In PHP if you want to replace multiple variables of the string at one go you could use strtr() instead of using str_replace().
Example :
$vars = array( '##session_date##'=>$sessiondate, '##session_time##'=>$sessiontime, '##conferencelinenumber##' =>$conferencelinenumber, '##pincode##' =>$pincode, '##coachingcommnets##'=>$coachingcomments, '##actioncommitmnets##'=>$actioncommitmnets, '##reminders##'=> ' ', '##name##' =>$name, '##breakline##'=>'<br><br>', ); $BODY=strtr($body, $vars);
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