{

/**

public static function utf8_to_gsm0338($string)

{

$dict = array(

'@' => "\x00", '£' => "\x01", '$' => "\x02", '¥' => "\x03", 'è' => "\x04", 'é' => "\x05", 'ù' => "\x06", 'ì' => "\x07", 'ò' => "\x08", 'Ç' => "\x09", 'Ø' => "\x0B", 'ø' => "\x0C", 'Å' => "\x0E", 'å' => "\x0F",

'Δ' => "\x10", '_' => "\x11", 'Φ' => "\x12", 'Γ' => "\x13", 'Λ' => "\x14", 'Ω' => "\x15", 'Π' => "\x16", 'Ψ' => "\x17", 'Σ' => "\x18", 'Θ' => "\x19", 'Ξ' => "\x1A", 'Æ' => "\x1C", 'æ' => "\x1D", 'ß' => "\x1E", 'É' => "\x1F",

// all \x2? removed

// all \x3? removed

// all \x4? removed

'Ä' => "\x5B", 'Ö' => "\x5C", 'Ñ' => "\x5D", 'Ü' => "\x5E", '§' => "\x5F",

'¿' => "\x60",

'ä' => "\x7B", 'ö' => "\x7C", 'ñ' => "\x7D", 'ü' => "\x7E", 'à' => "\x7F",

'^' => "\x1B\x14", '{' => "\x1B\x28", '}' => "\x1B\x29", '\\' => "\x1B\x2F", '[' => "\x1B\x3C", '~' => "\x1B\x3D", ']' => "\x1B\x3E", '|' => "\x1B\x40", '€' => "\x1B\x65"

);

$converted = strtr($string, $dict);

// Replace unconverted UTF-8 chars from codepages U+0080-U+07FF, U+0080-U+FFFF and U+010000-U+10FFFF with a single ?

return preg_replace('/([\\xC0-\\xDF].)|([\\xE0-\\xEF]..)|([\\xF0-\\xFF]...)/m','?',$converted);

}

/**

public static function countGsm0338Length($utf8String)

{

$len = mb_strlen($utf8String,'utf-8');

$len += preg_match_all('/[\\^{}\\\~€|\\[\\]]/mu',$utf8String,$m);

return $len;

}

/**

public static function pack7bit($data)

{

$l = strlen($data);

$currentByte = 0;

$offset = 0;

$packed = '';

for ($i = 0; $i < $l; $i++) {

// cap off any excess bytes

$septet = ord($data[$i]) & 0x7f;

// append the septet and then cap off excess bytes

$currentByte |= ($septet << $offset) & 0xff;

// update offset

$offset += 7;

if ($offset > 7) {

// the current byte is full, add it to the encoded data.

$packed .= chr($currentByte);

// shift left and append the left shifted septet to the current byte

$currentByte = $septet = $septet >> (7 - ($offset - 8 ));

// update offset

$offset -= 8; // 7 - (7 - ($offset - 8))

}

}

if ($currentByte > 0) $packed .= chr($currentByte); // append the last byte

return $packed;

}

}