Moodle in English

i have troubles with mbstring.func_overload = 7 in some another places:

• Mail headers sometimes maked corrupted
• In "Recent activity" block headers of new forum posts is too math truncated

and, however, problem, that writed by you:

• pclzip module works wrong
• cryptography function used in make username cookie
• graphlib at non-english text output (after adding function foxy_utf8_to_nce recomended at http://php.net/manual/function.imagettftext.php#57416)
  

This and other mbstring overloading troubles becouse strlen function used for calculate Byte count, but with mbstring.internal_encoding = UTF-8 it is not.

based on http://php.net/manual/function.strlen.php#54906 i make this code and inject it in some places in moodlelib.php, gdlib, pclzip and others:

// <<-- Nashev, from php documentation comments for correct byte counting

if (!function_exists('ByteCount') ) {

	function ByteCount($s) {
		$has_mbstring = extension_loaded('mbstring') ||@dl(PHP_SHLIB_PREFIX.'mbstring.'.PHP_SHLIB_SUFFIX);
		$has_mb_shadow = (int) ini_get('mbstring.func_overload');

		if ($has_mbstring && ($has_mb_shadow & 2) ) {
		   $size = mb_strlen($s,'latin1');
		} else {
		   $size = strlen($s);
		}
		return $size;
	}

};

if (!function_exists('ByteSubstr') ) {

	function ByteSubstr($s, $start, $length) {
		$has_mbstring = extension_loaded('mbstring') ||@dl(PHP_SHLIB_PREFIX.'mbstring.'.PHP_SHLIB_SUFFIX);
		$has_mb_shadow = (int) ini_get('mbstring.func_overload');

		if ($has_mbstring && ($has_mb_shadow & 2) ) {
		   $s2 = mb_substr($s, $start, $length, 'latin1');
		} else {
		   $s2 = substr($s, $start, $length);
		}
		return $s2;
	}

};


// -->> Nashev

and replace some strlen calls to call ByteCount, and some calls of substr to ByteSubstr

I think, textlib.php module can make oter, more good decision, that function overriding