PHP metadata_exists函数代码示例

 /**
  * @param int $id
  *
  * @throws \Exception
  *
  * @return \stdClass();
  */
 public function retrieve($id)
 {
     $post = get_post($id);
     if (null === $post) {
         throw new \Exception('Vehicle not found');
     }
     $data = new \stdClass();
     $pm_prefix = 'wpcm_';
     $data->id = $post->ID;
     $data->short_description = $post->post_excerpt;
     $data->condition = get_post_meta($post->ID, $pm_prefix . 'condition', true);
     $data->make = get_post_meta($post->ID, $pm_prefix . 'make', true);
     $data->model = get_post_meta($post->ID, $pm_prefix . 'model', true);
     $data->frdate = new \DateTime(get_post_meta($post->ID, $pm_prefix . 'frdate', true));
     $data->price = get_post_meta($post->ID, $pm_prefix . 'price', true);
     $data->color = get_post_meta($post->ID, $pm_prefix . 'color', true);
     $data->mileage = get_post_meta($post->ID, $pm_prefix . 'mileage', true);
     $data->fuel_type = get_post_meta($post->ID, $pm_prefix . 'fuel_type', true);
     $data->transmission = get_post_meta($post->ID, $pm_prefix . 'transmission', true);
     $data->engine = get_post_meta($post->ID, $pm_prefix . 'engine', true);
     $data->body_style = get_post_meta($post->ID, $pm_prefix . 'body_style', true);
     $data->doors = get_post_meta($post->ID, $pm_prefix . 'doors', true);
     $data->features = wp_get_post_terms($post->ID, Taxonomies::FEATURES, array('fields' => 'names'));
     // get product gallery
     $product_image_gallery = '';
     if (metadata_exists('post', $post->ID, '_car_gallery')) {
         $product_image_gallery = get_post_meta($post->ID, '_car_gallery', true);
     }
     // set attachments ids
     $data->gallery_attachment_ids = array_filter(explode(',', $product_image_gallery));
     return $data;
 }

function bogo_update_user_option($user_id)
{
    global $wpdb;
    $meta_key = $wpdb->get_blog_prefix() . 'accessible_locale';
    if (!empty($_POST['setting_bogo_accessible_locales'])) {
        delete_user_meta($user_id, $meta_key);
        if (isset($_POST['bogo_accessible_locales'])) {
            $locales = (array) $_POST['bogo_accessible_locales'];
            $locales = bogo_filter_locales($locales);
            foreach ($locales as $locale) {
                add_user_meta($user_id, $meta_key, $locale);
            }
        }
        if (!metadata_exists('user', $user_id, $meta_key)) {
            add_user_meta($user_id, $meta_key, 'zxx');
            // zxx is a special code in ISO 639-2
        }
    }
    if (isset($_POST['bogo_own_locale'])) {
        $locale = trim($_POST['bogo_own_locale']);
        if (bogo_is_available_locale($locale)) {
            update_user_option($user_id, 'locale', $locale, true);
        }
    }
}

 public function getValue($postID = null)
 {
     $value = false;
     if (empty($this->settings['id'])) {
         return $value;
     }
     if ($this->type == self::TYPE_ADMIN) {
         $value = $this->getFramework()->getInternalAdminPageOption($this->settings['id'], $this->settings['default']);
     } else {
         if ($this->type == self::TYPE_META) {
             if (empty($postID)) {
                 $postID = $this->owner->postID;
             }
             // If no $postID is given, try and get it if we are in a loop.
             if (empty($postID) && !is_admin() && get_post() != null) {
                 $postID = get_the_ID();
             }
             // for meta options, use the default value for new posts/pages
             if (metadata_exists('post', $postID, $this->getID())) {
                 $value = get_post_meta($postID, $this->getID(), true);
             } else {
                 $value = $this->settings['default'];
             }
         } else {
             if ($this->type == self::TYPE_CUSTOMIZER) {
                 $value = get_theme_mod($this->getID(), $this->settings['default']);
             }
         }
     }
     // Apply cleaning method for the value (for serialized data, slashes, etc).
     $value = $this->cleanValueForGetting($value);
     return apply_filters('tf_get_value_' . $this->settings['type'] . '_' . $this->getOptionNamespace(), $value, $postID, $this);
 }

 public function __construct($post = null)
 {
     if (!empty($post) && ($post = get_post($post))) {
         $this->id = $post->ID;
         $this->date = get_the_time(__('Y/m/d g:i:s A', 'flamingo'), $this->id);
         $this->subject = get_post_meta($post->ID, '_subject', true);
         $this->from = get_post_meta($post->ID, '_from', true);
         $this->from_name = get_post_meta($post->ID, '_from_name', true);
         $this->from_email = get_post_meta($post->ID, '_from_email', true);
         $this->fields = get_post_meta($post->ID, '_fields', true);
         foreach ($this->fields as $key => $value) {
             $meta_key = sanitize_key('_field_' . $key);
             if (metadata_exists('post', $post->ID, $meta_key)) {
                 $value = get_post_meta($post->ID, $meta_key, true);
                 $this->fields[$key] = $value;
             }
         }
         $this->meta = get_post_meta($post->ID, '_meta', true);
         $this->akismet = get_post_meta($post->ID, '_akismet', true);
         $terms = wp_get_object_terms($this->id, self::channel_taxonomy);
         if (!empty($terms) && !is_wp_error($terms)) {
             $this->channel = $terms[0]->slug;
         }
         if (self::spam_status == get_post_status($post)) {
             $this->spam = true;
         } else {
             $this->spam = !empty($this->akismet['spam']);
         }
     }
 }

 public function __construct($post = null)
 {
     $this->initial = true;
     $this->form = '';
     $this->mail = array();
     $this->mail_2 = array();
     $this->messages = array();
     $this->additional_settings = '';
     $post = get_post($post);
     if ($post && self::post_type == get_post_type($post)) {
         $this->initial = false;
         $this->id = $post->ID;
         $this->title = $post->post_title;
         $props = $this->get_properties();
         foreach ($props as $prop => $value) {
             if (metadata_exists('post', $post->ID, '_' . $prop)) {
                 $this->{$prop} = get_post_meta($post->ID, '_' . $prop, true);
             } else {
                 $this->{$prop} = get_post_meta($post->ID, $prop, true);
             }
         }
         $this->upgrade();
     }
     do_action_ref_array('wpcf7_contact_form', array(&$this));
 }

/**
 * Update a product's stock amount.
 *
 * @param  int $product_id
 * @param  int $new_stock_level
 */
function wc_update_product_stock($product_id, $new_stock_level)
{
    $product = wc_get_product($product_id);
    if (!metadata_exists('post', $product_id, '_stock') || $product->get_stock_quantity() !== $new_stock_level) {
        $product->set_stock($new_stock_level);
    }
}

 /**
  * __isset function.
  *
  * @access public
  * @param mixed $key
  * @return bool
  */
 public function __isset($key)
 {
     if (!$this->id) {
         return false;
     }
     return metadata_exists('post', $this->id, '_' . $key);
 }

 /**
  * Read from the database.
  * @since 2.7.0
  * @param int $id ID of object to read.
  */
 public function read($id)
 {
     parent::read($id);
     if (!$this->get_id()) {
         return;
     }
     $post_object = get_post($id);
     $this->set_props(array('amount' => get_post_meta($this->get_id(), '_refund_amount', true), 'refunded_by' => metadata_exists('post', $this->get_id(), '_refunded_by') ? get_post_meta($this->get_id(), '_refunded_by', true) : absint($post_object->post_author), 'reason' => metadata_exists('post', $this->get_id(), '_refund_reason') ? get_post_meta($this->get_id(), '_refund_reason', true) : $post_object->post_excerpt));
 }

    /**
     * Output the metabox
     */
    public static function output($post)
    {
        ?>
		<div id="wps_deals_images_container">
			<ul class="wps_deals_images">
				<?php 
        $prefix = WPS_DEALS_META_PREFIX;
        if (metadata_exists('post', $post->ID, $prefix . 'image_gallery')) {
            $wps_deals_image_gallery = get_post_meta($post->ID, $prefix . 'image_gallery', true);
        } else {
            // Backwards compat
            $attachment_ids = get_posts('post_parent=' . $post->ID . '&numberposts=-1&post_type=attachment&orderby=menu_order&order=ASC&post_mime_type=image&fields=ids&meta_key=_deals_exclude_image&meta_value=0');
            $attachment_ids = array_diff($attachment_ids, array(get_post_thumbnail_id()));
            $wps_deals_image_gallery = implode(',', $attachment_ids);
        }
        $attachments = array_filter(explode(',', $wps_deals_image_gallery));
        if (!empty($attachments)) {
            foreach ($attachments as $attachment_id) {
                echo '<li class="image" data-attachment_id="' . esc_attr($attachment_id) . '">
								' . wp_get_attachment_image($attachment_id, 'thumbnail') . '
								<ul class="actions">
									<li><a href="#" class="delete tips" data-tip="' . esc_attr__('Delete image', 'wpsdeals') . '">' . __('Delete', 'wpsdeals') . '</a></li>
								</ul>
							</li>';
            }
        }
        ?>
			</ul>

			<input type="hidden" id="wps_deals_image_gallery" name="wps_deals_image_gallery" value="<?php 
        echo esc_attr($wps_deals_image_gallery);
        ?>
" />

		</div>
		<p class="add_wps_deals_images hide-if-no-js">
			<a href="#" data-choose="<?php 
        esc_attr_e('Add Images to Deals Gallery', 'wpsdeals');
        ?>
" data-update="<?php 
        esc_attr_e('Add to gallery', 'wpsdeals');
        ?>
" data-delete="<?php 
        esc_attr_e('Delete image', 'wpsdeals');
        ?>
" data-text="<?php 
        esc_attr_e('Delete', 'wpsdeals');
        ?>
"><?php 
        _e('Add Deals gallery images', 'wpsdeals');
        ?>
</a>
		</p>
		<?php 
    }

/**
 * Add `VATNumber` tag data
 *
 * this function searches for a VAT number order meta key used by the more
 * popular Tax/VAT plugins
 *
 * @param \WC_Order $order the order object
 * @return string - the VAT data to print
 */
function sv_wc_xml_export_vat_number_data($order)
{
    $vat_number = '';
    // find VAT number if one exists for the order
    $vat_number_meta_keys = array('_vat_number', 'VAT Number', 'vat_number', '_billing_wc_avatax_vat_id');
    foreach ($vat_number_meta_keys as $meta_key) {
        if (metadata_exists('post', $order->id, $meta_key)) {
            return get_post_meta($order->id, $meta_key, true);
        }
    }
    return $vat_number;
}

function vantage_metaslider_page_setting_metabox_render($post)
{
    $metaslider = get_post_meta($post->ID, 'vantage_metaslider_slider', true);
    $is_home = $post->ID == get_option('page_on_front');
    // If we're on the home page and the user hasn't explicitly set something here use the 'home_slider' theme setting.
    if ($is_home && empty($metaslider)) {
        $metaslider = siteorigin_setting('home_slider');
    }
    // Default stretch setting to theme setting.
    $metaslider_stretch = siteorigin_setting('home_slider_stretch');
    //Include the demo slider in the options if it's the home page.
    $options = siteorigin_metaslider_get_options($is_home);
    if (metadata_exists('post', $post->ID, 'vantage_metaslider_slider_stretch')) {
        $metaslider_stretch = get_post_meta($post->ID, 'vantage_metaslider_slider_stretch', true);
    }
    ?>
	<label><strong><?php 
    _e('Display Page Meta Slider', 'vantage');
    ?>
</strong></label>
	<p>
		<select name="vantage_page_metaslider">
			<?php 
    foreach ($options as $id => $name) {
        ?>
				<option value="<?php 
        echo esc_attr($id);
        ?>
" <?php 
        selected($metaslider, $id);
        ?>
><?php 
        echo esc_html($name);
        ?>
</option>
			<?php 
    }
    ?>
		</select>
	</p>
	<p class="checkbox-wrapper">
		<input id="vantage_page_metaslider_stretch" name="vantage_page_metaslider_stretch" type="checkbox" <?php 
    checked($metaslider_stretch);
    ?>
 />
		<label for="vantage_page_metaslider_stretch"><?php 
    _e('Stretch Page Meta Slider', 'vantage');
    ?>
</label>
	</p>
	<?php 
    wp_nonce_field('save', '_vantage_metaslider_nonce');
}

 /**
  * Read from the database.
  * @since 2.7.0
  * @param int $id ID of object to read.
  */
 public function read($id)
 {
     parent::read($id);
     // Read additonal order data
     if ($this->get_id()) {
         $post_object = get_post($id);
         $this->set_amount(get_post_meta($this->get_id(), '_refund_amount', true));
         // post_author was used before refunded_by meta.
         $this->set_refunded_by(metadata_exists('post', $this->get_id(), '_refunded_by') ? get_post_meta($this->get_id(), '_refunded_by', true) : absint($post_object->post_author));
         // post_excerpt was used before refund_reason meta.
         $this->set_reason(metadata_exists('post', $this->get_id(), '_refund_reason') ? get_post_meta($this->get_id(), '_refund_reason', true) : absint($post_object->post_excerpt));
     }
 }

    /**
     * Output the metabox
     */
    public function gallery_output($post)
    {
        ?>
		<div id="recipe_images_container">
			<ul class="recipe_images">
				<?php 
        if (metadata_exists('post', $post->ID, '_recipe_image_gallery')) {
            $recipe_image_gallery = get_post_meta($post->ID, '_recipe_image_gallery', true);
        } else {
            $recipe_image_gallery = '';
        }
        $attachments = array_filter(explode(',', $recipe_image_gallery));
        if ($attachments) {
            foreach ($attachments as $attachment_id) {
                echo '<li class="image" data-attachment_id="' . esc_attr($attachment_id) . '">
								' . wp_get_attachment_image($attachment_id, 'thumbnail') . '
								<ul class="actions">
									<li><a href="#" class="delete tips" data-tip="' . __('Delete image', 'recipe-hero') . '">' . __('Delete', 'recipe-hero') . '</a></li>
								</ul>
							</li>';
            }
        }
        ?>
			</ul>

			<input type="hidden" id="recipe_image_gallery" name="recipe_image_gallery" value="<?php 
        echo esc_attr($recipe_image_gallery);
        ?>
" />

		</div>
		<p class="add_recipe_images hide-if-no-js">
			<a href="#" data-choose="<?php 
        _e('Add Images to Recipe Gallery', 'recipe-hero');
        ?>
" data-update="<?php 
        _e('Add to gallery', 'recipe-hero');
        ?>
" data-delete="<?php 
        _e('Delete image', 'recipe-hero');
        ?>
" data-text="<?php 
        _e('Delete', 'recipe-hero');
        ?>
"><?php 
        _e('Add recipe gallery images', 'recipe-hero');
        ?>
</a>
		</p>
		<?php 
    }

 /**
  * Loads post's meta fields.
  */
 function fetch_post_meta()
 {
     if (false == $this->meta_data_loaded) {
         $this->meta_data_loaded = true;
         foreach ($this->meta_data_defaults as $key => $value) {
             if (metadata_exists('post', $this->post_id, $this->META_PREFIX . $key)) {
                 $this->meta_data[$key] = get_post_meta($this->post_id, $this->META_PREFIX . $key, true);
             } else {
                 $this->meta_data[$key] = $this->meta_data_defaults[$key];
             }
         }
     }
     return $this;
 }

 /**
  * job_listing_fields function.
  *
  * @access public
  * @return void
  */
 public function job_listing_fields()
 {
     global $post;
     $current_user = wp_get_current_user();
     $fields = array('_job_location' => array('label' => __('Location', 'wp-job-manager'), 'placeholder' => __('e.g. "London"', 'wp-job-manager'), 'description' => __('Leave this blank if the location is not important', 'wp-job-manager')), '_application' => array('label' => __('Application email/URL', 'wp-job-manager'), 'placeholder' => __('URL or email which applicants use to apply', 'wp-job-manager'), 'description' => __('This field is required for the "application" area to appear beneath the listing.', 'wp-job-manager'), 'value' => metadata_exists('post', $post->ID, '_application') ? get_post_meta($post->ID, '_application', true) : $current_user->user_email), '_company_name' => array('label' => __('Company name', 'wp-job-manager'), 'placeholder' => ''), '_company_website' => array('label' => __('Company website', 'wp-job-manager'), 'placeholder' => ''), '_company_tagline' => array('label' => __('Company tagline', 'wp-job-manager'), 'placeholder' => __('Brief description about the company', 'wp-job-manager')), '_company_twitter' => array('label' => __('Company Twitter', 'wp-job-manager'), 'placeholder' => '@yourcompany'), '_company_logo' => array('label' => __('Company logo', 'wp-job-manager'), 'placeholder' => __('URL to the company logo', 'wp-job-manager'), 'type' => 'file'), '_company_video' => array('label' => __('Company video', 'wp-job-manager'), 'placeholder' => __('URL to the company video', 'wp-job-manager'), 'type' => 'file'), '_filled' => array('label' => __('Position filled?', 'wp-job-manager'), 'type' => 'checkbox'));
     if ($current_user->has_cap('manage_job_listings')) {
         $fields['_featured'] = array('label' => __('Feature this listing?', 'wp-job-manager'), 'type' => 'checkbox', 'description' => __('Featured listings will be sticky during searches, and can be styled differently.', 'wp-job-manager'));
         $fields['_job_expires'] = array('label' => __('Expires', 'wp-job-manager'), 'placeholder' => __('yyyy-mm-dd', 'wp-job-manager'));
     }
     if ($current_user->has_cap('edit_others_job_listings')) {
         $fields['_job_author'] = array('label' => __('Posted by', 'wp-job-manager'), 'type' => 'author');
     }
     return apply_filters('job_manager_job_listing_data_fields', $fields);
 }