我是一个 php 新手。在创建本地托管网站时,我偶然发现了两个奇怪的错误 这是代码:`
<?php
function check_login($con){
if(isset($_SESSION['user_id'])){
$id = $_SESSION['user_id'];
$query="select * from user_login where user-id='$id' limit 1 ";
$result= mysqli_query($con,$query);
if($result && mysqli_num_rows($result)>0){
$user_data = mysqli_fetch_assoc($result);
return $user_data;
}
}
//redirect to login
header("Location: login.php");
die;
}
function random_num($length){
$final_num=""
if($length<10){
$length=10;
}
$num=rand(10,$length);
for($i=0;$i<$num;$i++){
$final_num.=rand(0,9);
}
return $final_num;
}