خطای Warning: mysqli_real_connect(): (HY000/2002)

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Warning: mysqli_real_connect(): (HY000/2002): No such file or directory in /home/perian/domains/persian.com/public_html/wp-includes/wp-db.php on line 1538

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/perian/domains/persian.com/public_html/wp-includes/wp-db.php on line 1568

Warning: mysql_connect(): No such file or directory in /home/perian/domains/persian.com/public_html/wp-includes/wp-db.php on line 1568

Fatal error: Call to undefined function get_bloginfo() in /home/perian/domains/persian.com/public_html/wp-includes/class-wp-locale.php on line 233