thinkphp5 + barcode method to generate barcode

1. Go to the official website to download the class library "https://www.barcodebakery.com/en/download", select your own version to download

Recommended tutorial:thinkphp tutorial

2. Unzip and place it under "E:\phpstudy\PHPTutorial\WWW\guahao\vendor\", where the class file is all the class files, and the barcode is generated by calling the folder In the classes, the font file is the font, index.php is a function to generate barcodes with optional conditions, and is the entrance to the main program. test_1D.php is an example of generating barcodes, and test_1D.html is the corresponding page for rendering barcodes

3. We can directly use the official example (test_1D.php), copy it to where we need to use it, and then make slight changes according to our needs. Note that the path to load the third-party class library needs to be changed.

PHP code to generate barcode

<?php
namespace app\index\controller;
use think\Controller;
/**
* 条形码操作类
*/
class Barcode extends Controller
{
    public function createBarcode()
    {
        $class_dir = VENDOR_PATH.&#39;barcode/class/&#39;;
        // Including all required classes
        require_once($class_dir.&#39;BCGFontFile.php&#39;);
        require_once($class_dir.&#39;BCGColor.php&#39;);
        require_once($class_dir.&#39;BCGDrawing.php&#39;);
        require_once($class_dir.&#39;BCGcode39.barcode.php&#39;);
        // Loading Font
        // 注意font和class是同一级文件夹
        $font = new \BCGFontFile(VENDOR_PATH.&#39;barcode/font/Arial.ttf&#39;, 18);// The arguments are R, G, B for color.
        $color_black = new \BCGColor(0, 0, 0);
        $color_white = new \BCGColor(255, 255, 255);
        $drawException = null;
        try {
            $code = new \BCGcode39();
            $code->setScale(2); // Resolution
            $code->setThickness(30); // Thickness
            $code->setForegroundColor($color_black); // Color of bars
            $code->setBackgroundColor($color_white); // Color of spaces
            $code->setFont($font); // Font (or 0)  0不显示文字
　　　　　    $text = isset($_GET[&#39;text&#39;]) ? $_GET[&#39;text&#39;] : &#39;HELLO&#39;;
            $code->parse($text); // Text
        } catch(Exception $exception) {
            $drawException = $exception;
        }
        /* Here is the list of the arguments
        1 - Filename (empty : display on screen)
        2 - Background color */
        $drawing = new \BCGDrawing(&#39;&#39;, $color_white);
        if($drawException) {
            $drawing->drawException($drawException);
        } else {
            $drawing->setBarcode($code);
            $drawing->draw();
        }
        // Header that says it is an image (remove it if you save the barcode to a file)
        header(&#39;Content-Type: image/png&#39;);
        header(&#39;Content-Disposition: inline; filename="barcode.png"&#39;);
        // Draw (or save) the image into PNG format.
        $drawing->finish(\BCGDrawing::IMG_FORMAT_PNG);
    }
    public function barcodedes()
    {
        return $this->fetch();
    }
}
?>

Accept Html code to render barcode

<img  src="{:url(&#39;createBarcode&#39;)}" alt="thinkphp5 + barcode method to generate barcode" >

Of course, src is also Parameters can be carried, just change the following code

html code

<img  src="{:url(&#39;createBarcode&#39;,array(&#39;text&#39;= alt="thinkphp5 + barcode method to generate barcode" >&#39;123&#39;))}">

php code

change

$text = isset($_GET['text']) ? $_GET['text'] : 'HELLO';

to

$text = input('text');      //接收的参数

4 . If you want to save the barcode locally, just fill in the save path when instantiating "BCGDrawing"

// 文件路径
        $file_dir = 'uploads/barcode/'.date('Y-m-d');
        if (!file_exists($file_dir)) {
            mkdir($file_dir,0755,true);
        }
        $imgUrl = $file_dir.'/'.time().'.png';
        $class_dir = VENDOR_PATH.'barcode/class/';
        // Including all required classes
        require_once($class_dir.'BCGFontFile.php');
        require_once($class_dir.'BCGColor.php');
        require_once($class_dir.'BCGDrawing.php');
        require_once($class_dir.'BCGcode39.barcode.php');
        // Loading Font
        // 注意font和class是同一级文件夹
        $font = new \BCGFontFile(VENDOR_PATH.'barcode/font/Arial.ttf', 18);
        // Don't forget to sanitize user inputs
        // $text = isset($_GET['text']) ? $_GET['text'] : 'HELLO';
        // The arguments are R, G, B for color.
        $color_black = new \BCGColor(0, 0, 0);
        $color_white = new \BCGColor(255, 255, 255);
        $drawException = null;
        try {
            $code = new \BCGcode39();
            $code->setScale(2); // Resolution
            $code->setThickness(30); // Thickness
            $code->setForegroundColor($color_black); // Color of bars
            $code->setBackgroundColor($color_white); // Color of spaces
            $code->setFont($font); // Font (or 0)
            $text = input('text');      //接收的参数
            $text = isset($text) ? $text :'无参数';      
            $code->parse($text); // Text
        } catch(Exception $exception) {
            $drawException = $exception;
        }
        /* Here is the list of the arguments
        1 - Filename (empty : display on screen)
        2 - Background color */
        // 保存到本地 （路径，颜色）路径为空则表示显示到页面上
        $drawing = new \BCGDrawing($imgUrl, $color_white);
        if($drawException) {
            $drawing->drawException($drawException);
        } else {
            $drawing->setBarcode($code);
            $drawing->draw();
        }
        $drawing->finish(\BCGDrawing::IMG_FORMAT_PNG);

5. After generating the barcode, how to determine whether the barcode can be used? You can save the barcode as an image locally, open the official website "https://www.onlinebarcodereader.com/", and upload the just-generated barcode. If the parsed parameters are the same as what you entered, it means the barcode can be used.

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