custom field content question

Possibly, pass the post id into the function and test if the custom field exists for that post id.

Hi,

What I am actually trying to achieve is to have a separate page where my data could be displayed. At first I wanted the plugin to create a page automatically (by entering page name in options menu) but it seems not possible. So a user will have to create a page himself and add a custom field with function from plugin. Then this function will display content in that page.

I have found working example in another plugin, however I’m struggling to adapt it to my needs.

function load_runninglog($content) {
  if (is_page()) {
    $cust_values = get_post_custom_values($this->runninglog_show);
    if ($cust_values != NULL) {
      $log_target = $cust_values[0];
      $content = $this->display_runninglog($log_target);
    }
  }
  return $content;
}

function display_runninglog($log_target) {
  echo "It's working!"
}

I get the following error. Fatal error: Using $this when not in object context in /var/www/wp-content/plugins/running-log/running-log.php on line 264.

I understand I need to get classes involved here. However I’m trying to avoid them as classes go beyond my meager programming knowledge. Is there a way to pass the post id into the function and test if the custom field exists for that post id without using classes?

Use global $post

function load_runninglog() {
global $post;
$content = "It's working! for post id ". $post->ID;
$custom_field_key = 'cf1'
$one_custom_field_value = get_post_meta($post->ID, $custom_field_key, true);
return $content;
}
add_filter('the_content', 'load_runninglog');

Hi Michael,

Thanks for helping me. It is working! I have added a cutom field value and key check and my content appears only on correct page now. That’s exactly what I wanted. However original content disappeared on all other pages and posts.

function load_runninglog() {
  global $post;
  $custom_field_key = 'load_runninglog';
  $one_custom_field_value = get_post_meta($post->ID, $custom_field_key, true);
  if ($one_custom_field_value == 'races') {
    $content = 'It works! for post id '. $post->ID;
  }
  return $content;
}

How can I avoid messing up with other content?

You’ll still want to use the Conditional Tags such as is_page().

Thank you, Michael.
It’s working now. ??