Question

我有一个非常简单的PHP脚本，它接受XML的值并将其保存在$ _SESSION中。但是，当页面更改并且我想要检索此值时，它们是空的。以下是采用值的方法：

session_start();
if (isset($_REQUEST["LocalitatForm"])) {
recollirDades();
}

function recollirDades(){
    $localitat =  $_REQUEST["localitat"];
    $data = $_REQUEST["data"];
    $min = 0;
    date_format($data, 'Y-m-d');
    $xmlDoc = simplexml_load_file("../data/".$localitat.".xml");
    foreach ($xmlDoc->prediccion->dia as $dia){     
        if($dia['fecha'] == $data){
            $min = $dia->temperatura->minima;
            $max = $dia->temperatura->maxima;
        }
    }

    $_SESSION["localitat"] = $localitat;
    $_SESSION["data"] = $data;
    $_SESSION["min"] = $min;
    $_SESSION["max"] = $max;
    header("location: ../views/Temperatura.php");
}

以下是应该显示值的文档（“Temperatura.php”）：

<?php
session_start();
echo $_SESSION["localitat"]." ".  $_SESSION["data"] . " " .         
$_SESSION["min"];
$localitat = $_SESSION["localitat"];
$data = $_SESSION["data"];
$min = $_SESSION["min"];
$max = $_SESSION["max"];
?>
<html>
<head>
    <title>Temperatura</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
      <div id='data'>
        Localitat: <?php echo ucfirst($localitat)?><br>
        Data: <?php echo $data ?><br>
        Temperatura mínima: <?php echo $min  ?>ºC<br>
        Temperatura màxima: <?php echo  $max   ?>ºC<br>
    </div>
    <a href='../index.php'><input type='button' value='Tornar a  buscar'>        
   </a>

</body>
</html>

在第一个文件中，值是正确的，我已经用回声检查了它。

Answer 1

好的，我发现了问题。您无法立即在$ _SESSION中存储XML节点的值。在这种情况下，我将其转换为字符串。所以方法的代码是这样的：

session_start();
if (isset($_REQUEST["LocalitatForm"])) {
recollirDades();
}

function recollirDades(){
$localitat =  $_REQUEST["localitat"];
$data = $_REQUEST["data"];
$min = 0;
date_format($data, 'Y-m-d');
$xmlDoc = simplexml_load_file("../data/".$localitat.".xml");
foreach ($xmlDoc->prediccion->dia as $dia){     
    if($dia['fecha'] == $data){
        $min = (string)$dia->temperatura->minima;
        $max = (string)$dia->temperatura->maxima;
    }
}

$_SESSION["localitat"] = $localitat;
$_SESSION["data"] = $data;
$_SESSION["min"] = $min;
$_SESSION["max"] = $max;
header("location: ../views/Temperatura.php");
}

PHP - 会话不存储变量值

1 个答案: