[hossein@hossein-manjaro test]$ php -m

[PHP Modules]

bcmath

Core

ctype

curl

date

dom

exif

fileinfo

filter

gd

gettext

hash

json

libxml

mbstring

mysqlnd

openssl

pcntl

pcre

PDO

pdo_mysql

Phar

posix

readline

Reflection

session

SimpleXML

soap

SPL

standard

tokenizer

xml

xmlreader

xmlwriter

zip

zlib

[Zend Modules]

وای من رفتم توی php.ini از کامنت خارج کردم ولی یادم نبود ریستارت کنم

مرسی محمحد جان

سلام محمدجان مشکلم حل نشد همون خطایی قبل رو دارم

$mysqli = new \\mysqli("localhost", "root","", "world");
if ($mysqli->connect_errno) {
    echo "Failed to Connect to Mysql. Error: " .$mysqli->connect_error;
    exit;
}
# connection is ok 
echo "Successfully Connected to mysql!";

نشد

بله

 [hossein@hossein-manjaro ~]$ php -v
PHP 8.1.4 (cli) (built: Mar 16 2022 11:32:47) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.4, Copyright (c) Zend Technologies
[hossein@hossein-manjaro ~]$ which php
/usr/bin/php
[hossein@hossein-manjaro ~]$