Wondering about the post meta your theme and/or plugins might be creating?
Want to find the name of a specific post meta key?
Need some help debugging your post meta?
The JSM Show Post Meta plugin displays all post meta (aka custom fields) keys and their unserialized values in a metabox at the bottom of post editing pages.
There are no plugin settings — simply install and activate the plugin.
If you need to create an array of store hours (for example), the following function can generate an associative array of values quickly, with the hours formatted and stepped (every hour, 30 mins, etc.) as you wish.
I’ve seen similar functions using DateTime(), but we’re already working with timestamps, so there’s really no need.
I often want to output an array for debugging purposes, but using var_dump() or print_r() on an array that includes true / false values and class objects can be problematic — false values appear empty, and class objects can include too much information. I wrote the following recursive static method (presented here as a function) to pre-filter an array for readability when using print_r() or var_dump().
WPSSO Ridiculously Responsive Social Sharing Buttons (WPSSO RRSSB) version 0.2 has just been released this morning.
This new extension plugin for WPSSO adds Ridiculously Responsive Social Sharing Buttons to posts / pages, custom post types, bbPress, BuddyPress, WooCommerce product pages, and many more. The sharing buttons can be included in your content, excerpts, in a floating CSS sidebar, in a widget, from shortcodes, and on admin editing pages. The Scalable Vector Graphics (SVG) used by WPSSO RRSSB resize automatically to their container size, so they always look great from any device, including high resolution retina displays.
If you manage a DNS master, and push zones to several slaves / secondaries, you may have found that over time — as configuration files and firewall rules change — one or more slaves may have lost its ability to update its zone files. Perhaps the slave is no longer being notified, or it may have lost the necessary zone transfer permissions from the master. In a large distributed environment where DNS changes are frequent, checking the SOA serial number for all the NS servers in a zone can be quite helpful — a quick way to eliminate the DNS as a possible source of a problem. Here is a perl script I wrote a few years back to retrieve the SOA serial number for a given domain.
Recently, I needed to sync several directories on a backup / fail-over server with the same directories on a production server. Rsync over SSH takes care of this, but if you want to tighten security, you must use the “command” restriction in the SSH authorized_keys file — This restricts the authenticated key to running a single command, with a specific set of arguments. For example, let’s look at a typical command that might be run from a backup server to rsync daily database dumps:
backup$ rsync -av --delete -e "ssh -i $HOME/.ssh/prod-rsync-key" \
prod:/var/lib/mysql/dump/ /var/lib/mysql/dump/
Nginx Inc. provides access to the nginx-plus package and repository using SSL certificates. Their instructions include the configuration of apt for Ubuntu, but for people using apt-mirror and Puppet to manage their internal servers, additional custom configurations are required.
The standard apt configuration for nginx-plus might look like this:
$ cat /etc/apt/apt.conf.d/90nginx
Acquire::https::plus-pkgs.nginx.com::Verify-Peer "true";
Acquire::https::plus-pkgs.nginx.com::Verify-Host "true";
Acquire::https::plus-pkgs.nginx.com::CaInfo "/etc/ssl/nginx/CA.crt";
Acquire::https::plus-pkgs.nginx.com::SslCert "/etc/ssl/nginx/nginx-repo.crt";
Acquire::https::plus-pkgs.nginx.com::SslKey "/etc/ssl/nginx/nginx-repo.key";The connection to the nginx-plus repository must be made using HTTPS and authentication is handled by client certificates. As provided, apt-mirror is not able to manage SSL certificates, so two sections in the apt-mirror script must be modified. The %config_variables array defines the settings read from its configuration files. We will add the ‘certificate’, ‘private_key’, and ‘ca_certificate’ settings to the array.
There are a few functions available to retrieve the URL and size of an image in the WordPress Media Library, but few people know that these functions will often lie about an image’s dimensions.
As an example, let’s define a custom image size of 1000 x 1000 cropped, and use image_downsize() to retrieve the URL and size of an image ID (this example can be used with wp_get_attachment_image_src() as well). I’ll use list() in the example, instead of an array variable for the return values, to keep the code more readable. ;-)
add_image_size( 'my-custom-size', 1000, 1000, true );
list( $img_url, $img_width, $img_height, $img_is_intermediate ) = image_downsize( $id, 'my-custom-size' );WordPress will return a URL for the image and the values of $width / $height may be 1000 / 1000 – it all depends on several factors.