如何解决这个错误。我无法解决这个问题 [英] How to solve this error. Iam not able to solve this

问题描述

致命错误：未捕获错误：在C：\ xampp \\\ htdocs \ project：\\ r.pp中调用未定义函数mysql_connect（）：2堆栈跟踪：＃0 {main}抛出C：\ xampp第2行\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

<？php

mysqli_connect（localhost，root，）;

mysqli_select_db（sign_up_form）;

$ username = $ _ POST [用户名];

$ email = $ _ POST [email];

$ mobile = $ _ POST [mobile];

$ comment = $ _ POST [comment];

$ gender = $ _ POST [gender];

$ sql = mysqli_query（INSERT INTO contact_form（用户名，电子邮件，手机，评论，性别）

值（'$ username'，'$ email'，'$ mobile'，'$ comment '，'$ gender'））;

echo

感谢您提供详细信息

;

？>

解决方案

username =

_POST [username];

电子邮件=

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in C:\xampp\htdocs\project\r.php:2 Stack trace: #0 {main} thrown in C:\xampp\htdocs\project\r.php on line 2

What I have tried:

<?php
mysqli_connect("localhost","root","");
mysqli_select_db("sign_up_form");
$username=$_POST["username"];
$email=$_POST["email"];
$mobile=$_POST["mobile"];
$comment=$_POST["comment"];
$gender=$_POST["gender"];
$sql = mysqli_query("INSERT INTO contact_form(username,email,mobile,comment,gender)
values('$username','$email','$mobile','$comment','$gender')");
echo "

Thank you for giving your details

";
?>

解决方案

username=

_POST["username"];

email=

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