/usr/local/php/bin/phpize

extension = /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/yar.so

Yar_Server {
 protected $_executor ;
 final public __construct ( Object $obj )
 public handle ( void ) : boolean
 }

# wget https://pecl.php.net/get/yar-1.2.3.tgz
# tar -xf yar-1.2.3.tgz 
# cd yar-1.2.3
# ls
config.m4  LICENSE  tests    yar.c     yar_exception.c yar_packager.h yar_request.c  yar_response.h yar_transport.c
config.w32 packagers tools    yar_client.c yar_exception.h yar_protocol.c yar_request.h  yar_server.c  yar_transport.h
CREDITS   php_yar.h transports yar_client.h yar_packager.c  yar_protocol.h yar_response.c yar_server.h
# ls /usr/local/php/php7/bin/
pear peardev pecl phar phar.phar php php-cgi php-config phpdbg phpize
# /usr/local/php/php7/bin/phpize
Configuring for:
PHP Api Version:     20170718
Zend Module Api No:   20170718
Zend Extension Api No:  320170718
# ./configure --with-php-config=/usr/local/php/php7/bin/php-config
# make && make install
................
............
Installing shared extensions:   /usr/local/php/php7/lib/php/extensions/no-debug-non-zts-20170718/

# ls /usr/local/php/php7/lib/php/extensions/no-debug-non-zts-20170718/
mongodb.so opcache.a opcache.so openssl.so pcntl.so phalcon.so redis.so swoole.so xhprof.so yaf.so yar.so zlib.so