phpdftk API Documentation

PdfVersion : string

in package

• phpdftk

PDF specification versions — ISO 32000-1 (1.x) and ISO 32000-2 (2.0).

Table of Contents

Cases

V1_0  = '1.0'

V1_1  = '1.1'

V1_2  = '1.2'

V1_3  = '1.3'

Introduced digital signatures and interactive forms.

V1_4  = '1.4'

Introduced transparency, JBIG2, and encryption revision 3.

V1_5  = '1.5'

Introduced cross-reference streams and object streams.

V1_6  = '1.6'

Introduced AES-128 encryption and OpenType font embedding.

V1_7  = '1.7'

Final Acrobat-era version — the default for most new PDFs.

V2_0  = '2.0'

ISO 32000-2 — AES-256, tagged PDF improvements, deprecations.

Methods

fromString()  : self|null

Parse a version string like '1.7' into an enum case, or null.

isAtLeast()  : bool

isGreaterThan()  : bool

max()  : self

Return the higher of two versions.