setHook( "embed_webpage", "embed_webpage_handler" );
}
function embed_webpage_handler( $input, $argv )
{
$allowedchars = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'_', '/', '.', ':','?','=','@','&');
if( str_replace($allowedchars, '', $input) == '' )
{
return "";
}
else
{
return "Error: invalid character sequence between <embed_webpage>...</embed_webpage> markers, allowed
are only";
}
}
?>