SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)



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<b>Notice</b>:  Undefined variable: db in <b>/home/u1409658/public_html/header.php</b> on line <b>96</b><br />
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<b>Fatal error</b>:  Uncaught Error: Call to a member function prepare() on null in /home/u1409658/public_html/header.php:96
Stack trace:
#0 /home/u1409658/public_html/blog-detay.php(1): include()
#1 {main}
  thrown in <b>/home/u1409658/public_html/header.php</b> on line <b>96</b><br />