code-128.md

Code 128

Kind	Charset	Capacity	URL	Phone
1D linear	7-bit ASCII	Unbounded*	Yes	Yes

Dense linear barcode over the full 7-bit ASCII range. Automatically picks code sets to keep numeric runs compact, and always appends its own checksum.

Example

Code128::create('CODE-128')->render();

Usage

use Atelier\Barcode\Code128;

echo Code128::create('SHIP-4417-XZ')
    ->scale(2)
    ->height(80)
    ->withText(false)
    ->foreground('#08090c')
    ->background('#f4f0e8')
    ->render();

Options

Method	Default	Description
scale(int)	2	pixels per module
height(int)	80	bar height in pixels
margin(int)	10	quiet zone, in modules
foreground(string)	#000000	bar color
background(string)	#ffffff	background color
withText(bool)	true	show the human-readable value under the bars

modules() returns the raw bar pattern instead of SVG.

Fourteen digits in a narrower symbol than the twelve-character value above. Code set C packs two digits per symbol, and the encoder switches to it on its own.

Limits

• Any byte above 127 throws InvalidCodeException (Code 128 supports 7-bit ASCII only).
• Empty data throws.
• No maximum length enforced by this library; very long data produces a wide barcode.

Unbounded = no hard cap in this implementation; physical/print width is the real constraint.

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