I have a problem to connect MySQLi

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Content preview:  Dear, I have installed Apache 2.4 on windows, also PHP 8.3.2,
   every thing is going well except connection with MySQLi. My code as follow
   

Content analysis details:   (5.1 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 0.0 URIBL_BLOCKED          ADMINISTRATOR NOTICE: The query to URIBL was
                            blocked.  See
                            http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                             for more information.
                            [URIs: php.net]
 0.0 DKIM_ADSP_CUSTOM_MED   No valid author signature, adsp_override is
                             CUSTOM_MED
 1.1 DATE_IN_PAST_03_06     Date: is 3 to 6 hours before Received: date
 0.0 FREEMAIL_FROM          Sender email is commonly abused enduser mail
                            provider (ahmedhelmy72[at]gmail.com)
 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                            mail domains are different
 0.0 HTML_MESSAGE           BODY: HTML included in message
 2.4 DEAR_NOBODY            RAW: Message contains Dear but with no name
 0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                            valid
 0.0 T_DKIM_INVALID         DKIM-Signature header exists but is not valid
 0.0 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and
                            EnvelopeFrom freemail headers are
                            different
 1.2 NML_ADSP_CUSTOM_MED    ADSP custom_med hit, and not from a mailing
                            list

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