Wp post meta get (WP-CLI): verschil tussen versies

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Regel 72: Regel 72:
 
wp post meta get 7 buttonbars_${bb}_buttonbar_title
 
wp post meta get 7 buttonbars_${bb}_buttonbar_title
 
wp post meta get $id buttonbars_${bb}_buttonbar_title
 
wp post meta get $id buttonbars_${bb}_buttonbar_title
 +
</pre>
 +
 +
== Check for the existence of an attachment ==
 +
 +
Use case: A script to update alt texts of images. Along the way, first check if the given post id actually corresponds to an image.
 +
 +
Examples:
 +
 +
<pre>
 +
#
 +
# Post-id refers to an image
 +
#####################################
 +
#
 +
$ wp post meta get 62808 _wp_attached_file
 +
 +
2021/06/4611-0283_3-LOGO.jpg
 +
 +
 +
# post-id doesn't exist
 +
#####################################
 +
#
 +
$ wp post meta get 63948 _wp_attached_file
 +
 +
Error: Could not find the post with ID 63948.
 +
 +
 +
# post-id exists, but isn't an image
 +
#####################################
 +
#
 +
$ wp post meta get 7 _wp_attached_file
 +
 +
# No output
 
</pre>
 
</pre>
  

Versie van 21 sep 2023 11:50

wp post meta get: Get the values for a particular meta object. In other words: What does the value field in table wp_postmeta say for this id and this key. This works for both scalars and serialized data. 

$ wp help post meta get

NAME

  wp post meta get

DESCRIPTION

  Get meta field value.

SYNOPSIS

  wp post meta get <id> <key> [--format=<format>]

OPTIONS

  <id>
    The ID of the object.

  <key>
    The name of the meta field to get.

  [--format=<format>]
    Get value in a particular format.
    ---
    default: var_export
    options:
      - var_export
      - json
      - yaml
    ---

Voorbeelden

Gebaseerd op het voorbeeld hieronder tav. wp post meta list: 

wp post meta get 7 hero_text

<!--
First version - Until 2020.09.25
<h2>BlahBlah</h2>
-->
<!--
<h2>BlahBlah-2</h2>
-->
<h2>BlahBlah-3</h2>

Dit werkt ook voor serialised data: 

wp post meta get 7 banner_pick_tool_link

array (
  'title' => 'Onze widget-Keuzehulp >',
  'url' => 'http://en.s1/widget-keuzehulp/',
  'target' => '',
)

Hoe je parameters kunt gebruiken in de argumenten: Alledrie de varianten werken: 

id=7
bb=3
wp post meta get 7 buttonbars_3_buttonbar_title
wp post meta get 7 buttonbars_${bb}_buttonbar_title
wp post meta get $id buttonbars_${bb}_buttonbar_title

Check for the existence of an attachment

Use case: A script to update alt texts of images. Along the way, first check if the given post id actually corresponds to an image.

Examples: 

#
# Post-id refers to an image
#####################################
#
$ wp post meta get 62808 _wp_attached_file

2021/06/4611-0283_3-LOGO.jpg


# post-id doesn't exist
#####################################
#
$ wp post meta get 63948 _wp_attached_file

Error: Could not find the post with ID 63948.


# post-id exists, but isn't an image
#####################################
#
$ wp post meta get 7 _wp_attached_file

# No output

Zie ook

Overgenomen van "https://wiki.devliegendebrigade.nl/index.php?title=Wp_post_meta_get_(WP-CLI)&oldid=35122"