Shortcode to read out specific array elements

This topic has 2 replies, 2 voices, and was last updated 6 years, 5 months ago by Anh Tran.

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July 23, 2018 at 11:44 PM #10673
quint_rabbit
Participant
Hi everyone - I have still not got the hang of reading out of an array.

I have an array called "key_topic_1".
If I use the folowing shortcode, it displays the entire array, including headings:
[rwmb_meta meta_key="key_topic_1"]

The array has elements "topic, obj1, obj2, ..."
I want to use a shortcode to access the value of one specific element.

Could the shortcode be modified to work like this?
[rwmb_meta meta_key="key_topic_1.topic"]

[rwmb_meta meta_key="key_topic_1.obj1"]

Thanks in advance for any help.
Stephen.

PS: here is the array code from Meta Box Builder:
```
array (
          'id' => 'key_topic_1',
          'type' => 'fieldset_text',
          'name' => 'Key Topic 1',
          'desc' => 'Key Topic 1 and related Learning Objectives',
          'rows' => 2,
          'options' =>       array (
            'topic' => 'Topic',
            'obj1' => 'Learning Objective 1',
            'obj2' => 'Learning Objective 2',
            'obj3' => 'Learning Objective 3',
            'obj4' => 'Learning Objective 4',
            'obj5' => 'Learning Objective 5',
          ),
```
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July 24, 2018 at 1:19 AM #10675
quint_rabbit
Participant
Okay, I think I have done it!!
Long trial and error.
Please give me feedback on whether what I have done is a good idea!
Suggestions for improvements welcome!

I have created a new shortcode my_meta2 and I am calling it like this:
[my_meta2 meta_key="key_topic_1" element="topic"]
[my_meta2 meta_key="key_topic_1" element="obj1"]

In functions.php I have added this code:
```
add_action( 'init', function () {
  add_shortcode( 'my_meta2', function ( $atts ) {
    $atts   = shortcode_atts( [
      'meta_key' => '',
      'element' => '',
      'post_id'  => get_the_ID(),
    ], $atts );
    $value = rwmb_meta( $atts['meta_key'], array(), $atts['post_id'] );

return $value[$atts['element']];
} );
} );
```
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July 24, 2018 at 11:56 AM #10683

Anh Tran
Keymaster

Glad that you figured it out. Nice solution!

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