[wp-trac] [WordPress Trac] #51988: Call to undefined function mysql_connect() (was: wordpress 5.6 not ok with php 8)

[WordPress Trac]

#51988: Call to undefined function mysql_connect()
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 Reporter:  bgin          |       Owner:  (none)
     Type:  defect (bug)  |      Status:  closed
 Priority:  normal        |   Milestone:
Component:  Database      |     Version:  5.6
 Severity:  normal        |  Resolution:  invalid
 Keywords:                |     Focuses:
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Comment (by SergeyBiryukov):

 Just to clarify a bit more, since version 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].

 I would suggest checking that the `mysqli` extension is available and the
 `WP_USE_EXT_MYSQL` constant is **not** defined in `wp-config.php`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51988#comment:2>
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