[wp-trac] [WordPress Trac] #52001: PHP Fatal error: Uncaught Error: Call to undefined function mysql_connect() (was: WP 5.6 and PHP8 > PHP Fatal error: Uncaught Error: Call to undefined function)

[WordPress Trac]

#52001: PHP Fatal error: Uncaught Error: Call to undefined function mysql_connect()
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 Reporter:  ipajen        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  closed
 Priority:  normal        |   Milestone:
Component:  Database      |     Version:  5.6
 Severity:  blocker       |  Resolution:  invalid
 Keywords:                |     Focuses:
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Changes (by hellofromTonya):

 * status:  new => closed
 * resolution:   => invalid
 * milestone:  Awaiting Review =>


Comment:

 Hello @ipajen,

 Welcome to Trac!

 I'm sorry you are experiencing issues with WordPress 5.6.

 The `mysql_connect()` function was deprecated in PHP 5.5 and removed in
 7.0.0 [https://www.php.net/manual/en/function.mysql-connect.php see the
 PHP documentation].

 Since 3.9, WordPress uses `mysqli` on PHP 5.5 or later instead of the
 deprecated mysql extension. See this post for more context:
 [https://make.wordpress.org/core/2014/04/07/mysql-in-wordpress-3-9/ MySQL
 in WordPress 3.9].

 In #51988 related ticket, Sergey makes the following suggestion:
 >I would suggest checking that the `mysqli` extension is available and the
 `WP_USE_EXT_MYSQL` constant is not defined in `wp-config.php`.

 I'm closing this ticket as this issue is not due to WordPress core
 software.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52001#comment:1>
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