Question

我正在使用WAMP尝试学习一点PHP和SQL。我试图从一个非常基本的表中获取用户输入：

<form action="input.php" method="post" class="registration_form"/>
  <fieldset>
    <div class="elements">
      <label for="name">Username :</label>
      <input type="text" id="name" name="name" size="25" />
    </div>
    <div class="elements">
      <label for="e-mail">E-mail :</label>
      <input type="text" id="e-mail" name="e-mail" size="25" />
    </div>
    <div class="elements">
      <label for="Password">Password:</label>
      <input type="password" id="Password" name="Password" size="25" />
    </div>
    <div class="submit">
     <input type="hidden" name="formsubmitted" value="TRUE" />
      <input type="submit" value="Register" />
    </div>
  </fieldset>
</form>

我希望能够输入并发布到数据库。我一直试图用这段代码来实现这个目标：

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";

//Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
 //Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 


$sql = "INSERT INTO MyGuests (name, email, password)
VALUES ($_POST[name], $_POST[e-mail], $_POST[password])";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;//
}

$conn->close();
var_dump('name', 'e-mail', 'password');

?>

当我尝试插入＆＃34;＆＃34;如$ _POST [＆＃34; name＆＃34;]我收到错误：

Parse error: syntax error, unexpected '' (T_ENCAPSED_AND_WHITESPACE), expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in C:\wamp\www\input.php on line 16

当我尝试删除＆＃34;＆＃34;我收到这个错误：

Parse error: syntax error, unexpected '' (T_ENCAPSED_AND_WHITESPACE), expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in C:\wamp\www\input.php on line 16

我还尝试在代码顶部设置变量：

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";
$name=$_POST['name']

//Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
 //Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 


$sql = "INSERT INTO MyGuests (name, email, password)
VALUES ('name','email', 'password');

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;//
}

$conn->close();
var_dump('name', 'e-mail', 'password');

?>

这样我最终收到一条错误消息：

( ! ) Parse error: syntax error, unexpected '$conn' (T_VARIABLE) in C:\wamp\www\input.php on line 9

我能够使用$ _POST在另一个脚本中回显该名称，我不知道为什么它不能与SQL命令一起使用。如果有人会帮忙，和/或给我一些资源来学习/学习，我会很感激！

Answer 1

你遗失了＆＃39 ;;＆＃39;后： $名称= $ _ POST [＆＃39;名称＆＃39;]

Answer 2

嗨请注意一些要点

1）您将收到未定义索引的警告，因为您没有检查已发布的值。我们应该在使用值之前使用isset()。

2）第二次尝试使用lowercase，只要你给php中的任何标记赋予任何名称，以确保因输入lowercase或uppercase而没有错误。

3）如果您的单词很长，请尝试使用underscore，请使用e_mail;

因此，您可以使用此php代码

     <?php

      if(isset($_POST['register'])){
    $servername = "localhost";
    $username = "root";
    $password = "";
    $dbname = "test";
    $conn = new mysqli($servername, $username, $password, $dbname);
     //Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 

     $name = $_POST['name'];
     $email = $_POST['e_mail'];
     $password = $_POST['password'];
    $sql = "INSERT INTO MyGuests(name, email, password) VALUES('$name','$email','$password')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;//
}

$conn->close();
      }
      ?>

我已将submit按钮添加到e-mail改为e_mail，name="Password"改为name="password"

<form action="input.php" method="post" class="registration_form"/>
  <fieldset>
    <div class="elements">
      <label for="name">Username :</label>
      <input type="text" id="name" name="name" size="25" />
    </div>
    <div class="elements">
      <label for="e-mail">E-mail :</label>
      <input type="text" id="e_mail" name="e_mail" size="25" />
    </div>
    <div class="elements">
      <label for="Password">Password:</label>
      <input type="password" id="Password" name="password" size="25" />
    </div>
    <div class="submit">
     <input type="hidden" name="formsubmitted" value="TRUE" />
      <input type="submit" value="Register" name="register" />
    </div> 
  </fieldset>
</form>

$ _POST [＆＃39; var＆＃39;]进入MySQL数据库？

2 个答案: