ACF & PHP-API (WordPress): verschil tussen versies

Uit De Vliegende Brigade
Naar navigatie springen Naar zoeken springen
Regel 4: Regel 4:
  
 
To start with some bad news: While ACF fields are stored in tables <code>wp_options</code> or <code>wp_postmeta</code>, you cannot write directly to these tables to create ACF fields. Then the 'context' is missing, eg a repeater. So you have to do it via an API call.
 
To start with some bad news: While ACF fields are stored in tables <code>wp_options</code> or <code>wp_postmeta</code>, you cannot write directly to these tables to create ACF fields. Then the 'context' is missing, eg a repeater. So you have to do it via an API call.
 +
 +
== Two kinds of fields ==
 +
 +
There seems to be a distinction between two kinds of ACF fields and how to approach them:
 +
 +
* Fields that are associated with specific posts
 +
* Fiels that are ''not'' asssociated with specific posts.
 +
 +
== Retrieving a post-related field ==
 +
 +
Simple example: The home page of a site has ID=7. It has a custom field ''hero text''. How to fetch its value:
 +
 +
<pre>
 +
<?php
 +
 +
require_once("/var/www/example.com/wp-load.php");
 +
 +
the_field("hero_text",7);
 +
</pre>
 +
 +
Output:
 +
 +
<pre>
 +
Eat more chips!
 +
</pre>
 +
 +
* Function <code>[[The field (ACF) | the_field()]]</code> displays the value of a field directly
 +
* Alternatively, function <code>[[Get field() (ACF) | get_field()]] returns the value rather than directly displaying it.
  
 
== See also ==
 
== See also ==

Versie van 1 aug 2022 10:18

How can you automatically manage ACF fields? In particular, fill in, delete and edit?

Not directly at database level

To start with some bad news: While ACF fields are stored in tables wp_options or wp_postmeta, you cannot write directly to these tables to create ACF fields. Then the 'context' is missing, eg a repeater. So you have to do it via an API call.

Two kinds of fields

There seems to be a distinction between two kinds of ACF fields and how to approach them:

  • Fields that are associated with specific posts
  • Fiels that are not asssociated with specific posts.

Retrieving a post-related field

Simple example: The home page of a site has ID=7. It has a custom field hero text. How to fetch its value: 

<?php

require_once("/var/www/example.com/wp-load.php");

the_field("hero_text",7);

Output: 

Eat more chips!
  • Function the_field() displays the value of a field directly
  • Alternatively, function get_field() returns the value rather than directly displaying it.

See also

Sources
Overgenomen van "https://wiki.devliegendebrigade.nl/index.php?title=ACF_%26_PHP-API_(WordPress)&oldid=30447"