Question

这是php中的问题，我今天需要解决方案
请做我的作业

请问您能帮我做作业吗，因为我不在工作，但是我正在读大学，请您解决这个问题。

您可以向我解释此问题，还是可以连接到我的桌面以解决此问题，或者可以发送解释。

此代码

index.php：

<!DOCTYPE html>
<html>
<head>
 <title></title>

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
</head>
<body>

<?php require_once 'process.php'?>
<?php 

if(isset ($_SESSION['message']));?>

<div class="alert alert-<?=$_SESSION['msg_type']?>">
<?php

echo $_SESSION['message'];
unset($_SESSION['message']);

// and this problem !
<?php endif ?>
?>
<div class="contener">
<?php 
    $mysqli = new mysqli('localhost', 'root', 'rootroot','crudcrud') or die(mysqli_error($mysqli));
    $result = $mysqli->query("SELECT * FORM data") or die($mysqli->error);

?>
<div class="row justify-content-center">
    <table class="table">
        <thead>
            <tr>
            <th>usernames</th>
            <th>Passowrds</th>
            <th colspan="2">Action</th>
            <tr>
</thead>
</div>
    <?php while ($row = $result->fetch_assoc()): ?>
        <tr>
        <td><?php echo $row ['username'];?></td>
        <td><?php echo $row ['password'];?></td>
        <td>
            <a href="index.php?edit=<?php echo $row ['id']; ?>"
            class="btn btn-info">edit</a>
            <a hraf="process.php?delete=<?php echo $row ['id']; ?>"
            class="btn btn-danger">
        </td>

</tr>
//this problem !
<?php endwhile; ?>
</table>


<?php
function pre_r( $arry ){
    echo'<pre>';
    print_r($array);
    echo'</pre>';

}
?>

  <div class="col-lg-6 m-auto">

 <form action="process.php" method="post">
 <input type="hidden" name="id" value=" <?php echo $id ?> "
 <br><br><div class="card">

 <div class="card-header bg-dark">
 <h1 class="text-white text-center">  Insert Operation </h1>
 </div><br>

  <label> Username: </label>
 <input type="text" name="username" class="form-control" value=" <?php echo $username; ?> " placeholder="Enter Your Username"> <br>

  <label> Password: </label>
 <input type="text" name="password" class="form-control" value=" <?php echo $password; ?> " placeholder="Password"> <br>
     <?php
     if ($update == true)
     ?>
          <button class="btn btn-info" type="submit" name="update"> update </button>
     <?php else: ?>
     <button class="btn btn-success" type="submit" name="save"> Submit </button>

// and this problem !
     <?php endif; ?>

  </div>
 </form>
 </div>
</div>
</body>
</html>

代码

process.php

=======================================================

    <?php 
    session_start();

    $mysqli = new mysqli('localhost', 'root', 'rootroot','crudcrud') or
        die(mysqli_error($mysqli));

    $id = 0;
    $update = false;
    $username = '';
    $password = '';

    if (isset ($_POST['save'])){
        $usernames = $_POST['username'];
        $passwords = $_POST['password'];

        $mysqli->query("INSERT INTO data (username, password) VALUES('$username', '$password')") or
            die($mysqli->error);

        $_SESSION['message'] = "Record has been saved!";
        $_SESSION['msg_type'] = "success!";

        header('loocation: index.php');

    }
    if (isset ($_GET['delete'])){
        $id = $_GET['delete'];
        $mysqli->query("DELETE FROM data WHERE id=$id") or
        die($mysqli->error());
        SESSION['message'] = "Record has been deleted!";
        SESSION['msg_type'] = "denger!";
        header('loocation: index.php');
    }
    if (isset ($_GET['edit'])){
        $id = $_GET['edit'];
        $update = true;
        $result = $mysqli->query("DELETE FROM data WHERE id=$id") or
        die($mysqli->error());

    if (count($result)==1){
     $row = $result->fetch_array();
        $username = $row['username'];
        $password = $row['password'];
        }
    }
    if (isset($_POST['update'])){

        $id = $_POST['id'];
        $username = $_POST['username'];
        $password = $_POST['password'];
        $mysqli->query("UPDATE data SET username='$username', password='$password' WHERE id=$id") or
        die($mysqli->error);

        $_SESSION['message'] = "Record has been Update!";
        $_SESSION['msg_type'] = "warning!";

        header('loocation: index.php');

    }

Answer 1

这是完全错误的：

if(isset ($_SESSION['message']));?>  //<-- : not ;

<div class="alert alert-<?=$_SESSION['msg_type']?>">
<?php

echo $_SESSION['message'];
unset($_SESSION['message']);

//<-- no closing tag
<?php endif ?> //<-- missing ;

应该是：

if(isset ($_SESSION['message'])):?>

<div class="alert alert-<?=$_SESSION['msg_type']?>">
<?php

echo $_SESSION['message'];
unset($_SESSION['message']);

endif; ?>

当您在同一文件中使用大量PHP和HTML时，这非常难看，可能是时候考虑使用模板引擎了。

我的第一个项目的if和{endif}和{endwhile}是否有问题？

1 个答案: