parser.php

<?php

/**
* Author Md. Sirajus Salayhin <salayhin@gmail.com>
* Class for parsing number	
*/

class Parser 
{

	private $numbers  = array();
	private $oddNumbers  = array();
	
	public function __construct($filePath)
	{
		$fp = fopen($filePath, 'r');

		while(($str = fgets($fp))) {
		
		    preg_match_all('/([0-9]+)/', $str, $matches);

		    if (!empty($matches[0])) {
		        foreach ($matches[0] AS $number) {
		            $this->numbers[] = $number;
		            if ($number % 2) {
		            	$this->oddNumbers[] = $number;
		       	    }
		        }
		    }	
		}
	}

	public function addNumber()
	{
		return array_sum($this->numbers);
	}

	public function getOddNumbers()
	{
		return $this->oddNumbers;
	}

	public function getAllNumbers()
	{
		return $this->numbers;
	}


}

// Create object

$parser = new Parser('test.txt');

$parser->addNumber();
$parser->getOddNumbers();
$parser->getAllNumbers();