pecl install sqlsrv pdo_sqlsrv( configure or make error because of gcc version) make error core_conn.cpp  error: expected type-specifier #Gcc version must be 4.8.xx install wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo yum install devtoolset-2-gcc devtoolset-2-binutils devtoolset-2-gcc-c++ #add /etc/profile export CC=/opt/rh/devtoolset-2/root/usr/bin/gcc export CPP=/opt/rh/devtoolset-2/root/usr/bin/cpp export CXX=/opt/rh/devtoolset-2/root/usr/bin/c++ #. /etc/profile or source /etc/profile pecl install sqlsrv pdo_sqlsrv