mongodb php-driver : php startup error

Question

I installed mongodb php-driver as per the guideline shown here:
https://github.com/mongodb/mongo-php-driver

But when I run #php command its showing following error :

Warning: PHP Startup: Unable to load dynamic library
'/opt/lampp/lib/php/extensions/no-debug-non-zts-20151012/mongodb.so' - 
/opt/lampp/lib/php/extensions/no-debug-non-zts-20151012/mongodb.so: symbol 
CRYPTO_get_locking_callback, version OPENSSL_1.0.0 not defined in file 
libcrypto.so.1.0.0 with link time reference in Unknown on line 0

I am using :

Lampp Stack
PHP : 7.0.0 
OS: Ubuntu 15.10
Pear: 1.10.1

Please suggest any solution if you have. Thanks in advance .

Answer 1

It looks like you don't have SSL library enabled/installed correctly on your system. Most likely, I am thinking you don't have the libssl-dev package installed.

You should install this with apt-get install libssl-dev libsasl2-dev, and then reinstall the mongodb extension with pecl uninstall mongodb && pecl install mongodb.