• Output to PNG, GIF, JPEG, or SVG.
• Generates UPC-A, UPC-E, EAN-13, EAN-8, Code 39, Code 93, Code 128, GS1 128, Codabar, ITF, QR Code, GS1 QR Code, DataMatrix and GS1 DataMatrix.

use Cis\Barcode\Barcode;
use Cis\Barcode\BarcodeType\Code39;
use Cis\Barcode\Exceptions\CreateImageException;
use Cis\Barcode\Render\ImageRender;
use Cis\Barcode\Render\SvgRender;
use Cis\Barcode\Symbology;

$barcode = new Barcode(new Code39());
$svgRender = new SvgRender($barcode);
$imageRender = new ImageRender($barcode);

/* Define necessary Options */
$options = [];

/* Generate PNG for Barcode and save it to File */
try {
    $imageRender->render(Symbology::EAN_13, '9780201376548', $options)->toPng('/tmp/9780201376548_barcode.png');
} catch (CreateImageException $e) {
    echo $e->getMessage();
}

/* Retrieve the data directly and send it as output */
try {
    $imageData = $imageRender->render(Symbology::CODE_128, '9780201376548', $options)->toJpeg();
    header('Content-Type: image/jpeg');
    echo $imageData;
} catch (CreateImageException $e) {
    echo $e->getMessage();
}

/* Generate SVG and write it to output */
$svg = $svgRender->render(Symbology::QR, 'Simple Encode QR-Data', $options);
echo $svg;

/* Generate SVG and write it to a file */
$svg = $svgRender->render(Symbology::QR, 'Simple Encode QR-Data', $options);
file_put_contents('/tmp/barcode.svg', $svg);

For UPC or EAN, use * for missing digit. For Codabar, use ABCD or ENT* for start and stop characters. For QR, encode in Shift-JIS for kanji mode.

Add this data as key/value pair into the options-Array.

w - Width of image. Overrides sf or sx.

h - Height of image. Overrides sf or sy.

sf - Scale factor. Default is 1 for linear barcodes or 4 for matrix barcodes.

sx - Horizontal scale factor. Overrides sf.

sy - Vertical scale factor. Overrides sf.

p - Padding. Default is 10 for linear barcodes or 0 for matrix barcodes.

pv - Top and bottom padding. Default is value of p.

ph - Left and right padding. Default is value of p.

pt - Top padding. Default is value of pv.

pl - Left padding. Default is value of ph.

pr - Right padding. Default is value of ph.

pb - Bottom padding. Default is value of pv.

bc - Background color in #RRGGBB format.

cs - Color of spaces in #RRGGBB format.

cm - Color of modules in #RRGGBB format.

tc - Text color in #RRGGBB format. Applies to linear barcodes only.

tf - Text font for SVG output. Default is monospace. Applies to linear barcodes only.

ts - Text size. For SVG output, this is in points and the default is 10. For PNG, GIF, or JPEG output, this is the GD library built-in font number from 1 to 5 and the default is 1. Applies to linear barcodes only.

th - Distance from text baseline to bottom of modules. Default is 10. Applies to linear barcodes only.

ms - Module shape. One of: s for square, r for round, or x for X-shaped. Default is s. Applies to matrix barcodes only.

md - Module density. A number between 0 and 1. Default is 1. Applies to matrix barcodes only.

wq - Width of quiet area units. Default is 1. Use 0 to suppress quiet area.

wm - Width of narrow modules and spaces. Default is 1.

ww - Width of wide modules and spaces. Applies to Code 39, Codabar, and ITF only. Default is 3.

wn - Width of narrow space between characters. Applies to Code 39 and Codabar only. Default is 1.

\FNC1

• used in Data as a part of the data string.
• when used, it is replaced with a Group separator <GS> ASCII char 29 in encoded data string.
• it should be used to terminate variable length GS1 Application Identifiers in GS1 128 and GS1 DataMatrix barcodes.
• available in barcode symbology:

    EAN_128     GS1_DMTX_S    GS1_QR_L   GS1_QR_Q
    GS1_DMTX    GS1_DMTX_R    GS1_QR_M   GS1_QR_H

• Do not confuse this with <FNC1> character. Initially, it was intended to use the <FNC1> character as a separator character, but since according to this stackoverflow answer by Terry Burton, FNC1 is a non-data character that requires special treatment. And I don't want to fizzle around this when it is not necessary. Instead, I decided to use the <GS> character. According to the GS1 General Specifications, the <FNC1> and <GS> characters are in the role of a separator character substitutes. The \FNC1 remained as a keyword for its uniqueness. If you need, you can replace it with \GS or any other keyword you consider unique.