How to download and setup php-qrcode
Open terminal and run command
                                            git clone https://github.com/chillerlan/php-qrcode.git
                                        
                                        git clone is used to create a copy or clone of php-qrcode repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with php-qrcode https://github.com/chillerlan/php-qrcode/archive/master.zip
Or simply clone php-qrcode with SSH
                                            [email protected]:chillerlan/php-qrcode.git                                    
                                    If you have some problems with php-qrcode
You may open issue on php-qrcode support forum (system) here: https://github.com/chillerlan/php-qrcode/issuesSimilar to php-qrcode repositories
Here you may see php-qrcode alternatives and analogs
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