fetch attribute of tag using curl request without domDocument in php

i have URL : http://ift.tt/1LvbSlT

want to find <meta name="p:domain_verify" content="1e8715341cd73cff926f648b6dd4a089"/> and want to fetch only 1e8715341cd73cff926f648b6dd4a089 value as output. content value may change according to your browser.

I dont want to use domDocument