IM上的登录工作制/注册到我的网站 我这个小问题,即应用程序犯规reconize如果用户已经registred,或者如果它不是注册检测registred用户PHP的
<?php
// including $conn the connextion between database and the app from the dbh.php
include '../dbh.php';
$first = $_POST['first'];
$last = $_POST['last'];
$userid = $_POST['userid'];
$email = $_POST['email'];
$pwd = $_POST['pwd'];
$sql = "SELECT * from user WHERE userid=".$userid;
$results = mysqli_query($conn , $sql);
$useridcheck = $results->num_rows;
//if there is a registred username in the database same as $userid
if($useridcheck > 0)
{
header('location: ../signupform.php?error=username');
exit();
}
// there is no match to $userid in the database so go ahaid and register this new user
else{
$sql ="INSERT INTO user(first,last,userid,email,pwd)
VALUES('$first','$last','$userid','$email','$pwd')";
$results = mysqli_query($conn , $sql);
header('location: ../index.php');
}
问题出在if ($useridcheck > 0)
当运营商设置为= 1
它运行第一个块,如果它设置为> 0
它运行第二个块。我不知道什么是问题,但我猜测它必须与变量$useridcheck = $results->num_rows
'$ useridcheck = mysqli_num_rows($ results);'并检查 –
@Anant为什么? '$ results-> num_rows;'是有效的。好吧,它是面向过程的混合对象,但它仍然有效。 –
其他的东西导致你的代码中断,你需要检查错误的原因。 –