$site='<img class="alignleft size-thumbnail wp-image-2106" title="Git Gel ülkesi" src="http://siteadresi.com/wp-content/afisler/tideland-141x210.jpg"
 alt="Git Gel ülkesi" width="141" height="210"> <img class="alasdeft size-thumsbnail wp-image-23106" title="Gsdat Gel ülkesi" src="http://siteadresi.com/wp-content/afisler/tddeland-143x210.jpg"
 alt="Git Gsadlkesi" width="121" height="210"> ';

preg_match_all('/<img[^>]*src="(.*?)"[^>]*>/',$site,$match);
print_r($match);

Array
(
    [0] => Array
        (
            [0] => <img class="alignleft size-thumbnail wp-image-2106" title="Git Gel ülkesi" src="http://siteadresi.com/wp-content/afisler/tideland-141x210.jpg"
 alt="Git Gel ülkesi" width="141" height="210">
            [1] => <img class="alasdeft size-thumsbnail wp-image-23106" title="Gsdat Gel ülkesi" src="http://siteadresi.com/wp-content/afisler/tddeland-143x210.jpg"
 alt="Git Gsadlkesi" width="121" height="210">
        )

    [1] => Array
        (
            [0] => http://siteadresi.com/wp-content/afisler/tideland-141x210.jpg
            [1] => http://siteadresi.com/wp-content/afisler/tddeland-143x210.jpg
        )

)

foreach($match[1] as $value)
{
	echo $value."<br>";
	
	
}