index.md

PHPZxing - Wrapper for Zxing Java Library

PHPZxing is a small php wrapper that uses the Zxing library to Create and read Barcodes. Under the hood it still uses the Zxing library to encode and decode data.

Install using composer

{  
    "require": {
        "dsiddharth2/php-zxing": "1.0.3"
    }  
}

Note

• Only Decoder is programmed right now. Needs programming of Encoder.
• The Default location of java that is configured is /usr/bin/java

Changes in version 1.0.3

• Functionality added for possible_formats to work

Changes in version 1.0.2

• Updated the new jars and tested on windows system

Changes in version 1.0.1

• Added a isFound function that will tell if the bar code is found.
• If the image has one bar code detected, then it returns the object instead of array of a single object.

Basic Usage

use PHPZxing\PHPZxingDecoder;

$decoder        = new PHPZxingDecoder();
$data           = $decoder->decode('../images/Code128Barcode.jpg');
if($data->isFound()) {
    $data->getImageValue();
    $data->getFormat();
    $data->getType();        
}

The Decoded data is an Array of Objects of PHPZxing\ZxingImage if the bar code is found. If not found then it is an array of Objects PHPZxing\ZxingBarNotFound.

Checking for existence of Barcode

The Existance of bar code can be found using the functoin isFound()

use PHPZxing\PHPZxingDecoder;

$decoder        = new PHPZxingDecoder();
$data           = $decoder->decode('../images/Code128Barcode.jpg');
if($data->isFound()) {
    $data->getImageValue();
    $data->getFormat();
    $data->getType();        
}

You can also check using the instanceof object,

use PHPZxing\PHPZxingDecoder;

$decoder        = new PHPZxingDecoder();
$data           = $decoder->decode('../images/Code128Barcode.jpg');
if($data instanceof PHPZxing\ZxingImage) {
    $data->getImageValue();
    $data->getFormat();
    $data->getType();
}

The Public methods that we can use in PHPZxing\ZxingImage are,

Method Name	Function
getImageValue	Get the value decoded in the image passed
getFormat	Get the format of the image that is encoded, example : CODE_39
getType	Get the type of the image decoded, example : URL, TEXT etc
getImagePath	Get Path of the image

The Public methods that we can use in PHPZxing\ZxingImage are,

Method Name	Function
getImageErrorCode	Get the error code for the image not found
getErrorMessage	Error Message
getImagePath	Get Path of the image

Setting the configurations

use PHPZxing\PHPZxingDecoder;

$config = array(
    'try_harder'            => true,
);
$decoder        = new PHPZxingDecoder($config);
$decodedArray   = $decoder->decode('../images');
if(is_array($decodedArray)){
    foreach ($decodedArray as $data) {
        if($data->isFound()) {
            print_r($data);
        }
    }
}

You can also use it with configurations. The Decoder has 4 configurations,

Config Name	Function
try_harder	If the image has bar/Qr code at unknown locations, then use this non mobile mode.
multiple_bar_codes	If the image has multiple bar codes you want to read.
crop	Crop the image and it will read only the cropped portion
possible_formats	List of formats to decode, where format is any value in BarcodeFormat

More Examples

You can pass array of images too,

use PHPZxing\PHPZxingDecoder;

$decoder        = new PHPZxingDecoder();
$imageArrays = array(
    '../images/Code128Barcode.jpg',
    '../images/Code39Barcode.jpg'
);
$decodedArray  = $decoder->decode($imageArrays);
foreach ($decodedArray as $data) {
    if($data instanceof PHPZxing\ZxingImage) {
        print_r($data);
    } else {
        echo "Bar Code cannot be read";
    }
}

Reading multiple bar codes,

use PHPZxing\PHPZxingDecoder;

$config = array(
    'try_harder' => true,
    'multiple_bar_codes' => true
);
$decoder        = new PHPZxingDecoder($config);
$decodedData    = $decoder->decode('../images/multiple_bar_codes.jpg');
print_r($decodedData);

Set Java Path

If your java PATH is not set properly, the decoder will not work. You need to set path of java variable.

use PHPZxing\PHPZxingDecoder;

$decoder        = new PHPZxingDecoder();
$decoder->setJavaPath('/your/path/to/java');
$decodedData    = $decoder->decode('../images/Code128Barcode.jpg');
print_r($decodedData);

Where is my java located ?

If you do not know the path to java, then you can use the following on *nix enviromnents

$ which java

On Windows environment,

> where java

For more info, on Windows read the follwoing stackoverflow Link

Acknowledgments

• Zxing library

Contibution

Please Contribute or suggest changes.