Install PHP
CentOS 7 provide PHP 5.4. But Laravel require at least 5.6.4. I added REMI repo to make laravel work.
Before install remi, I install EPEL.
$ yum install epel-release
Next, install REMI.
Try this configuration wizard.
$ yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
After set repository, you can install PHP.
$ yum install composer php php-fpm php-mysqlnd
$ systemctl start php-fpm