PHP is_feed函数代码示例

function bctt_shortcode($atts)
{
    extract(shortcode_atts(array('tweet' => '', 'via' => 'yes', 'url' => 'yes'), $atts));
    $handle = get_option('bctt-twitter-handle');
    if (!empty($handle) && $via != 'no') {
        $handle_code = "&via=" . $handle . "&related=" . $handle;
    } else {
        $handle_code = '';
    }
    $text = $tweet;
    if ($url != 'no') {
        if (get_option('bctt-short-url') != false) {
            $bcttURL = '&url=' . wp_get_shortlink();
        } else {
            $bcttURL = '&url=' . get_permalink();
        }
    } else {
        $bcttURL = '';
    }
    $bcttBttn = sprintf(__('Click To Tweet', 'better-click-to-tweet'));
    $short = bctt_shorten($text, 117 - (6 + mb_strlen($handle)));
    if (!is_feed()) {
        return "<div class='bctt-click-to-tweet'><span class='bctt-ctt-text'><a href='https://twitter.com/intent/tweet?text=" . urlencode($short) . $handle_code . $bcttURL . "' target='_blank'>" . $short . "</a></span><a href='https://twitter.com/intent/tweet?text=" . urlencode($short) . $handle_code . "&url=" . $bcttURL . "' target='_blank' class='bctt-ctt-btn'>" . $bcttBttn . "</a></div>";
    } else {
        return "<hr /><p><em>" . $short . "</em><br /><a href='https://twitter.com/intent/tweet?text=" . urlencode($short) . $handle_code . $bcttURL . "' target='_blank' class='bctt-ctt-btn'>" . $bcttBttn . "</a><br /><hr />";
    }
}

 /**
  * Modifying the Title
  *
  * Function tied to the wp_title filter hook.
  * @uses filter wp_title
  */
 function esteem_filter_wp_title($title)
 {
     global $page, $paged;
     // Get the Site Name
     $site_name = get_bloginfo('name');
     // Get the Site Description
     $site_description = get_bloginfo('description');
     $filtered_title = '';
     // For Homepage or Frontpage
     if (is_home() || is_front_page()) {
         $filtered_title .= $site_name;
         if (!empty($site_description)) {
             $filtered_title .= ' | ' . $site_description;
         }
     } elseif (is_feed()) {
         $filtered_title = '';
     } else {
         $filtered_title = $title . $site_name;
     }
     // Add a page number if necessary:
     if ($paged >= 2 || $page >= 2) {
         $filtered_title .= ' | ' . sprintf(__('Page %s', 'esteem'), max($paged, $page));
     }
     // Return the modified title
     return $filtered_title;
 }

 public function gallery_shortcode($val, $atts)
 {
     if (!empty($val)) {
         // something else is overriding post_gallery, like a custom VIP shortcode
         return $val;
     }
     global $post;
     $this->set_atts($atts);
     $attachments = $this->get_attachments();
     if (empty($attachments)) {
         return '';
     }
     if (is_feed() || defined('IS_HTML_EMAIL')) {
         return '';
     }
     if (method_exists($this, $this->atts['type'] . '_talavera')) {
         // Enqueue styles and scripts
         $this->default_scripts_and_styles();
         $gallery_html = call_user_func_array(array($this, $this->atts['type'] . '_talavera'), array($attachments));
         if ($gallery_html && class_exists('Jetpack') && class_exists('Jetpack_Photon')) {
             // Tiled Galleries in Jetpack require that Photon be active.
             // If it's not active, run it just on the gallery output.
             if (!in_array('photon', Jetpack::get_active_modules())) {
                 $gallery_html = Jetpack_Photon::filter_the_content($gallery_html);
             }
         }
         return $gallery_html;
     }
     return '';
 }

function jetpack_instagram_handler($matches, $atts, $url)
{
    global $content_width;
    static $did_script;
    // keep a copy of the passed-in URL since it's modified below
    $passed_url = $url;
    $max_width = 698;
    $min_width = 320;
    if (is_feed()) {
        $media_url = sprintf('http://instagr.am/p/%s/media/?size=l', $matches[2]);
        return sprintf('<a href="%s" title="%s"><img src="%s" alt="Instagram Photo" /></a>', esc_url($url), esc_attr__('View on Instagram', 'jetpack'), esc_url($media_url));
    }
    $atts = shortcode_atts(array('width' => isset($content_width) ? $content_width : $max_width, 'hidecaption' => false), $atts);
    $atts['width'] = absint($atts['width']);
    if ($atts['width'] > $max_width || $min_width > $atts['width']) {
        $atts['width'] = $max_width;
    }
    // remove the modal param from the URL
    $url = remove_query_arg('modal', $url);
    // force .com instead of .am for https support
    $url = str_replace('instagr.am', 'instagram.com', $url);
    // The oembed endpoint expects HTTP, but HTTP requests 301 to HTTPS
    $instagram_http_url = str_replace('https://', 'http://', $url);
    $instagram_https_url = str_replace('http://', 'https://', $url);
    $url_args = array('url' => $instagram_http_url, 'maxwidth' => $atts['width']);
    if ($atts['hidecaption']) {
        $url_args['hidecaption'] = 'true';
    }
    $url = esc_url_raw(add_query_arg($url_args, 'https://api.instagram.com/oembed/'));
    // Don't use object caching here by default, but give themes ability to turn it on.
    $response_body_use_cache = apply_filters('instagram_cache_oembed_api_response_body', false, $matches, $atts, $passed_url);
    $response_body = false;
    if ($response_body_use_cache) {
        $cache_key = 'oembed_response_body_' . md5($url);
        $response_body = wp_cache_get($cache_key, 'instagram_embeds');
    }
    if (!$response_body) {
        // Not using cache (default case) or cache miss
        $instagram_response = wp_remote_get($url, array('redirection' => 0));
        if (is_wp_error($instagram_response) || 200 != $instagram_response['response']['code'] || empty($instagram_response['body'])) {
            return "<!-- instagram error: invalid oratv resource -->";
        }
        $response_body = json_decode($instagram_response['body']);
        if ($response_body_use_cache) {
            // if caching it is short-lived since this is a "Cache-Control: no-cache" resource
            wp_cache_set($cache_key, $response_body, 'instagram_embeds', HOUR_IN_SECONDS + mt_rand(0, HOUR_IN_SECONDS));
        }
    }
    if (!empty($response_body->html)) {
        if (!$did_script) {
            $did_script = true;
            add_action('wp_footer', 'jetpack_instagram_add_script');
        }
        // there's a script in the response, which we strip on purpose since it's added above
        $ig_embed = preg_replace('@<(script)[^>]*?>.*?</\\1>@si', '', $response_body->html);
    } else {
        $ig_embed = jetpack_instagram_iframe_embed($instagram_https_url, $atts);
    }
    return $ig_embed;
}

function rssMsg($content)
{
    if (is_feed()) {
        $content = $content . '<hr /> *The SFMOMA blog feed has moved to a new location! <a href="http://feeds.feedburner.com/sfmoma/blog">http://feeds.feedburner.com/sfmoma/blog</a>  Please update your feed readers and bookmarks.* <hr />';
    }
    return $content;
}

 /**
  * Created early as possible in the wp_footer action this is the string to which we
  * will move JS resources after
  */
 function print_marker()
 {
     // is_feed() is important to not break Wordpress feeds and the WooCommerce api
     if ($this->valid_request && !is_feed()) {
         print $this->marker;
     }
 }

/**
 *
 * Only login users can read the text  shortcode
 * E.g. [member]This content is hiddent from users who are not logged in[/member]
 *
 *
 * @package	 aa_basic_shortcodes
 * @since    1.0.0
 */
function aa_login_users_only_shortcode($atts, $content = null)
{
    if (is_user_logged_in() && !is_feed() && !is_null($content)) {
        return $content;
    }
    return '';
}

function add_content_watermark($content)
{
    if (is_feed()) {
        return $content . ' Created by Amy Evans, copyright ' . date('Y') . ' all rights reserved.';
    }
    return $content;
}

 /**
  */
 public function get_content()
 {
     if (!is_null(parent::get_content()) && !is_feed() && current_user_can($this->get_att('capability'))) {
         return parent::get_content();
     }
     return null;
 }

function themeist_books_add_after_post_content($content)
{
    if (!is_feed() && !is_home() && is_singular() && is_main_query()) {
        $content .= themeist_books_get_details();
    }
    return $content;
}

function shot_get_posts($query)
{
    if (is_home() || is_feed()) {
        $query->set('post_type', array('post', 'link', 'attachment'));
    }
    return $query;
}

 public function FeedburnerFilter()
 {
     // Check this is active
     if (!$this->IsActive()) {
         return false;
     }
     // Bounce Feed Burner
     if (preg_match('/feedburner/i', $_SERVER['HTTP_USER_AGENT'])) {
         return false;
     }
     // Do nothing if not a feed
     if (!is_feed()) {
         return false;
     }
     // Do nothing if not configured
     if (empty($this->url)) {
         return false;
     }
     if (empty($this->id) && !empty($this->url)) {
         // Probably a Google Feedburner account
         header('Location: http://feeds2.feedburner.com/' . $this->url);
     } else {
         header('Location: ' . $this->url);
     }
     die;
 }

function autoptimize_start_buffering()
{
    if (!is_feed()) {
        // Config element
        $conf = autoptimizeConfig::instance();
        // Load our base class
        include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeBase.php';
        // Load extra classes and set some vars
        if ($conf->get('autoptimize_html')) {
            include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeHTML.php';
            @(include WP_PLUGIN_DIR . '/autoptimize/classes/minify-html.php');
        }
        if ($conf->get('autoptimize_js')) {
            include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeScripts.php';
            @(include WP_PLUGIN_DIR . '/autoptimize/classes/jsmin-1.1.1.php');
            define('CONCATENATE_SCRIPTS', false);
            define('COMPRESS_SCRIPTS', false);
        }
        if ($conf->get('autoptimize_css')) {
            include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeStyles.php';
            @(include WP_PLUGIN_DIR . '/autoptimize/classes/minify-css-compressor.php');
            define('COMPRESS_CSS', false);
        }
        if ($conf->get('autoptimize_js_yui') || $conf->get('autoptimize_css_yui')) {
            include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeYUI.php';
        }
        if ($conf->get('autoptimize_cdn_js') || $conf->get('autoptimize_cdn_css')) {
            include WP_PLUGIN_DIR . '/autoptimize/classes/autoptimizeCDN.php';
        }
        // Now, start the real thing!
        ob_start('autoptimize_end_buffering');
    }
}

function sfsi_social_buttons_below($content)
{
    global $post;
    $sfsi_section6 = unserialize(get_option('sfsi_section6_options', false));
    /* check if option activated in admin or not */
    if ($sfsi_section6['sfsi_show_Onposts'] == "yes") {
        $permalink = get_permalink($post->ID);
        $title = get_the_title();
        $sfsiLikeWith = "45px;";
        /* check for counter display */
        if ($sfsi_section6['sfsi_icons_DisplayCounts'] == "yes") {
            $show_count = 1;
            $sfsiLikeWith = "75px;";
        } else {
            $show_count = 0;
        }
        $txt = isset($sfsi_section6['sfsi_textBefor_icons']) ? $sfsi_section6['sfsi_textBefor_icons'] : "Share this Post with :";
        $float = $sfsi_section6['sfsi_icons_alignment'];
        $icons = "<div class='sfsi_Sicons' style='float:" . $float . "'><div style='float:left;margin:5px;'><span>" . $txt . "</span></div>";
        //adding wrapper div
        $icons .= "<div class='sfsi_socialwpr'>";
        $icons .= "<div class='sf_fb' style='width:" . $sfsiLikeWith . "'>" . sfsi_FBlike($permalink, $show_count) . "</div>";
        $icons .= "<div class='sf_google'>" . sfsi_googlePlus($permalink, $show_count) . "</div>";
        $icons .= "<div class='sf_addthis'>" . sfsi_Addthis($show_count) . "</div>";
        $icons .= "</div>";
        //closing wrapper div
        $icons .= "</div>";
        if (!is_feed() && !is_home() && !is_page()) {
            $content = $content . $icons;
        }
    }
    return $content;
}

/**
 * Cleans up the default WordPress [caption] shortcode.  The main purpose of this function is to remove the
 * inline styling WP adds, which creates 10px of padding around captioned elements.
 *
 * @since 0.1.0
 * @access private
 * @param string $output The output of the default caption (empty string at this point).
 * @param array $attr Array of arguments for the [caption] shortcode.
 * @param string $content The content placed after the opening [caption] tag and before the closing [/caption] tag.
 * @return string $output The formatted HTML for the caption.
 */
function cleaner_caption($output, $attr, $content)
{
    /* We're not worried abut captions in feeds, so just return the output here. */
    if (is_feed()) {
        return $output;
    }
    /* Set up the default arguments. */
    $defaults = array('id' => '', 'align' => 'alignnone', 'width' => '', 'caption' => '');
    /* Allow developers to override the default arguments. */
    $defaults = apply_filters('cleaner_caption_defaults', $defaults);
    /* Apply filters to the arguments. */
    $attr = apply_filters('cleaner_caption_args', $attr);
    /* Merge the defaults with user input. */
    $attr = shortcode_atts($defaults, $attr);
    /* If the width is less than 1 or there is no caption, return the content wrapped between the [caption] tags. */
    if (1 > $attr['width'] || empty($attr['caption'])) {
        return $content;
    }
    /* Set up the attributes for the caption <div>. */
    $attributes = !empty($attr['id']) ? ' id="' . esc_attr($attr['id']) . '"' : '';
    $attributes .= ' class="wp-caption ' . esc_attr($attr['align']) . '"';
    $attributes .= ' style="max-width: ' . esc_attr($attr['width']) . 'px"';
    /* Open the caption <div>. */
    $output = '<figure' . $attributes . '>';
    /* Allow shortcodes for the content the caption was created for. */
    $output .= do_shortcode($content);
    /* Append the caption text. */
    $output .= '<figcaption class="wp-caption-text">' . $attr['caption'] . '</figcaption>';
    /* Close the caption </div>. */
    $output .= '</figure>';
    /* Return the formatted, clean caption. */
    return apply_filters('cleaner_caption', $output);
}