Tbl::class

Type-safe database schema constants para PHP

tbl-class generates immutable PHP entry-point classes that map your database schema
(tables, columns and relations) into compile-safe constants.

It provides a stable abstraction layer between your database and your application code, eliminating fragile string literals and runtime schema assumptions.

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Why tbl-class?

Database-driven PHP applications commonly rely on raw strings:

SELECT * FROM users WHERE created_at > ?

This approach is fragile:

• typos are silent
• refactors are risky
• schema changes break code at runtime
• no compile-time guarantees

tbl-class replaces string-based access with generated constants derived directly from the database schema:

Tbl::users                // users
Tbl::users__created_at    // created_at
Tbl::fk__posts__users     // user_id 
Tbl::on__contacts__users  // contacts.user_id = users.id

Your application code becomes schema-aware, explicit and refactor-safe.

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Installation

composer require eril/tbl-class --dev

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Usage

First run

tbl-class

On first execution, a configuration file is generated:

tblclass.yaml

Edit the file, configure your database connection, then run the command again.

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Generate schema constants

tbl-class

This command:

• connects to the database
• introspects the schema
• generates PHP constants according to your configuration

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Check for schema changes (CI-friendly)

tbl-class --check

This mode:

• does not generate files
• compares the current database schema with the last generated version
• exits with a non-zero status code if changes are detected

Designed for CI pipelines and deployment safety checks.

It's not meant to be checked overtime, but only

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Configuration

All configuration lives in tblclass.yaml.

A clean template is auto-generated on first run:

# Enable or disable generation
enabled: true       

# Optional: include a PHP file before execution
include: null

# ------------------------------------------------------------
# Database configuration
# ------------------------------------------------------------
database:

  # Optional custom connection resolver
  # Must return a PDO instance
  # Example: App\\Database::getConnection
  connection: null

  driver: mysql            # mysql | pgsql | sqlite

  # MySQL / PostgreSQL
  host: env(DB_HOST)       # default: localhost
  port: env(DB_PORT)       # default: 3306 | 5432
  name: env(DB_NAME)       # database name
  user: env(DB_USER)
  password: env(DB_PASS)

  # SQLite only
  # path: env(DB_PATH)

# ------------------------------------------------------------
# Output configuration
# ------------------------------------------------------------
output:

  # Output directory
  path: "./"

  # PHP namespace for generated classes
  namespace: ""

  # ⚠ IMPORTANT
  # This strategy defines ALL generated constant names.
  # Changing it later WILL rename constants and MAY break code.
  #
  # Strategies:
  # - full   → table, table__column, fk__table__references
  # - short  → table, tbl__column,   fk__table__references
  # - abbr   → table, tbl__column,   fk__tbl__ref
  # - alias  → table, t__column,     fk__t__r
  # - upper  → TABLE, TABLE__COLUMN, FK__TABLE__REFERENCES
  naming:
    strategy: full

📘 Full configuration reference: https://github.com/erilshackle/tbl-class-php/wiki/config

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Generated Output

Depending on the enabled generators, tbl-class produces PHP classes containing:

• table name constants
• column name constants
• foreign key references
• JOIN expressions derived from relations

Example usage:

Tbl::users                       // returns "users"
Tbl::users(u)                    // returns "users AS u"
Tbl::users__email                // returns "email"
Tbl::fk__users__roles            // returns "role_id" or whataver you named it in DB
Tbl::on__users__roles()          // returns "users.role_id = roles.id"
Tbl::on__users__roles('u', 'r')  // // returns "u.role_id = r.id"

All output is deterministic, static, and runtime-free.

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Autoloading

After generation, add one of the following to your composer.json.

PSR-4

"autoload": {
  "psr-4": {
    "Tbl\\": "path/to/Tbl/"
  }
}

Files

"autoload": {
  "files": [
    "path/to/Tbl.php"
  ]
}

Then run:

composer dump-autoload

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Documentation

All advanced topics, design decisions and future extensions are documented in the Wiki:

📚 Wiki

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What tbl-class is not

• ❌ Not an ORM
• ❌ Not a query builder
• ❌ Not a migration tool
• ❌ Not a runtime schema inspector

It is a compile-time schema contract for PHP applications.

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License

MIT © 2026 Eril TS Carvalho