<?php
// File name:	trimtext.inc.php
// Description:	PHP subroutine to trim a textarea input
// Date:	2004-06-10
// Author:	imacat <imacat@pristine.com.tw>
// Copyright:	Copyright (C) 2004-2007 Pristine Communications

// trimtext: Trim a textarea input, remove excess spaces
function trimtext($a)
{
    // Format the textarea input to UNIX text format
    $a = str_replace("\r\n", "\n", $a);
    // Trim the excess leading and trailing lines and spaces
    // This is not working.  Long articles may overload the PCRE limit.
    //$a = preg_replace("/^(?:[^\S\n]*\n)*(.*?)\s*$/us", "\\1", $a);
    $a = preg_replace("/^(?:[^\S\n]*\n)+/s", "", rtrim($a));
    // Remove the excess spaces at the end of each line
    $a = preg_replace("/[^\S\n]+\n/", "\n", $a);
    return $a;
}

?>