<?php

$string="34=No,46=fgbfb,48=NA,29=NA,45=dsd,49=InConclusive,43=1BHK,35=NA,38=12,39=2,27=q1,41=Others,52=fgfdg,47=fgfg,31=Chawl,33=UpperMiddleClass,37=SelfOwned,30=fdgfdgb,50=fgfdgb,51=fgfdg,32=NA,44=[Refrigerator,Airconditioner]";
preg_match_all('~\d+=(?:\[[^]]*]|[^,]*)~', $string, $results);
print_r($results[0]);