custom field content question

  • Resolved dovydas

    (@dovydas)


    16 years, 4 months ago

    I’m writing my first plugin and I want to use custom fields.

    I have the following code:

    function load_runninglog() {
$content = "It's working!";
return $content;
}
add_filter('the_content', 'load_runninglog');

    The problem is that I get “It’s working!” duplicated on ALL pages, however I would like this text to appear only on the page where I have added custom field.

    How can I fix this?

Viewing 6 replies - 1 through 6 (of 6 total)
  • MichaelH

    (@michaelh)

    16 years, 4 months ago

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

    Thread Starter dovydas

    (@dovydas)

    16 years, 4 months ago

    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?

    MichaelH

    (@michaelh)

    16 years, 4 months ago

    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');
    Thread Starter dovydas

    (@dovydas)

    16 years, 4 months ago

    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?

    MichaelH

    (@michaelh)

    16 years, 4 months ago

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

    Thread Starter dovydas

    (@dovydas)

    16 years, 4 months ago

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

Viewing 6 replies - 1 through 6 (of 6 total)

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