DockerContainer.php
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DockerContainer.php
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	<?php

	class DockerContainer {
	private $host;
	private $container;

	/**
	* Initializes a new instance of the DockerContainer class
	*
	* @param string $host hostname
	* @param string $container container name
	*/
	public function __construct ($host, $container) {
	if (!self::isValidHostname($host)) {
	throw new ArgumentException("Invalid hostname.");
	}
	if (!self::isValidContainerName($container)) {
	throw new ArgumentException("Invalid container name.");
	}

	$this->host = $host;
	$this->container = $container;
	}

	/**
	* Determines if a hostname is valid
	*
	* @return bool true if the specified name is valid; otherwise, false
	*/
	public static function isValidHostname ($host) {
	return (bool)preg_match('/^[A-Za-z0-9\-\.]+$/', $host);
	}

	/**
	* Determines if a container name is valid
	*
	* @return bool true if the specified name is valid; otherwise, false
	*/
	public static function isValidContainerName ($name) {
	//Source: https://github.com/ajhager/docker/commit/f63cdf0260cf6287d28a589a79d3f947def6a569
	return (bool)preg_match('@^/?[a-zA-Z0-9_-]+$@', $name);
	}

	/**
	* Executes the specified command in the container
	*
	* @param string $command the command to run
	* @return string the command output
	*/
	public function exec ($command) {
	$output = `ssh $this->host docker exec $this->container $command`;
	return trim($output);
	}
	}