PHPでのデバイス分岐を簡易的に導入

if(wp_is_mobile()) {
  // モバイル向けのコード
} else {
  // モバイル以外へのコード
};

/**
* Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
*
* @return bool true|false
*/function wp_is_mobile() {
  static $is_mobile;

  if ( isset($is_mobile) )
    return $is_mobile;

  if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
    $is_mobile = false;
  } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {
      $is_mobile = true;
  } else {
    $is_mobile = false;
  }

  return $is_mobile;
}