<?php

$num = '89--35(- 358741()3';
$numClean = preg_replace ('/[)( -]*/',"",$num);
if (mb_strlen($numClean)>11){ 
echo "THIS IS A MISTAAAKE";
	break;
}
else { 
	echo "$numClean";}
if (mb_substr($numClean,0,1)=='/8|+7/'){
	echo "'$numClean";
} else {
	echo "THIS IS A FUCKING MISTAAAAAKE";
	break;
}
$finishedNum = preg_replace ('/+7/',8,$numClean);
echo "$finishedNum";