php - echo 在输出浏览器端没有显示任何内容

Question

这应该打印在输出浏览器端:

$form = <<<EOT
<form action="register.php" method="POST">
First Name: <input type="text" name="name" /></br>
Last Name: <input type="text" name="lname" /></br>
Username: <input type="text" name="uname" /></br>
Email: <input type="text" name="email1" /></br>
Confirm Email: <input type="text" name="email2" /></br>
Password: <input type="password" name="pass1" /></br>
Confirm Password: <input type="password" name="pass2" /></br>
<input type="submit" value="Register" name="submit" />
</form>
EOT;
echo $form;

但是什么都没有。

这是我的完整代码，我应该首先添加它。

<?php
    require("config.php");
?>
<?php
if(isset($_POST['submit'])){

    $email1 = $_POST['email1'];
    $email2 = $_POST['email2'];
    $pass1 = $_POST['pass1'];
    $pass2 = $_POST['pass2'];

    if($email1 == $email2) {
        if($pass1 == $pass2) {
    //All good. Nastavi broo.

        $name = mysql_escape_string($_POST['name']);
        $lname = mysql_escape_string($_POST['lname']);
        $uname = mysql_escape_string($_POST['uname']);
        $email1 = mysql_escape_string($email1);
        $email2 = mysql_escape_string($email2);
        $pass1 = mysql_escape_string($pass1);
        $pass2 = mysql_escape_string($pass2);

    }else{
      echo "Sorry, your password is not corrext.";
      exit();
    }
}else{
  echo "Sorry!";
}

$form = <<<EOT
<form action="register.php" method="POST">
First Name: <input type="text" name="name" /></br>
Last Name: <input type="text" name="lname" /></br>
Username: <input type="text" name="uname" /></br>
Email: <input type="text" name="email1" /></br>
Confirm Email: <input type="text" name="email2" /></br>
Password: <input type="password" name="pass1" /></br>
Confirm Password: <input type="password" name="pass2" /></br>
<input type="submit" value="Register" name="submit" />
</form>
EOT;
echo $form;

}
?>

Answer 1

您的表单只会在您单击提交按钮后出现，因为它设置在 if(isset($_POST['submit'])){...} 中条件语句。因此，您需要移动最后一个大括号 }以上$form = <<<EOT .

} // it belongs here instead of below echo $form;
$form = <<<EOT
<form action="register.php" method="POST">
First Name: <input type="text" name="name" /></br>
Last Name: <input type="text" name="lname" /></br>
Username: <input type="text" name="uname" /></br>
Email: <input type="text" name="email1" /></br>
Confirm Email: <input type="text" name="email2" /></br>
Password: <input type="password" name="pass1" /></br>
Confirm Password: <input type="password" name="pass2" /></br>
<input type="submit" value="Register" name="submit" />
</form>
EOT;

echo $form;

?>

并确保您以 http://localhost/file.php 访问它而不是 c://file.php

---

编辑:

这里是一个重写:

<?php
require("config.php");
?>
<?php
if(isset($_POST['submit'])){

$email1 = $_POST['email1'];
$email2 = $_POST['email2'];
$pass1 = $_POST['pass1'];
$pass2 = $_POST['pass2'];

if($email1 == $email2) {
    if($pass1 == $pass2) {
//All good. Nastavi broo.

$name = mysql_escape_string($_POST['name']);
$lname = mysql_escape_string($_POST['lname']);
$uname = mysql_escape_string($_POST['uname']);
$email1 = mysql_escape_string($email1);
$email2 = mysql_escape_string($email2);
$pass1 = mysql_escape_string($pass1);
$pass2 = mysql_escape_string($pass2);


}else{
  echo "Sorry, your password is not corrext.";
  exit();
}
}else{
  echo "Sorry!";
}

} // brace for submit conditional

$form = <<<EOT
<form action="register.php" method="POST">
First Name: <input type="text" name="name" /></br>
Last Name: <input type="text" name="lname" /></br>
Username: <input type="text" name="uname" /></br>
Email: <input type="text" name="email1" /></br>
Confirm Email: <input type="text" name="email2" /></br>
Password: <input type="password" name="pass1" /></br>
Confirm Password: <input type="password" name="pass2" /></br>
<input type="submit" value="Register" name="submit" />
</form>
EOT;
echo $form;

?>

---

密码

我还注意到您可能以明文形式存储密码。不推荐这样做。如果您打算对此进行直播，请阅读以下内容。

使用以下之一:

• CRYPT_BLOWFISH
• crypt()
• bcrypt()
• scrypt()
• On OPENWALL
• PBKDF2
• PBKDF2 on PHP.net
• PHP 5.5 password_hash() 功能。
• 兼容包(如果 PHP < 5.5)https://github.com/ircmaxell/password_compat/

其他链接:

• PBKDF2 For PHP