check full width hiragana

jvitfullwidthjapanese

echo isFullWidthHiragana('あいうえお');

=> true

Shortcut: ja.fullWidthHiragana

/**
* check fullwidth hiragana
*
* @return bool
*/
function isFullWidthHiragana($word)
{
  return preg_match('/^[ぁ-ん]+$/', $word);
}