Php – Getting soap to run on a Vagrant CentOs machine

I have a vagrant machine on my local computer and I am testing an API that requires Soap.

For the life of me I cant get soap to install on the machine.

Checking phpinfo, I note:

SOAP Brad Lafountain, Shane Caraveo, Dmitry Stogov

Running the script returns:

Class 'SoapClient' not found in …

From the command line I have tried:

# yum install php-soap
Loaded plugins: presto, priorities, security
Setting up Install Process
2522 packages excluded due to repository priority protections
Package php-soap-5.5.30-1.el6.remi.x86_64 already installed and latest version
Nothing to do

In my php.ini file I have added the line:

extension=soap.so

(although I am unable to locate the soap .so file).

I have used puphpet to build my servers and have this for PHP:

php:
    install: '1'
    settings:
        version: '55'
    modules:
        php:
            - cli
            - intl
            - mcrypt
            - soap
        pear: {  }
        pecl:
            - pecl_http
    ini:
        display_errors: On
        error_reporting: '-1'
        session.save_path: /var/lib/php/session
        date.timezone: UTC
    fpm_ini:
        error_log: /var/log/php-fpm.log
    fpm_pools:
        phpfp_dwt088sfnfb2:
            ini:
                prefix: www
                listen: '127.0.0.1:9000'
                security.limit_extensions: .php
                user: www-user
                group: www-data
    composer: '1'
    composer_home: ''

I am not 100% sure of the best way to resolve this.