Clarence questions

Clarence answers

• if variable twig on symfony
• Get first character of a string, that is a French accent [duplicate]
• Excluding a specific URL from Varnish cache
• How to read output of varnishtop?
• mysql_fetch_array returns duplicate data
• Are ESI blocking or non-blocking?
• What is the use of MongoDB in GrayLog2?
• Inserting NULL into NOT NULL columns with Default Value
• Vagrant + Symfony2 Environment ContextErrorException Weirdness
• Problems with the namespace autoloading in composer