Trouble while installing

datlechin

ngoquocdat@Ngos-iMac-Pro flarum % php flarum info   

Deprecated: Return type of Flarum\Foundation\Config::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /Users/ngoquocdat/Documents/Code/flarum/vendor/flarum/core/src/Foundation/Config.php on line 61

Deprecated: Return type of Flarum\Foundation\Config::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /Users/ngoquocdat/Documents/Code/flarum/vendor/flarum/core/src/Foundation/Config.php on line 56

Deprecated: Return type of Flarum\Foundation\Config::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /Users/ngoquocdat/Documents/Code/flarum/vendor/flarum/core/src/Foundation/Config.php on line 66

Deprecated: Return type of Flarum\Foundation\Config::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /Users/ngoquocdat/Documents/Code/flarum/vendor/flarum/core/src/Foundation/Config.php on line 71
Flarum core 1.2.0
PHP version: 8.1.2
MySQL version: 8.0.28
Loaded extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bcmath, bz2, calendar, ctype, curl, dba, dom, hash, FFI, fileinfo, filter, ftp, gd, gettext, gmp, json, iconv, intl, SPL, ldap, mbstring, session, standard, odbc, pcntl, exif, mysqlnd, PDO, pdo_dblib, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, pspell, readline, Reflection, mysqli, shmop, SimpleXML, soap, sockets, sodium, sysvmsg, sysvsem, sysvshm, tidy, tokenizer, xml, xmlreader, xmlwriter, xsl, zip, Zend OPcache
+----------------------+---------+--------+
| Flarum Extensions    |         |        |
+----------------------+---------+--------+
| ID                   | Version | Commit |
+----------------------+---------+--------+
| flarum-approval      | v1.2.0  |        |
| flarum-bbcode        | v1.2.0  |        |
| flarum-emoji         | v1.2.0  |        |
| flarum-lang-english  | v1.2.0  |        |
| flarum-flags         | v1.2.0  |        |
| flarum-likes         | v1.2.0  |        |
| flarum-lock          | v1.2.0  |        |
| flarum-markdown      | v1.2.0  |        |
| flarum-mentions      | v1.2.0  |        |
| flarum-statistics    | v1.2.0  |        |
| flarum-sticky        | v1.2.0  |        |
| flarum-subscriptions | v1.2.0  |        |
| flarum-suspend       | v1.2.0  |        |
| flarum-tags          | v1.2.0  |        |
+----------------------+---------+--------+
Base URL: http://flarum.test
Installation path: /Users/ngoquocdat/Documents/Code/flarum

Deprecated: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in /Users/ngoquocdat/Documents/Code/flarum/vendor/flarum/core/src/Foundation/Console/InfoCommand.php on line 162
Queue driver: sync
Mail driver: mail
Debug mode: off

clarkwinkelmann

Those warnings are safe to ignore. You should edit php.ini to disable Deprecation warnings, or alternatively disable PHP error output completely.

The warnings themselves don't prevent Flarum from running, but because the PHP configuration writes the warnings in the page body, it breaks Flarum's ability to finish rendering the page.

If going back to PHP 8.0 is an option, you could also do that because I think all those warnings are due to changes in PHP 8.1