截取字符串，其后在拼装起来。给个思路各位

$str = '三部处置室护理费+三部处置室护理治疗费+三部处置室化验费+(三部处置室床日总量+三部处置室入院人数*3+三部处置室出院人数*0.3)';
preg_match_all("|[^0-9*.+()]+|", $str, $matches);
$ar_txt = array_values($matches[0]);
$ar_val = array(1,2,3,4,5,6); //中文项目对应的价格数值
$str = str_replace($ar_txt, $ar_val, $str);
echo $str; //1+2+3+(4+5*3+6*0.3)