$url = "https://lh3.googleusercontent.com/MbK_AHR-HOg1T572PoEPT5Qu9Y7Rcua4yQXE2q4ZF8wI_aTXgrUxGeM5eHIWbtveLb2POwqzftnQAQ=m18?cpn=vOb099FH6FRIz4uG&c=WEB&cver=1.20160824
";
preg_match("/googleusercontent.com\/(.*?)=/", $url, $result);
$istenenkisim = $result[1];
echo $istenenkisim;