Problem while upgrading from PHP 5 to PHP 7.4

  • I upgraded my PHP from 5.5 to 7.4 and since then I have been locked out because of the error of the site not being able to locate mysqli.so file in my new installation. I have commented it out in my php.ini fiel as it is deprecated but I still found out that my site is not opening.
    I enabled the WP_DEBUG and below is the error it is displaying on the site now

    Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /…/…/public_html/wp-includes/wp-db.php:1658

    Stack trace:
    #0 /…/…/public_html/wp-includes/wp-db.php(631): wpdb->db_connect()
    #1 /…/…/public_html/wp-includes/load.php(426): wpdb->__construct(‘##hidden##’, ‘##hidden##’, ‘##hidden##’, ‘localhost’)
    #2 /…/…/public_html/wp-siettings.php(126): require_wp_db()
    #3 /…/…/public_html/wp-config.php(113): require_once(‘/…/…’)
    #4 /…/…/public_html/wp-load.php(37): require_once(‘/…/……’)
    #5 /…/…/public_html/wp-blog-header.php(13): require_once(‘/…/…..’)
    #6 /…/…/public_html/index.php(17): require(‘/…/…..’)
    #7 {main} thrown in /…/…/public_html/wp-includes/wp-db.php on line 1658

    What do I do?

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  • Switch it back to how it was.
    Then update WordPress and the plugins and themes to versions that can use the newer PHP. You can use the PHP Compatibility Checker plugin to scan.
    The WP version 5.2 was the first one that raised the minimum PHP version to 5.6.20.

Viewing 1 replies (of 1 total)
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