in_array(): Argument #2 ($haystack) must be of type array, string given

Resolved alantygel2
(@alantygel2)

2 months, 3 weeks ago
Hi,

I use mainwp dashboard in several websites, but a few of them are broken after the latest updates.

Particularly, I’m getting the following error when saving a Post:

{“code”:”internal_server_error”,”message”:”
H\u00e1 um erro cr\u00edtico no seu site.<\/p>
Saiba mais sobre a como resolver problemas do WordPress.<\/a><\/p>”,”data”:{“status”:500,”error”:{“type”:1,”message”:”Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in \/home\/socialor\/public_html\/wp-content\/plugins\/mainwp-child\/modules\/changes-logs\/classes\/class-changes-handle-wp-content.php:128\nStack trace:\n#0 \/home\/socialor\/public_html\/wp-content\/plugins\/mainwp-child\/modules\/changes-logs\/classes\/class-changes-handle-wp-content.php(128): in_array()\n#1 \/home\/socialor\/public_html\/wp-includes\/class-wp-hook.php(341): MainWP\Child\Changes\Changes_Handle_WP_Content::change_before_post_edit_data()\n#2 \/home\/socialor\/public_html\/wp-includes\/class-wp-hook.php(365): WP_Hook->apply_filters()\n#3 \/home\/socialor\/public_html\/wp-includes\/plugin.php(522): WP_Hook->do_action()\n#4 \/home\/socialor\/public_html\/wp-includes\/post.php(4901): do_action()\n#5 \/home\/socialor\/public_html\/wp-includes\/post.php(5296): wp_insert_post()\n#6 \/home\/socialor\/public_html\/wp-includes\/rest-api\/endpoints\/class-wp-rest-posts-controller.php(977): wp_update_post()\n#7 \/home\/socialor\/public_html\/wp-includes\/rest-api\/class-wp-rest-server.php(1292): WP_REST_Posts_Controller->update_item()\n#8 \/home\/socialor\/public_html\/wp-includes\/rest-api\/class-wp-rest-server.php(1125): WP_REST_Server->respond_to_request()\n#9 \/home\/socialor\/public_html\/wp-includes\/rest-api\/class-wp-rest-server.php(439): WP_REST_Server->dispatch()\n#10 \/home\/socialor\/public_html\/wp-includes\/rest-api.php(467): WP_REST_Server->serve_request()\n#11 \/home\/socialor\/public_html\/wp-includes\/class-wp-hook.php(341): rest_api_loaded()\n#12 \/home\/socialor\/public_html\/wp-includes\/class-wp-hook.php(365): WP_Hook->apply_filters()\n#13 \/home\/socialor\/public_html\/wp-includes\/plugin.php(570): WP_Hook->do_action()\n#14 \/home\/socialor\/public_html\/wp-includes\/class-wp.php(418): do_action_ref_array()\n#15 \/home\/socialor\/public_html\/wp-includes\/class-wp.php(821): WP->parse_request()\n#16 \/home\/socialor\/public_html\/wp-includes\/functions.php(1343): WP->main()\n#17 \/home\/socialor\/public_html\/wp-blog-header.php(16): wp()\n#18 \/home\/socialor\/public_html\/index.php(17): require(‘\/home\/socialor\/…’)\n#19 {main}\n thrown”,”file”:”\/home\/socialor\/public_html\/wp-content\/plugins\/mainwp-child\/modules\/changes-logs\/classes\/class-changes-handle-wp-content.php”,”line”:128}},”additional_errors”:[]}

I’m using the latest version of WordPress and Php8.3.

MainWP Report:

Configuração do servidor Valor obrigatório Valor Status

MAINWP CHILD
MainWP Child Versão 6.0.2 6.0.2 Pass
WordPress
WordPress Version >=3.4 6.9.2 Pass
WordPress Memory Limit >=64M 40M Warning
MultiSite Disabled =true true Pass
Método FileSystem = direct direct Pass
CONFIGURAÇÕES DO PHP
PHP Version >=7.4 8.4.18 Pass
Modo de segurança do PHP desativado OFF
PHP Max Execution Time >=30 seconds 300 Pass
PHP Max Input Time >=30 seconds 180 Pass
PHP Memory Limit >=128M (256M+ best for big backups) 1G Pass
PCRE Backtracking Limit >=10000 4194304 Pass
PHP Upload Max Filesize >=2M (2MB+ best for upload of big plugins) 1G Pass
PHP Post Max Size >=2M (2MB+ best for upload of big plugins) 1G Pass
SSL Extension Enabled =true true Pass
SSL Warnings = empty Pass
cURL Extension Enabled =true true Pass
cURL Timeout >=300 seconds 60 Warning
cURL Version >=7.18.1 8.14.1 Pass
cURL SSL Version >=OpenSSL/1.1.0 OpenSSL/1.1.1wPass
OpenSSL Working Status Yes Yes Pass
CONFIGURAÇÕES DO MySQL
MySQL Version >=5.0 10.11.16-MariaDB-cll-lvePass
INFORMAÇÕES DO ARQUIVO DE BACKUP
ZipArchive enabled in PHP =true true Pass
Tar GZip supported =true true Pass
Tar BZip2 supported =true true Pass
INFORMAÇÕES DO SERVIDOR
Diretório raiz do WordPress /home/socialor/public_html/
Nome do Servidor social.org.br
Software do Servidor LiteSpeed
Sistema Operacional Linux
Arquitetura 64 bit
IP do Servidor 177.73.233.52
Protocolo do Servidor HTTP/1.1
Servidor HTTP social.org.br
HTTPS Ligado – on
Conexão automática do servidor Corpo da resposta HTTP não esperado:
Agente de usuário Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:148.0) Gecko/20100101 Firefox/148.0
Porta do servidor 443
Interface de Gateway
Uso de memória 14.31 MB
URL Completa https://social.org.br/wp-admin/plugins.php?plugin_status=all&paged=1&s
Request Time 1773166931
Aceitar Conteúdo text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
Conteúdo Accept-Charset N/D
Atualmente executando o caminho do roteiro /home/socialor/public_html/wp-admin/options-general.php
URL da página atual /wp-admin/options-general.php?page=mainwp_child_tab
Endereço Remoto 201.148.188.227
Servidor Remoto N/A
Porta Remota 39727
INFORMAÇÕES SOBRE PHP
PHP permite URL fopen Ligado
PHP: Suporte a Exif SIM ( V8.4.)
PHP: Suporte a IPTC SIM
PHP: Suporte a XML SIM
Funções Desabilitadas PHP dl, escapeshellarg, escapeshellcmd, exec, expect_popen, passthru, pcntl_exec, popen, posix_getpwuid, posix_kill, posix_mkfifo, posix_setegid, posix_seteuid, posix_setgid, posix_setpgid, posix_setsid, posix_setuid, posix_uname, proc_close, proc_open, shell_exec, show_source, system,
Extensões PHP Carregadas Core, PDO, PDO_ODBC, Phar, Reflection, SPL, SimpleXML, Zend OPcache, bcmath, bz2, calendar, ctype, curl, date, dba, dom, enchant, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, imagick, imap, intl, ionCube Loader, json, ldap, libxml, litespeed, mbstring, mysqli, mysqlnd, odbc, openssl, pcntl, pcre, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, posix, pspell, random, readline, session, shmop, snmp, soap, sockets, sodium, sqlite3, standard, sysvmsg, sysvsem, sysvshm, tidy, timezonedb, tokenizer, xml, xmlreader, xmlwriter, xsl, zip, zlib
INFORMAÇÃO DO MySQL
Modo do MySQL ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
Codificação do Cliente MySQL utf8
PLUGINS do WordPress
Advanced Custom Fields 6.7.1 Ativo
Akismet Anti-spam: Spam Protection 5.6 Ativo
Blocksy Companion (Premium) 2.1.34 Ativo
Getwid 2.1.3 Ativo
MainWP Child 6.0.2 Ativo
Post Types Order 2.4.3 Ativo
Query Monitor 3.20.2 Inativo
UpdraftPlus – Backup/Restore 1.26.2 Ativo
W3 Total Cache 2.9.2 Ativo
WP Mail SMTP 4.7.1 Ativo
Yoast SEO 27.1.1 Ativo Próxima data Cronograma Gancho

10 de março de 2026 15:08 Every minute action_scheduler_run_queue
10 de março de 2026 15:21 [W3TC] Page Cache file GC (every 3600 seconds) w3_pgcache_cleanup
10 de março de 2026 15:40 A cada hora wp_privacy_delete_old_export_files
10 de março de 2026 18:34 Uma vez por dia updraft_backup
10 de março de 2026 18:34 Uma vez por dia updraft_backup_database
10 de março de 2026 21:07 Duas vezes por dia updraftplus_clean_temporary_files
10 de março de 2026 22:41 Duas vezes por dia wp_update_user_counts
10 de março de 2026 22:48 Uma vez por dia fs_data_sync_blocksy-companion
11 de março de 2026 00:10 Duas vezes por dia wp_update_plugins
11 de março de 2026 00:40 Duas vezes por dia wp_update_themes
11 de março de 2026 06:52 Uma vez por dia wpseo-reindex
11 de março de 2026 06:52 Uma vez por dia wpseo_permalink_structure_check
11 de março de 2026 06:52 Uma vez por dia wpseo_detect_default_seo_data
11 de março de 2026 10:40 Uma vez por dia recovery_mode_clean_expired_keys
11 de março de 2026 10:41 Uma vez por dia wp_scheduled_delete
11 de março de 2026 10:41 Uma vez por dia delete_expired_transients
11 de março de 2026 10:41 Uma vez por dia wp_scheduled_auto_draft_delete
12 de março de 2026 10:59 Duas vezes por dia wp_version_check
16 de março de 2026 10:41 Uma vez por semana wp_delete_temp_updater_backups
17 de março de 2026 07:02 Uma vez por semana acf_update_site_health_data
17 de março de 2026 10:40 Uma vez por semana wp_site_health_scheduled_check Tempo Erro
```
                               thrown in /home/socialor/public_html/wp-content/plugins/mainwp-child/modules/changes-logs/classes/class-changes-handle-wp-content.php on line 128
                               #8 {main}                                              
                               #7 /home/socialor/public_html/wp-admin/revision.php(71): wp_restore_post_revision()
                               #6 /home/socialor/public_html/wp-includes/revision.php(486): wp_update_post()
                               #5 /home/socialor/public_html/wp-includes/post.php(5296): wp_insert_post()
                               #4 /home/socialor/public_html/wp-includes/post.php(4901): do_action()
                               #3 /home/socialor/public_html/wp-includes/plugin.php(522): WP_Hook->do_action()
                               #2 /home/socialor/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
                               #1 /home/socialor/public_html/wp-includes/class-wp-hook.php(341): MainWP\Child\Changes\Changes_Handle_WP_Content::change_before_post_edit_data()
```

Viewing 2 replies - 1 through 2 (of 2 total)

Plugin Support Bojan Katusic
(@bojankatusic)

2 months, 3 weeks ago

Hey @alantygel2

I was unable to reproduce this issue when saving a post on Child Sites. And we haven’t received other reports for this, so it appears to be an isolated issue.

Please open a private Help Desk ticket and we will gladly look into this: https://mainwp.com/my-account/get-support/
Thread Starter alantygel2
(@alantygel2)

2 months, 3 weeks ago
I solved the issue.

The websites were I has having this issue were sites migrated from Joomla, with a lot of sticky posts. In order to clear these sticky posts, I just cleared the wp_options “sticky_posts” entry.

MainWP Child was expecting this to be an array, and thats why the error raised.

In short:
- Disable MainWP Child
- Set a post as sticky post
- Unset the post as sticky
- Activate MainWP Child
Then the entry will again be recovered as an array.

Viewing 2 replies - 1 through 2 (of 2 total)

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