所以...我收到这个错误“警告：mysqli_query（）期望参数1是mysqli，在”但是只有在尝试从另一个页面访问函数时才会给出null。如果我将变量放在同一个PHP文件中并在同一个文件中调用该函数，那么它就可以工作了。
这是调用函数“mylogin（）”
的文件的PHP<?php
require_once "mysqlconn.php";
require_once "login.php";
$key = md5('mykey');
$salt = md5('mysalt');
function encrypt($string, $key){
$string = rtrim(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $string, MCRYPT_MODE_ECB)));
return $string;
}
function decrypt($string, $key){
$string = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($string), MCRYPT_MODE_ECB));
return $string;
}
function hashword($string, $salt){
$string = crypt($string, '$1%' . $salt . '$');
return $string;
};
if(isset($_POST['submit'])){
$firstname = encrypt($_POST['firstname'],$key);
$lastname = encrypt($_POST['lastname'],$key);
$username = encrypt($_POST['username'],$key);
$password = hashword($_POST['password'],$salt);
$passwordconf = hashword($_POST['passconf'],$salt);
$email = encrypt($_POST['email'],$key);
if(username == NULL){
$msg = 'Please Enter a UserName';
echo $msg;
}else{
if($password == NULL){
$msg = 'Please Enter a Password';
echo $msg;
}else{
if($passwordconf <> $password){
$msg = 'Please Ensure Your Password Matches';
echo $msg;
}else{
if($email == NULL){
$msg = 'Please Enter a valid Email address';
echo $msg;
} else{
$sql = "insert into Users(uname,fname, lname, pw, eml) Values ('".$username."','".$firstname."','".$lastname."','".$password."','".$email."')";
mysqli_query($link,$sql);
$res = mylogin($username,$password);
echo $res;
}
}
}
}
}
?>
这引用了login.php文件
<?php
//$username = 'username';
//$password = 'password';
//$rest = mylogin($username,$password);
//echo $rest;
function mylogin($username,$password){
require_once "mysqlconn.php";
$sqllogin = "select ID from Users where UserName = '" .$username. "' and Password = '" .$password. "'";
$res = mysqli_query($link,$sqllogin) or die(mysqli_error($link));
while ($row = $res->fetch_assoc()){
$ID = $row['ID'];
}
if ($ID == NULL){
$ID = "Username or Password Incorrect";
}
return $ID;
}
?>
建议？