Zend\Barcode

Barcode creation using Zend\Barcode\Barcode class

Using Zend\Barcode\Barcode::factory

Zend\Barcode\Barcode uses a factory method to create an instance of a renderer that extends Zend\Barcode\Renderer\AbstractRenderer. The factory method accepts five arguments.

  • The name of the barcode format (e.g., “code39”) or a Traversable object (required)
  • The name of the renderer (e.g., “image”) (required)
  • Options to pass to the barcode object (an array or a Traversable object) (optional)
  • Options to pass to the renderer object (an array or a Traversable object) (optional)
  • Boolean to indicate whether or not to automatically render errors. If an exception occurs, the provided barcode object will be replaced with an Error representation (optional default TRUE)

Getting a Renderer with Zend\Barcode\Barcode::factory()

Zend\Barcode\Barcode::factory() instantiates barcode classes and renderers and ties them together. In this first example, we will use the Code39 barcode type together with the Image renderer.

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use Zend\Barcode\Barcode;

// Only the text to draw is required
$barcodeOptions = array('text' => 'ZEND-FRAMEWORK');

// No required options
$rendererOptions = array();
$renderer = Barcode::factory(
    'code39', 'image', $barcodeOptions, $rendererOptions
);

Using Zend\Barcode\Barcode::factory() with Zend\Config\Config objects

You may pass a Zend\Config\Config object to the factory in order to create the necessary objects. The following example is functionally equivalent to the previous.

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use Zend\Config\Config;
use Zend\Barcode\Barcode;

// Using only one Zend\Config\Config object
$config = new Config(array(
    'barcode'        => 'code39',
    'barcodeParams'  => array('text' => 'ZEND-FRAMEWORK'),
    'renderer'       => 'image',
    'rendererParams' => array('imageType' => 'gif'),
));

$renderer = Barcode::factory($config);

Drawing a barcode

When you draw the barcode, you retrieve the resource in which the barcode is drawn. To draw a barcode, you can call the draw() of the renderer, or simply use the proxy method provided by Zend\Barcode\Barcode.

Drawing a barcode with the renderer object

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use Zend\Barcode\Barcode;

// Only the text to draw is required
$barcodeOptions = array('text' => 'ZEND-FRAMEWORK');

// No required options
$rendererOptions = array();

// Draw the barcode in a new image,
$imageResource = Barcode::factory(
    'code39', 'image', $barcodeOptions, $rendererOptions
)->draw();

Drawing a barcode with Zend\Barcode\Barcode::draw()

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use Zend\Barcode\Barcode;

// Only the text to draw is required
$barcodeOptions = array('text' => 'ZEND-FRAMEWORK');

// No required options
$rendererOptions = array();

// Draw the barcode in a new image,
$imageResource = Barcode::draw(
    'code39', 'image', $barcodeOptions, $rendererOptions
);

Rendering a barcode

When you render a barcode, you draw the barcode, you send the headers and you send the resource (e.g. to a browser). To render a barcode, you can call the render() method of the renderer or simply use the proxy method provided by Zend\Barcode\Barcode.

Rendering a barcode with the renderer object

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use Zend\Barcode\Barcode;

// Only the text to draw is required
$barcodeOptions = array('text' => 'ZEND-FRAMEWORK');

// No required options
$rendererOptions = array();

// Draw the barcode in a new image,
// send the headers and the image
Barcode::factory(
    'code39', 'image', $barcodeOptions, $rendererOptions
)->render();

This will generate this barcode:

/images/manual/zend.barcode.introduction.example-1.png

Rendering a barcode with Zend\Barcode\Barcode::render()

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use Zend\Barcode\Barcode;

// Only the text to draw is required
$barcodeOptions = array('text' => 'ZEND-FRAMEWORK');

// No required options
$rendererOptions = array();

// Draw the barcode in a new image,
// send the headers and the image
Barcode::render(
    'code39', 'image', $barcodeOptions, $rendererOptions
);

This will generate the same barcode as the previous example.

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