centos install opcache code example
Example 1: centos install copmposer
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && php composer-setup.php --install-dir=/usr/local/bin --filename=composer
Example 2: install opam on centos
yum install sqlite-devel fuse fuse-devel libcurl-devel zlib-devel m4
yum install ocaml ocamldoc ocaml-camlp4-devel
wget [https://raw.github.com/ocaml/opam/master/shell/opam_installer.sh](https://raw.github.com/ocaml/opam/master/shell/opam_installer.sh) -O - | sh -s /usr/local/bin/
yum install