PHP Command template

php_command_templates.php

<?php

$configuration = ['eth0' => ['ip_address' => '192.168.1.100', 'netmask' => '255.255.255.0', 'gateway_ip_address' => '192.168.1.1', 'interface' => 'eth0']];
$template = [
                'template' => 'ip addr add %s dev %s',
                'variables' => ['ip_address', 'interface'],
            ];

function build($configuration, $template)
{
    extract($configuration);
    return vsprintf($template['template'], compact($template['variables']));
}

$expect = 'ip addr add 192.168.1.100 dev eth0';
assert($expect == build($configuration['eth0'], $template));