pcsc/README.md

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# PC/SC for PHP
## About
This is the only extension for using [PC/SC](http://www.pcscworkgroup.com/) based smart cards with [PHP](http://www.php.net). It is a wrapper to the wonderful and free project by Ludovic Rousseau, [PCSC-Lite](https://pcsclite.apdu.fr/), which is the middleware to access a smart card using SCard API (PC/SC). Since PCSC-Lite is compatible to the winscard API it should be possible to compile this extension using a Windows or macOS operating system.
Thanks are going to Johann Dantant! He provided a PC/SC extension for PHP since 2005 and I reused some of his code. He allowed me to relicense these parts under the terms of the PHP license so I could integrate PCSC-Lite native into PHP.
## Installation
I recommend to install the PECL extension the "PHP" way:
```
pecl install pcsc-beta
```
You can install the latest code by downloading the sources and compile yourself too.
```
git clone https://github.com/pcsc-for-php/pcsc.git
cd pcsc
phpize
./configure
make
make install
```
After that you have all needed files in ./modules/ .
## API
The extension currently provides the following API:
### scard_establish_context();
Returns the application $context to the PC/SC resource manager.
### scard_is_valid_context($context);
Returns TRUE if $context is valid or FALSE if $context is not valid.
### scard_release_context($context);
Releases the application $context.
### scard_list_readers($context);
Returns an array of available readers or FALSE.
#### Example:
```
array(3) {
[0]=>
string(26) "OMNIKEY CardMan 5x21 00 00"
[1]=>
string(26) "OMNIKEY CardMan 5x21 00 01"
[2]=>
string(76) "SCL01x Contactless Reader [SCL01x Contactless Reader] (21161009200722) 00 00"
}
```
### scard_connect($context, "OMNIKEY CardMan 5x21 00 00");
Connects to a card. Returns the $connection to a reader or FALSE.
### scard_reconnect($connection);
Returns the $connection to a reader or FALSE.
### scard_disconnect($connection);
Disconnects the $connection to a card. Returns the TRUE if disconnecting was succesful or FALSE.
### scard_transmit($connection, $apdu);
Returns the response $apdu as string or FALSE.
### scard_status($connection);
Returns the status or FALSE.
### scard_cancel($context);
## License
This code is licensed under the terms of the PHP License version 3.01. PCSC-Lite is licensed in a way where it is possible to integrate it native in the PHP environment.
## Links
* [PECL Project Page](http://pecl.php.net/package/pcsc) - Page for package download at PHP.net
* [PC/SC Worgroup](http://www.pcscworkgroup.com/) - Homepage and definition file downloads
* [PC/SC](http://en.wikipedia.org/wiki/PC/SC) - PC/SC at Wikipedia
* [PC/SC-Lite](https://pcsclite.apdu.fr/) - The free and open implementation of the PC/SC SCard API for UNIX
* [PCSC sample in PHP5](http://ludovicrousseau.blogspot.de/2015/01/pcsc-sample-in-php5.html) - Ludovic Rousseau about "PC/SC for PHP"