我的 php 有问题，用户更新的数据未显示在页面中，它仅显示以前的数据而不显示更新的数据，但信息已在数据库中更新这是我的 updateForm.php： <?php session_start(); $std = $_SESSION; ?> <!DOCTYPE html> <html> <head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Student Profile | MyMerit</title><!-- Fonts--><link href="https://fonts.googleapis.com/css? family=Archivo+Narrow:300,400,700%7CMontserrat:300,400,500,600,700,800,900" rel="stylesheet"><link rel="stylesheet" href="plugins/font-awesome/css/font-awesome.min.css"><link rel="stylesheet" href="plugins/ps-icon/style.css"><!-- CSS Library--><link rel="stylesheet" type="text/css" href="css/style.css" /><link rel="stylesheet" href="plugins/bootstrap/dist/css/bootstrap.min.css"> </head><div class="header--sidebar"></div><header class="header"> <div class="header__top"> <div class="container-fluid"> <div class="row"> <div class="col-lg-6 col-md-8 col-sm-6 col-xs-12"> <p>Welcome to MyMerit</p> </div> <div class="col-lg-6 col-md-3 col-sm-6 col-xs-12"> <div class="header__actions"><a href="stdLogin.php"><i class="fas fa-sign-out-alt"> </i>Back</a></div> </div> </div> </div> </div></header><body><div class="col-lg-4 col-lg-offset-4"> <div class="page-header"> <h2>Student Profile Update</h2> </div> <form action="stdUpdateData.php" method="POST"> <div class="form-group"> <div class="input-group col-xs-15"> <span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span> <input type="text" class="form-control" name="stdName" placeholder="Username" required> </div> </div> <div class="form-group"> <div class="input-group col-xs-15"> <span class="input-group-addon"><i class="glyphicon glyphicon-credit-card"></i></span> <input type="text" class="form-control" name="stdMatric" placeholder="Matric No" required> </div> </div>
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