note 29108 added to function.eregi-replace

say i want to use a form, and in it there is a textarea called text, how can i change the text a user puts in to different text...like say they put in 'xpx' and i want it to change to 'pxp' do i have to a eregi_replace for every letter, or how do i do this? -- http://www.php.net/manual/en/function.eregi-replace.php http://master.php.net/manage/user-notes.php?action=edit+29108 http://master.php.net/manage/user-notes.php?action=delete+29108 http://master.php.net/manage/user-notes.php?action=reject+29108