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WordPress fix Site DOwn after 4.9.2 Upgrade

Discussion in 'Misc WordPress Requests' started by mjb566, Jan 17, 2018.

  1. mjb566

    Guest

    Site DOwn after 4.9.2 Upgrade, by mjb566

    Hi,
    4.9.2 auto-installed last night and broke my site. I have managed to get it working by replacing wp-db.php with the version from 4.9.1

    If I re-install wp-db.php from 4.9.2 the site breaks with the error message Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /web1/user/website/wp-includes/wp-db.php on line 1657

    The line referred (1657) to matches line 1664 in ver 4.9.1 but otherwise is the same in both versions.

    Any ideas why the wp-db.php file from 4.9.2 is breaking the site whilst 4.9.1 doesn’t?
    Thanks

    Site DOwn after 4.9.2 Upgrade
     
    #1

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