How to Extract String?
<p>/common_subscriber/?content_id=4552823&amp;<strong>wapdld=8695411</strong>&amp;media_type=audio&amp;id_class=3&amp;section=ms_admin%2Fnewjson%2Findex__du&amp;media_format=mobile_audio_ring_real</p>

<p>I want to extract "wapdld=8695411" and save it in a variable. Please tell me . Help need urgently</p>
