会话变量在页面之间丢失 [英] Session variables lost between pages
本文介绍了会话变量在页面之间丢失的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在页面中,两个变量在URL中传递.
In a page, two variables are passed in a URL.
在第二页中,这些变量被初始化.提交时,将打开新页面.问题在这里,我无法恢复会话变量.
In the second page, these variables are initialized. At submit, new page open. The problem is here, I can't recover the session variables.
脚本指示错误(未定义的索引).
The script indicate a error (undefined index).
谢谢您的帮助.
代码在这里:
首页:
<?php
$requete_cours="SELECT COURS.SIGLE AS SIGLE, ANNEE FROM COURS, MODULE WHERE COURS.ID_MODULE = MODULE.ID_MODULE and ID_PERSONNE = $userid";
//$requete_cours;
$res = mysqli_query($cxn, $requete_cours);
echo (mysqli_error ($cxn));
while($ligne = mysqli_fetch_array($res)){
echo '<a href="professeur_absences.php?classe='.$ligne['ANNEE'].'&cours='.$ligne['SIGLE'].'">';
echo $ligne['ANNEE'].' - '.$ligne['SIGLE'].'</a>';
echo '<br/>';
}
?>
第二页:
$_SESSION['classe'] = $_GET['classe'];
$_SESSION['cours'] = $_GET['cours'];
第三页:
if(isset($_REQUEST['afficher'])){
$semaine = $_REQUEST['semaine'];
$classe = $_SESSION['classe'];
$cours = $_SESSION['cours'];
$_SESSION['semaine'] = $semaine;
$requete_cours_id = "SELECT ID_COURS FROM COURS WHERE SIGLE = $cours";
//echo $requete_cours;
$res = mysqli_query($cxn, $requete_cours_id);
echo (mysqli_error ($cxn));
$coursId = mysqli_fetch_array($res);
推荐答案
您必须通过在每个脚本的开头调用session_start()
来初始化会话.确保这始终是第一行,因为session_start()
发送标头.
You must initialize the session by calling session_start()
at the beginning of each script. Make sure this is always the first line, as session_start()
sends headers.
找到一些有关PHP文档中基本用法的示例.
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