Need help with regex

[zzz]

I need to cut the end of the string. I know the beginning but the end could be dirrerent. I think I need a wildcard but not sure what I'm doing wrong:

ereg_replace ("This part needs to be removed", "", $str)

I can match exactly the part but what is my $str is like this:

$str = 'asdasdasdasd sd asd asd ad. This part needs to...;

[wilku]

Firstly, as I heard a couple of times as well as read in php manual, preg_something functions are better then eregi_something, so use preg_replace.
Next, for the regex:

<?php
$query = 'Some text This part needs to be replaced some other text';
echo preg_replace('/This part needs(.*)$/','',$query);
?>

This will echo "Some text ".
It searches for the string "This part needs" and every character (dot) 0 or more times (asterisk) until the end of the string (dollar).
Get yourself some regex cheatsheat - learning the basics is not so difficult.