mysqli_real_escape_string()恰好需要2个参数，其中1个给定致命错误 [英] mysqli_real_escape_string() expects exactly 2 parameters, 1 given Fatal Error

问题描述

我一直收到此错误，并且在解决该问题时遇到了问题，在PHP中不好，因为仍在学习中.我正在使用注册表，正在使用PHP 5.6.我已经查看了有关较旧问题的其他答案，但没有成功.

I keep getting this errors and I am having problems fixing that, am not good in PHP because am still learning. I am working on a registration form and am using PHP 5.6. I have looked at other answers on older questions but I haven't succeeded.

这是我的代码:

<?php
session_start();
if (isset($_SESSION['user']) != "") {
    header("Location: index.html");
}
include_once 'dbconnect.php';

if (isset($_POST['signup'])) {
    $fname  = mysqli_real_escape_string($_POST['fullname']);
    $tphone = mysqli_real_escape_string($_POST['telephone']);
    $uemail = mysqli_real_escape_string($_POST['email']);
    $urole  = mysqli_real_escape_string($_POST['role']);
    $upass  = md5(mysqli_real_escape_string($_POST['upass']));

    $uname  = trim($uname);
    $tphone = trim($tphone);
    $email  = trim($email);
    $urole  = trim($role);
    $upass  = trim($upass);

    // email exist or not
    $query  = "SELECT email FROM users WHERE email='$uemail'";
    $result = mysqli_query($query);

    $count = mysqli_num_rows($result); // if email not found then register

    if ($count == 0) {

        if (mysqli_query("INSERT INTO users(firstname,telephone,email,role,pass) VALUES('$fname','$tphone','$uemail','$urole',$upass')")) {
?>
           <script>alert('successfully registered ');</script>
            <?php
        } else {
?>
           <script>alert('error while registering you...');</script>
            <?php
        }
    } else {
?>
           <script>alert('Sorry Email ID already taken ...');</script>
            <?php
    }

}
?> 

我一直遇到的错误是:

警告:mysqli_real_escape_string()恰好需要2个参数，第12行的C:\ Apache24 \ htdocs \ Timewise \ landing \ login.php中给出了1个参数

Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given in C:\Apache24\htdocs\Timewise\landing\login.php on line 12

警告:mysqli_real_escape_string()恰好需要2个参数，第13行的C:\ Apache24 \ htdocs \ Timewise \ landing \ login.php中给出了1个参数

Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given in C:\Apache24\htdocs\Timewise\landing\login.php on line 13

警告:mysqli_query()至少需要2个参数，第18行的C:\ Apache24 \ htdocs \ Timewise \ landing \ login.php中给出1个参数

Warning: mysqli_query() expects at least 2 parameters, 1 given in C:\Apache24\htdocs\Timewise\landing\login.php on line 18

警告:mysqli_fetch_array()期望参数1为mysqli_result，在第19行的C:\ Apache24 \ htdocs \ Timewise \ landing \ login.php中给出空值

Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, null given in C:\Apache24\htdocs\Timewise\landing\login.php on line 19

警告:mysqli_num_rows()期望参数1为mysqli_result，在第21行的C:\ Apache24 \ htdocs \ Timewise \ landing \ login.php中给出空值

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, null given in C:\Apache24\htdocs\Timewise\landing\login.php on line 21

能不能帮我这个忙，我需要知道我应该如何实际解决这个问题.

Can you please help me on this, I need to know how I should fix this practically.

推荐答案

要从技术上回答此问题，根据手册，这两个函数都需要传递db连接并作为第一个参数:

To technically answer this, both of these functions require a db connection be passed and as the first parameter, as per the manuals:

• http://php.net/manual/en/mysqli.query.php
• http://php.net/manual/en/mysqli .real-escape-string.php

• http://php.net/manual/en/mysqli.query.php
• http://php.net/manual/en/mysqli.real-escape-string.php

然后在注释中指出您正在使用PDO进行连接.

Then in comments you state that you are using PDO to connect with.

那些不同的MySQL API不会相互混合.从连接到查询，您需要使用相同的内容.因此，如果要继续使用PDO连接，则需要使用PDO函数而不是使用mysqli_*进行查询.

Those different MySQL APIs do not intermix. You need to use the same one from connecting to querying. Therefore, if you want to continue to use a PDO connection, you will need to use the PDO functions to query with and not mysqli_*.

• 从手册开始: http://php.net/manual/zh/book.pdo.php 都在那里.

• Start with the manual: http://php.net/manual/en/book.pdo.php it's all in there.

对于PDO准备的语句:

And for PDO prepared statements:

• http://php.net/pdo.prepared-statements

还要检查错误:

• http://php.net/manual/en/pdo.error -handling.php (PDO)
• http://php.net/manual/en/function.error -reporting.php (PHP)

• http://php.net/manual/en/pdo.error-handling.php (PDO)
• http://php.net/manual/en/function.error-reporting.php (PHP)

密码

我还注意到您打算存储密码MD5.不建议使用此方法，因为它不再被视为安全的密码存储功能.

I also noticed that you are attemtpting to store passwords MD5. This is not recommended as it is no longer considered safe to use as a password storing function.

• 如果您打算与此直播， 不要.

使用以下之一:

• CRYPT_BLOWFISH
• crypt()
• bcrypt()
• scrypt()
• > 在OPENWALL上
• > PBKDF2
• PHP.net上的PBKDF2
• PHP 5.5的 password_hash() 函数.
• 兼容性包(如果PHP< 5.5) https://github.com/ircmaxell/password_compat/

• CRYPT_BLOWFISH
• crypt()
• bcrypt()
• scrypt()
• On OPENWALL
• PBKDF2
• PBKDF2 on PHP.net
• PHP 5.5's password_hash() function.
• Compatibility pack (if PHP < 5.5) https://github.com/ircmaxell/password_compat/

其他链接:

• PBKDF2 for PHP

有关列长的重要旁注:

如果并且当您决定使用password_hash()或crypt时，请务必注意，如果当前密码列的长度小于60，则需要将其更改为该长度(或更大).手册建议长度为255.

If and when you do decide to use password_hash() or crypt, it is important to note that if your present password column's length is anything lower than 60, it will need to be changed to that (or higher). The manual suggests a length of 255.

您将需要更改列的长度，并以新的哈希值重新开始，以使其生效.否则，MySQL将静默失败.

You will need to ALTER your column's length and start over with a new hash in order for it to take effect. Otherwise, MySQL will fail silently.

我也说过:

if (isset($_SESSION['user']) != "")将给您一个假阳性.

语法为:if isset AND equals to，而不是if isset equals to，这就是目前的解释.

The syntax is: if isset AND equals to, and not if isset equals to which is what it is presently being interpreted as.

使用:

if (isset($_SESSION['user']) && $_SESSION['user'] != "")

关于您的POST阵列.

In regards to your POST arrays.

确保您使用的HTML表单确实使用POST方法，并且所有元素都具有各自的名称属性.

Make sure the HTML form you are using does use a POST method and that all elements hold their respective name attributes.

即:<input type="text" name="fullname">等

请注意，name="fullname"和name="FullName"是两种不同的动物.

Note that name="fullname" and name="FullName" are two different animals.

• 区分大小写.

还建议在每个标头后添加exit;，否则您的代码可能要继续执行.

It is also suggested to add exit; after each header, otherwise your code may want to continue to execute.

header("Location: index.html");
exit;

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