regex - php Regular expression fails -

i'm trying match string going last else loop. can please provide help?

$cstg = "<result>true<\/result>";  if (preg_match("/<result>true<\/result>/", $cstg)) {     echo "result success"; } else if (preg_match("/\<result\>false\<\/result\>/", $cstg)) {     echo "result fail"; } else {     echo "something went wrong."; } 

issue coming $cstg string. don't have escape \ in html text. following code working fine:

$cstg = "<result>true</result>";  if( preg_match("/<result>true<\/result>/", $cstg)){     echo "result success"; } elseif  (preg_match("/\<result\>false\<\/result\>/", $cstg)){     echo "result fail"; }else{     echo "something went wrong."; }