Core Package Overview

Core · LGPL-3.0

The Core package (yeeefang/tcpdf-next) is the foundation of the TCPDF-Next ecosystem. It contains everything needed for PDF 2.0 document generation.

At a Glance

Metric	Value
PHP source files	148
Modules	16
Tests	908+
Assertions	28,881+
PHPStan level	8
Entry point	Document::create()
License	LGPL-3.0-or-later

Entry Point

All documents start with Document::create():

use Yeeefang\TcpdfNext\Core\Document;

$pdf = Document::create()
    ->setTitle('My Document')
    ->addPage()
    ->setFont('Helvetica', '', 12)
    ->cell(0, 10, 'Hello World')
    ->save('output.pdf');

The Document class is final and implements PdfDocumentInterface. Its functionality comes from 12 composable traits — see Design Philosophy for details.

Module Map

Module	Namespace	Files	Documentation
Core	Core\	6	Document
Contracts	Contracts\	7	API Reference
ValueObjects	ValueObjects\	5	Value Objects
Support	Support\	1	API Reference
Content	Content\	6	Text Output
Typography	Typography\	14	Typography, Fonts
Graphics	Graphics\	19	Colors, Graphics, Images
Layout	Layout\	6	Layout
Html	Html\	8	HTML Rendering
Form	Form\	5	Forms
Barcode	Barcode\	12	Barcodes
Navigation	Navigation\	11	Navigation
Accessibility	Accessibility\	3	Tagged PDF
Security	Security\	14	Encryption, Signatures
Writer	Writer\	8	Output

Capabilities

Text & Typography

Unicode, BiDi (bidirectional text), CJK, Arabic shaping, hyphenation. TTF/OTF/Type1/CFF font subsetting. 14 standard PDF fonts built-in.

Graphics

Shapes (line, rect, circle, ellipse, polygon, star, arrow, curve), gradients (linear, radial, Coons patch mesh, Gouraud triangle mesh), pattern fills, SVG/EPS parsing, image support (PNG, JPEG, WebP, AVIF).

HTML Rendering

Built-in HTML parser supporting div, p, h1-h6, table (colspan/rowspan), lists, inline styling. For full CSS3 (Flexbox, Grid, web fonts), use the Artisan package.

Barcodes

1D: Code 128, EAN-8/13, UPC-A/E, Code 39/93, GS1-128, IMB, and more. 2D: QR Code (ISO 18004), DataMatrix (ISO 16022), PDF417 (ISO 15438).

Security

AES-256 encryption (AESV3 Rev 6) with SASLprep. PAdES B-B digital signatures with visible/invisible appearance. RFC 3161 timestamp client.

Forms

AcroForm fields: text, checkbox, radio button, list box, combo box, button. Form flattening.

Navigation

Bookmarks, internal/external links, named destinations, annotations, table of contents, file attachments, JavaScript.

Output

Save to file, inline display, download, string buffer. Streaming output for large documents. Linearization for progressive web display. Deterministic mode for reproducible builds.