我尝试使用 php 登录，但收到此错误：Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given,我做错了什么？
注册.php
<!doctype html>
<html lang"fi">
<head>
<link rel="icon" type='image/png' href='images/logo.png'>
<title>
asd
</title>
<link href="css/styles.css" type="text/css" rel="stylesheet">
</head>
<body>
<!--reg alkaa-->
<form action="register.php" method="post">
<p><input type="text" name="username" placeholder="Username">
<p><input type="email" name="email" placeholder="Email">
<p><input type="password" name="pass" placeholder="Password">
<p><input type="password" name="pass1" placeholder="Password">
<p><input type="submit" name="submit" value="Register">
</form>
<?php
if(isset($_POST['submit']))
{
$username = mysqli_real_escape_string($_POST['username']);
$pass = mysqli_real_escape_string($_POST['pass']);
$pass1 = mysqli_real_escape_string($_POST['pass1']);
$email = mysqli_real_escape_string($_POST['email']);
if($username && $pass && $pass1 && $email)
{
if($pass==$pass1)
{
$connect = mysql_connect("mysql.example.com","username","password");
mysql_select_db("my_database");
$query = mysql_query("INSERT INTO users VALUES('$username','$pass','$email');");
echo "You have been registered.";
}
else
{
echo "Password must match.";
}
}
else
{
echo "All fields are required.";
}
}
?>
<!--reg end-->
<Center>
<a href="index.php">
<h1>
asd
</h1>
</center>
<div id="main">
<h3>
<div class="menu"> <a href="index.php">Etusivu</a> •
<a </div>
</h3>
</div>
<div class="jonne">
</div>
<script src="javascript/jquery.js"></script>
</body>
</html>
我使用 000webhost，这是我第一次在线使用 mysql 数据库。
你正在混合mysqli and mysql功能。
如果您使用的是 mysql 函数，则改为mysqli_real_escape_string($your_variable); use
$username = mysql_real_escape_string($_POST['username']);
$pass = mysql_real_escape_string($_POST['pass']);
$pass1 = mysql_real_escape_string($_POST['pass1']);
$email = mysql_real_escape_string($_POST['email']);
如果您使用 mysqli_* 函数，那么您必须将与数据库的连接包含到mysqli_real_escape 函数 http://php.net/manual/en/mysqli.real-escape-string.php :
$username = mysqli_real_escape_string($your_connection, $_POST['username']);
$pass = mysqli_real_escape_string($your_connection, $_POST['pass']);
$pass1 = mysqli_real_escape_string($your_connection, $_POST['pass1']);
$email = mysqli_real_escape_string($your_connection, $_POST['email']);
注意：由于 mysql 已被弃用，因此请使用 mysqli_* 函数。欲了解信息，请阅读mysqli_ http://php.net/manual/en/book.mysqli.php
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