mohon dibantu masalah website saya menggunakan cms formulasi, muncul keterangan seperti ini...

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/smkaknus/public_html/konfigurasi/koneksi.php on line 35
 
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/smkaknus/public_html/konfigurasi/koneksi.php:35) in /home/smkaknus/public_html/kontenweb/tema.php(2) : eval()'d code(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 11
 
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/smkaknus/public_html/konfigurasi/koneksi.php:35) in /home/smkaknus/public_html/kontenweb/tema.php(2) : eval()'d code(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 11
 
Warning: Cannot modify header information - headers already sent by (output started at /home/smkaknus/public_html/konfigurasi/koneksi.php:35) in /home/smkaknus/public_html/kontenweb/tema.php(2) : eval()'d code(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 19
 
Warning: Cannot modify header information - headers already sent by (output started at /home/smkaknus/public_html/konfigurasi/koneksi.php:35) in /home/smkaknus/public_html/kontenweb/tema.php(2) : eval()'d code(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 20
 
Warning: Cannot modify header information - headers already sent by (output started at /home/smkaknus/public_html/konfigurasi/koneksi.php:35) in /home/smkaknus/public_html/kontenweb/tema.php(2) : eval()'d code(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 21
 
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dan saat login admin cms nya security image nya eror .. mohon dibantu fix nya