private function __trim($str)
{
// 両サイドのスペースを消す
$str = trim($str);
// 改行、タブをスペースへ
$str = preg_replace('/[\n\r\t]/', '', $str);
// 複数スペースを一つへ
$str = preg_replace('/\s(?=\s)/', '', $str);
return $str;
}
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