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WordPress functionality is broken in Plesk after changing domain PHP version to 8.0: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array,

Leonid Gukhman

Updated January 12, 2021 11:24

Plesk for Linux kb: bug ext: wptk ABT: Group B

Applicable to:

Plesk for Linux

Symptoms

PHP 8.0 is selected for the domain.
Cannot install WordPress via WordPress Toolkit or log in to WordPress:

CONFIG_TEXT: PHP Fatal error: Uncaught TypeError:
implode(): Argument #2 ($array) must be of type ?array, string given in /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php:75
WordPress instance in Plesk may be marked as broken.

Cause

Side effect of known product issue EXTWPTOOLK-2040.

Resolution

Until the issue is fixed - switch PHP handler to the version lower than 8.0, as a workaround.

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