<?phpfunction loseSpace($pcon){    $pcon = preg_replace("/ /","",$pcon);    $pcon = preg_replace("/&nbsp;/","",$pcon);    $pcon = preg_replace("/　/","",$pcon);    $pcon = preg_replace("/\r\n/","",$pcon);    $pcon = str_replace(chr(13),"",$pcon);    $pcon = str_replace(chr(10),"",$pcon);    $pcon = str_replace(chr(9),"",$pcon);    return $pcon;}?>

var_dump("            开头有空格          中间 有空格 中间有换行符 \r\n 结束有空格 ");

var_dump(loseSpace("            开头有空格          中间 有空格 中间有换行符 \r\n 结束有空格 "));