
echo $string;