PHP Fatal error: Uncaught FFI\Exception: Failed loading scope 'blas'

[sneakyimp]

I have attempted to run the sample PHP script in your README file and it encounters a fatal error:

PHP Fatal error: Uncaught FFI\Exception: Failed loading scope 'blas' in /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php:28
Stack trace:
#0 /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php(28): FFI::scope('blas')
#1 /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php(73): Np\core\blas::init()
#2 /Users/sneakyimp/np/vendor/ghostjat/np/src/linAlgb/linAlg.php(45): Np\core\blas::gemm(Object(Np\matrix), Object(Np\matrix), Object(Np\matrix))
#3 /Users/sneakyimp/np/vendor/ghostjat/np/src/linAlgb/linAlg.php(30): Np\matrix->dotMatrix(Object(Np\matrix))
#4 /Users/sneakyimp/np/foo.php(8): Np\matrix->dot(Object(Np\matrix))
#5 {main}
thrown in /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php on line 28

Fatal error: Uncaught FFI\Exception: Failed loading scope 'blas' in /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php:28
Stack trace:
#0 /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php(28): FFI::scope('blas')
#1 /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php(73): Np\core\blas::init()
#2 /Users/sneakyimp/np/vendor/ghostjat/np/src/linAlgb/linAlg.php(45): Np\core\blas::gemm(Object(Np\matrix), Object(Np\matrix), Object(Np\matrix))
#3 /Users/sneakyimp/np/vendor/ghostjat/np/src/linAlgb/linAlg.php(30): Np\matrix->dotMatrix(Object(Np\matrix))
#4 /Users/sneakyimp/np/foo.php(8): Np\matrix->dot(Object(Np\matrix))
#5 {main}
thrown in /Users/sneakyimp/np/vendor/ghostjat/np/src/core/blas.php on line 28

I have the FFI extension loaded in PHP. The FFI documentation is sorely incomplete so I'm not at all sure what this scope() call is supposed to do. The docs mention a #define statement, which you appear to have in blas.h:

#define FFI_SCOPE "blas"

EDIT: I'm running this script in PHP 8.1 on MacOs. I have the FFI extension loaded, and brew shows openblas and lapack are installed.

I have also confirmed the error with PHP 8.1 on Ubuntu 20.04 LTS.

[ghostjat]

Hi, @sneakyimp
you have to update php.ini
with following settings
zend_extension=opcache.so
opcache.enable_cli = 1
ffi.enable=preload
opcache.preload=preload.php