<?php
$URL = "galatasaray-real-madrid-didier-drogba-basin-toplantisi-video-izle_16.html";
preg_match_all('#_(.*?).html#', $URL, $returnValue);

echo $returnValue[1][0];

?>

<?php
$STRING = "galatasaray-real-madrid-didier-drogba-basin-toplantisi-video-izle_16.html";

$PARCALA = explode("_",$STRING);
$SON_BOLUM = str_replace(".html",NULL,end( $PARCALA ));

echo $SON_BOLUM;

?>