title: PHP 7: Redis extenstion doesn't load (PHP Startup: Unable to load dynamic library)
body: <p>Recently, I've upgraded PHP to version 7.0.4. After that I tried to re-install Redis client (PHP Redis) by following steps similar to these <a href="https://anton.logvinenko.name/en/blog/how-to-install-redis-and-redis-php-client.html" rel="nofollow">instructions</a>.</p>
  
  <p>However, when I run PHP I get the following error:</p>
  
  <pre><code>$ php -v
  PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/redis.so' - /usr/lib/php/20151012/redis.so: undefined symbol: zval_used_for_init in Unknown on line 0
  PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/redis.so' - /usr/lib/php/20151012/redis.so: undefined symbol: zval_used_for_init in Unknown on line 0
  </code></pre>
  
  <p>Does anyone have an idea how to solve this?</p>