Unsupported operand types: string + int

[sven794]

Describe the Bug

Hi Team,

When migrating the database I get error Unsupported operand types: string + int.
The error comes from DatabaseMigrationRepository.php line 144

Running PHP 8.3

It is running on a hosting server. There are no changes done to the code.

Not sure if this is a bug or its the system. Upgrades worked in the past.

Steps to Reproduce

1. php artisan migrate

Expected Behaviour

To complete the migrate without any errors

Screenshots or Additional Context

[2026-02-13 16:26:07] production.ERROR: Unsupported operand types: string + int {"exception":"[object] (TypeError(code: 0): Unsupported operand types: string + int at /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Migrations/DatabaseMigrationRepository.php:144)
[stacktrace]
#0 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php(197): Illuminate\Database\Migrations\DatabaseMigrationRepository->getNextBatchNumber()
#1 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php(138): Illuminate\Database\Migrations\Migrator->runPending()
#2 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/MigrateCommand.php(116): Illuminate\Database\Migrations\Migrator->run()
#3 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php(669): Illuminate\Database\Console\Migrations\MigrateCommand->Illuminate\Database\Console\Migrations\{closure}()
#4 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/MigrateCommand.php(109): Illuminate\Database\Migrations\Migrator->usingConnection()
#5 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/MigrateCommand.php(88): Illuminate\Database\Console\Migrations\MigrateCommand->runMigrations()
#6 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(36): Illuminate\Database\Console\Migrations\MigrateCommand->handle()
#7 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Container/Util.php(43): Illuminate\Container\BoundMethod::Illuminate\Container\{closure}()
#8 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(96): Illuminate\Container\Util::unwrapIfClosure()
#9 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(35): Illuminate\Container\BoundMethod::callBoundMethod()
#10 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Container/Container.php(799): Illuminate\Container\BoundMethod::call()
#11 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Console/Command.php(211): Illuminate\Container\Container->call()
#12 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/symfony/console/Command/Command.php(341): Illuminate\Console\Command->execute()
#13 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Console/Command.php(180): Symfony\Component\Console\Command\Command->run()
#14 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/symfony/console/Application.php(1102): Illuminate\Console\Command->run()
#15 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/symfony/console/Application.php(356): Symfony\Component\Console\Application->doRunCommand()
#16 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/symfony/console/Application.php(195): Symfony\Component\Console\Application->doRun()
#17 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(198): Symfony\Component\Console\Application->run()
#18 /home/fitsz/domains/bookstack.fitsz.nl/bookstack/artisan(35): Illuminate\Foundation\Console\Kernel->handle()
#19 {main}
"}

Browser Details

Microsoft Edge

Exact BookStack Version

v25.12.3

[ssddanbrown]

Hi @sven794,
Can you detail your hosting environment? like, if known, that operating system is this using? What version of MySQL/MariaDB are you using? If on a unix-like system, what's the output of php -i | grep mysql?

This feels like the kind of error coming from the database driver/extension not handling types correctly, which I think I've only seen when old mysql extension types (non-native driver) were used.

[sven794]

Hi @ssddanbrown

Thanks for your reply.

It's a direct admin system. Not sure what version because I can't get to that info.
The SQL version 11.4.9-MariaDB-cll-lve.

Here the output of php -i.

php -i | grep mysql
Configure Command => './configure' '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/opt/alt/php82' '--exec-prefix=/opt/alt/php82' '--bindir=/opt/alt/php82/usr/bin' '--sbindir=/opt/alt/php82/usr/sbin' '--sysconfdir=/opt/alt/php82/etc' '--datadir=/opt/alt/php82/usr/share' '--includedir=/opt/alt/php82/usr/include' '--libdir=/opt/alt/php82/usr/lib64' '--libexecdir=/opt/alt/php82/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/usr/com' '--mandir=/opt/alt/php82/usr/share/man' '--infodir=/opt/alt/php82/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file-path=/opt/alt/php82/etc' '--with-config-file-scan-dir=/opt/alt/php82/link/conf' '--disable-debug' '--enable-calendar' '--enable-exif' '--enable-ftp' '--enable-huge-code-pages' '--enable-jit' '--enable-shared=yes' '--enable-shmop' '--enable-static=no' '--enable-xml' '--with-bz2' '--with-freetype=/usr' '--with-gettext' '--with-gmp=shared' '--with-gnu-ld=yes' '--with-iconv' '--with-jpeg=/usr' '--with-layout=GNU' '--with-mhash' '--with-password-argon2=/usr' '--with-pcre-jit' '--with-pic' '--with-readline' '--with-webp=/opt/alt/libwebp' '--with-xpm=/usr' '--with-zlib' '--with-zlib-dir=/usr' '--without-gdbm' '--without-pear' '--with-curl=/opt/alt/curlssl30/usr' '--with-openssl-dir=/usr' '--with-openssl=/usr' '--with-pcre-dir=/usr' '--with-avif' '--with-kerberos' '--with-apxs2' '--enable-litespeed' '--enable-fpm' '--with-fpm-systemd' '--enable-bcmath=shared' '--enable-dba=shared' '--with-db4=/usr' '--enable-dom=shared' '--enable-fileinfo=shared' '--enable-gd=shared' '--enable-intl=shared' '--enable-json=shared' '--enable-mbregex' '--enable-mbstring=shared' '--enable-mysqlnd=shared' '--enable-opcache' '--enable-pcntl' '--enable-pdo=shared' '--enable-phar=shared' '--enable-posix=shared' '--enable-soap=shared' '--enable-sockets=shared' '--enable-sysvsem=shared' '--enable-sysvshm=shared' '--enable-sysvmsg=shared' '--enable-xmlreader=shared' '--enable-xmlwriter=shared' '--with-enchant=shared,/usr' '--with-external-gd' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--with-mysqli=shared,mysqlnd' '--with-pdo-mysql=shared,mysqlnd' '--with-pdo-odbc=shared,unixODBC,/usr' '--with-pdo-sqlite=shared,/opt/alt/sqlite/usr' '--with-pspell=shared' '--with-sqlite3=/opt/alt/sqlite/usr' '--with-tidy=shared,/usr' '--with-unixODBC=shared,/usr' '--with-zip=shared' '--with-pdo-pgsql=shared,/usr' '--with-pgsql=shared,/usr' '--with-imap=shared,/usr' '--with-imap-ssl=/usr' '--with-ldap=shared,/usr' '--with-ldap-sasl' '--with-snmp=shared,/usr' '--with-pdo-dblib=shared,/usr' '--with-pdo-oci=shared,instantclient,/usr/lib/oracle/21/client64/lib' '--with-sodium=shared,/usr' '--with-ffi=shared,/usr' '--with-pdo-firebird=shared' '--with-xsl=shared,/usr' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'target_alias=x86_64-redhat-linux-gnu' 'PKG_CONFIG=/usr/bin/pkg-config' 'PKG_CONFIG_PATH=/opt/alt/curlssl30/usr/lib64/pkgconfig:/opt/alt/sqlite/usr/lib64/pkgconfig:/opt/alt/libxml2/usr/lib64/pkgconfig:/opt/alt/libicu71/usr/lib64/pkgconfig:/opt/alt/libgd/lib64/pkgconfig::/usr/lib64/pkgconfig:/usr/share/pkgconfig' 'CFLAGS=-O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -Dmp_bitcnt_t=long -fno-strict-aliasing -Wno-pointer-sign -mshstk -fcf-protection -I/opt/alt/libssh211/usr/include' 'CXXFLAGS=-O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' 'KERBEROS_CFLAGS=-I/usr/include' 'KERBEROS_LIBS=-L/usr/lib64' 'WEBP_LIBS=-L/opt/alt/libwebp/lib64 -Wl,-rpath=/opt/alt/libwebp/lib64' 'SASL_CFLAGS=-I/usr/include' 'SASL_LIBS=-L/usr/lib64' 'LT_SYS_LIBRARY_PATH=/usr/lib64:'
mysqli
Client API library version => mysqlnd 8.2.30
Client API header version => mysqlnd 8.2.30
MYSQLI_SOCKET => /var/lib/mysql/mysql.sock
mysqli.allow_local_infile => Off => Off
mysqli.allow_persistent => On => On
mysqli.default_host => no value => no value
mysqli.default_port => 3306 => 3306
mysqli.default_pw => no value => no value
mysqli.default_socket => /var/lib/mysql/mysql.sock => /var/lib/mysql/mysql.sock
mysqli.default_user => no value => no value
mysqli.local_infile_directory => no value => no value
mysqli.max_links => Unlimited => Unlimited
mysqli.max_persistent => Unlimited => Unlimited
mysqli.rollback_on_cached_plink => Off => Off
mysqlnd
mysqlnd => enabled
Version => mysqlnd 8.2.30
Loaded plugins => mysqlnd,debug_trace,auth_plugin_mysql_native_password,auth_plugin_mysql_clear_password,auth_plugin_caching_sha2_password,auth_plugin_sha256_password
API Extensions => mysqli
PDO drivers => mysql, sqlite
pdo_mysql
pdo_mysql.default_socket => /var/lib/mysql/mysql.sock => /var/lib/mysql/mysql.sock

The output shows PHP8.2, but I'm pretty sure the subdomain should run on version 8.3.
If you can confirm it's a driver issue I'll contact the provider.