PHP Extension with bindings for bitcoin/secp256k1.

v0.2.2 2019-02-26 18:56 UTC


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PHP bindings for

Please note that the upstream library, libsecp256k1 is still considered experimental by it's authors, and has not yet been formally released. For this reason, it's use should be discouraged. For consensus systems this warning is critical.

The library supports the EcDH, and signature recovery modules - these libraries are required for installation.


PHP 5.* versions are supported in the v0.0.x release. PHP 7 is supported in the v0.1.x series.

About the extension

  • Fully unit tested, with >99 code coverage since the v0.1.3 release.
  • This extension only supports deterministic signatures at present. In fact, no RNG is utilized in this extension - private keys must be generated elsewhere.
  • The extension exposes the same raw API of libsecp256k1. As such, you must ensure you are passing the binary representations of each value.
  • In keeping with libsecp256k1, this extension returns certain data to the user by writing to a variable reference, and returning a code indicating the failure/success.

To Install:


    git clone && \
    cd secp256k1 &&                                    \
    ./ &&                                    \
    ./configure --enable-experimental --enable-module-{ecdh,recovery} && \
     make &&                                           \
     sudo make install &&                              \
     cd ../


    git clone && \
    cd secp256k1-php/secp256k1 &&                      \
    phpize &&                                          \ 
    ./configure --with-secp256k1 &&                    \  
    make && sudo make install &&                       \
    cd ../../


See the examples folder, or the *_basic.phpt files in the test suite

(Optional) - Enable extension by default!

If you're a heavy user, you can add this line to your php.ini files for php-cli, apache2, or php-fpm.

/etc/php/7.0/cli/conf.d/20-secp256k1.ini -> /etc/php/7.0/mods-available/secp256k1.ini

Run Tests

(Commands issued from secp256k1-php directory)

Basic tests:

cd secp256k1-php/secp256k1 && make test