An example of implementation of single responsibility within PHP

SingleResponsibility.php

<?php

Class Foo
{

	/**
	 * not a method with a single responsibility
	 */
	public function __construct()
	{
		//imagine there is a lot of procedural code here performing the following logic:
		
		//read request
		//configure the object
		//prepare session
	}
	
	//In order to 'fix' this you could instead implement the same logic in a more single 
	//responsibility manner, by moving all the logic to their own methods.
	//This will make the same code a lot more readable, testable and flexible for future changes.
	
	/**
	 * wrapper method for single responsibility methods
	 */
	public function __construct()
	{
		$this->readRequest();
		$this->init();
		$this->beginSession();
	}
	
	
	private function readRequest()
	{
		
	}
	
	private function init()
	{
		
	}
	
	private function beginSession()
	{
		
	}
}


?>