<?php
$strText = 'Test111<br>222<br/>333\r444\n555';
$strText = preg_replace('/(<br\/*>|\\\r|\\\n)/', ' ', $strText);
PD9waHAKJHN0clRleHQgPSAnVGVzdDExMTxicj4yMjI8YnIvPjMzM1xyNDQ0XG41NTUnOwokc3RyVGV4dCA9IHByZWdfcmVwbGFjZSgnLyg8YnJcLyo+fFxcXHJ8XFxcbikvJywgJyAnLCAkc3RyVGV4dCk7Cgp2YXJfZHVtcCgkc3RyVGV4dCk7