public function testUTF8IsCombiningCharacter()
{
$character = "͠";
$this->assertEqual(true, phutil_utf8_is_combining_character($character));
$character = 'a';
$this->assertEqual(false, phutil_utf8_is_combining_character($character));
}
/**
* Split a UTF-8 string into an array of characters. Combining characters
* are not split.
*
* @param string A valid utf-8 string.
* @return list A list of characters in the string.
*/
function phutil_utf8v_combined($string)
{
$components = phutil_utf8v($string);
$array_length = count($components);
// If the first character in the string is a combining character,
// prepend a space to the string.
if ($array_length > 0 && phutil_utf8_is_combining_character($components[0])) {
$string = ' ' . $string;
$components = phutil_utf8v($string);
$array_length++;
}
for ($index = 1; $index < $array_length; $index++) {
if (phutil_utf8_is_combining_character($components[$index])) {
$components[$index - 1] = $components[$index - 1] . $components[$index];
unset($components[$index]);
$components = array_values($components);
$index--;
$array_length = count($components);
}
}
return $components;
}