Description:
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---
From manual page: http://www.php.net/function.strip-tags#Return Values
---


Test script:
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<?php // RAY_strip_tags_anomaly.php
error_reporting(E_ALL);

// SELF-CLOSING TAGS WITH SPACES
$str = '<td>USD<br /><br />CDN</td>';
$new = strip_tags($str);
echo $new; // Prints USDCDN

// TRY TO PRESERVE ALLOWABLE TAGS
$new = strip_tags($str, '<br />');
echo $new; // Prints USDCDN -- The break tag is not preserved

$new = strip_tags($str, '<br>');
echo $new; // Prints USD<br /><br />CDN

// SELF-CLOSING TAGS WITHOUT SPACES
$str = '<td>USD<br/><br/>CDN</td>';
$new = strip_tags($str, '<br/>');
echo $new; // Prints USD<br/><br/>CDN


Expected result:
----------------
strip_tags() should preserve the allowable_tags

Actual result:
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strip_tags did not always preserve the allowable_tags