コピペで使え…る？ SNSシェアボタン PC・モバイル切り分け考 [Facebook, Twitter, LINE]

<?php
$full_url = get_permalink(); $url_encoded = rawurlencode($full_url);
$title_raw = get_the_title(); $title_encoded = rawurlencode($title_raw);
?> 
<div class="sns-share-btns">
  <?php if(wp_is_mobile()): // モバイルなら ?>
  <a href="https://twitter.com/share?text=<?php echo $title_encoded; ?>%0A&url=<?php echo $url_encoded; ?>%20by%20【@TwitterユーザーID】">【Tweetボタンの画像】</a>
  <a href="javascript:void(0);" onclick="fbShareClick()">【Facebookシェアボタンの画像】</a>
  <a href="https://line.me/R/msg/text/?<?php echo $title_encoded; ?>%0A<?php echo $url_encoded; ?>">【LINEで送るボタンの画像】</a>
  <?php else: // PCなら ?> 
  <a href="javascript:void(0);" onclick="window.open('https://twitter.com/intent/tweet?text=<?php echo $title_encoded; ?>%0A<?php echo $url_encoded; ?>%20by%20【@TwitterユーザーID】', '', 'width=700,height=auto'); return false;">【Tweetボタンの画像】</a>
  <a href="javascript:void(0);" onclick="window.open('https://www.facebook.com/sharer/sharer.php?u=<?php echo $url_encoded; ?>', '', 'width=700,height=auto'); return false;">【Facebookシェアボタンの画像】</a>
  <?php endif; ?>
</div>

var fbUrl = "fbapi://dialog/share?app_id=【FACEBOOK-for-Developersで登録のアプリID】&version=2.0&method_args=";
var methodArgs = {
  name: null,
  description: null,
  link: '<?php echo $full_url; ?>',
  quote: '<?php echo $title_raw; ?>',
  hashtag: null,
  dataFailuresFatal: false
  }
fbUrl += encodeURIComponent(JSON.stringify(methodArgs));
function fbShareClick() {
  location.href = fbUrl;          
};              

/**
 * Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
 *
 * @since 3.4.0
 *
 * @return bool
 */
function wp_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;
  }
  /**
   * Filters whether the request should be treated as coming from a mobile device or not.
   *
   * @since 4.9.0
   *
   * @param bool $is_mobile Whether the request is from a mobile device or not.
   */
  return apply_filters( 'wp_is_mobile', $is_mobile );
}