February 12, 2011 
Definition:
function htmlentities2($myHTML) {}
Convert entities, while preserving already-encoded entities.
Parameters
- string $myHTML: The text to be converted.
Return values
returns:Converted text.
Source code
function htmlentities2($myHTML) {
$translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES );
$translation_table[chr(38)] = '&';
return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) );
}
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