post action子页面session丢失

Question

"; //echo ("数印损耗成本").$xShuYinSunHaoChengBen; //echo "
"; //echo ("单个印刷成本").$xDanGeYinShuaChengBen; //echo "
"; echo ("保留后单价").$_SESSION["danjia"]; echo "
"; echo ("本单总价").$_SESSION["zongjia"]; echo "
"; echo ("版费").$_SESSION["banfei"]; echo "
"; } ?>

      <form  id="formadd" name="formadd" method="post" action="zhongfengdai_baobiao.php">   
        <!-- <form id="formadd" name="formadd" method="post" action="">  -->
    <input name="add" type="submit"  id="add" value=" 自动报价 " /> 
    <input name="re" type="button"  id="re" value=" 返回取消 " onclick="history.back();" />
    </form>

'; print_r($_SESSION); echo ''; echo "单价".$djia; echo "
"; echo "总价".$bdzjia; echo "
"; echo "重量".$zzhliang; echo "
"; echo "版费".$banfei; echo "
"; //$db->debug = true; //echo var_dump(is_writeable(ini_get("session.save_path"))); //echo var_dump(ini_get("session.save_path")); //echo var_dump($_SESSION["djia"]); //echo var_dump($_SESSION["bdzjia"]); //echo var_dump($_SESSION["zzhliang"]); // $djia=$_SESSION["djia"]; // if (isset($_SESSION['djia'])) { echo $_SESSION['djia']; } else { echo '没有值'; } //if (!empty($_SESSION['bdzjia'])) { echo $_SESSION['bdzjia']; } else { echo '没有值'; } //问题：post 如果action="" session值可以取出可以更新。如果使用 post action="zhongfengdai_baobiao.php"则session值不变化。不生效。 ?>

Answer 1

可以看下我的文章https://blog.csdn.net/qq_61409269/article/details/122762280