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@ 2014-01-23T11:26:46Z

<?php
$str=<<<TXT
<br>Text1
<br>Text2
<br>            
<br>            
<br>
<br>Text3
<br>
<br>
<br>
<br>Text4
TXT;

echo preg_replace('#<br>\s*(\n|$)#','',$str);

Output
Performance
VLD
References
Branches

preg_replace: documentation ( source)

preferences:dark modelive preview

43.16 ms | 402 KiB | 5 Q