note 57708 added to function.str-replace

How would you make it so that it does a random number. $text[post_text]=str_replace("\n", "<br>", $text[post_text]); $text[post_text]=str_replace("[b]", "<b>", $text[post_text]); $text[post_text]=str_replace("[/b] ", "</b>", $text[post_text]); $text[post_text]=str_replace("[i]", "<i>", $text[post_text]); $text[post_text]=str_replace("[/i]", "</i>", $text[post_text]); $text[post_text]=str_replace("[u]", "<u>", $text[post_text]); $text[post_text]=str_replace("[/u]", "</u>", $text[post_text]); $text[post_text]=str_replace("&lt;", "<", $text[post_text]); $text[post_text]=str_replace("&gt;", ">", $text[post_text]); I need it so that [b:(10 RANDOM NUMBERS HERE)] is replaced with <b> ---- Manual Page -- http://www.php.net/manual/en/function.str-replace.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+57708 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+57708&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+57708&report=yes Search -- http://master.php.net/manage/user-notes.php