Manages object and transient caches.
Quick links: Using | Installing | Contributing | Support
This package implements the following commands:
Adds, removes, fetches, and flushes the WP Object Cache object.
wp cache
By default, the WP Object Cache exists in PHP memory for the length of the request (and is emptied at the end). Use a persistent object cache drop-in to persist the object cache between requests.
Read the codex article for more detail.
EXAMPLES
# Set cache.
$ wp cache set my_key my_value my_group 300
Success: Set object 'my_key' in group 'my_group'.
# Get cache.
$ wp cache get my_key my_group
my_value
Adds a value to the object cache.
wp cache add <key> <value> [<group>] [<expiration>]
Errors if a value already exists for the key, which means the value can't be added.
OPTIONS
<key>
Cache key.
<value>
Value to add to the key.
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
[<expiration>]
Define how long to keep the value, in seconds. `0` means as long as possible.
---
default: 0
---
EXAMPLES
# Add cache.
$ wp cache add my_key my_group my_value 300
Success: Added object 'my_key' in group 'my_value'.
Decrements a value in the object cache.
wp cache decr <key> [<offset>] [<group>]
Errors if the value can't be decremented.
OPTIONS
<key>
Cache key.
[<offset>]
The amount by which to decrement the item's value.
---
default: 1
---
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
EXAMPLES
# Decrease cache value.
$ wp cache decr my_key 2 my_group
48
Removes a value from the object cache.
wp cache delete <key> [<group>]
Errors if the value can't be deleted.
OPTIONS
<key>
Cache key.
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
EXAMPLES
# Delete cache.
$ wp cache delete my_key my_group
Success: Object deleted.
Flushes the object cache.
wp cache flush
For WordPress multisite instances using a persistent object cache, flushing the object cache will typically flush the cache for all sites. Beware of the performance impact when flushing the object cache in production.
Errors if the object cache can't be flushed.
EXAMPLES
# Flush cache.
$ wp cache flush
Success: The cache was flushed.
Removes all cache items in a group, if the object cache implementation supports it.
wp cache flush-group <group>
OPTIONS
<group>
Cache group key.
EXAMPLES
# Clear cache group.
$ wp cache flush-group my_group
Success: Cache group 'my_group' was flushed.
Gets a value from the object cache.
wp cache get <key> [<group>]
Errors if the value doesn't exist.
OPTIONS
<key>
Cache key.
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
EXAMPLES
# Get cache.
$ wp cache get my_key my_group
my_value
Increments a value in the object cache.
wp cache incr <key> [<offset>] [<group>]
Errors if the value can't be incremented.
OPTIONS
<key>
Cache key.
[<offset>]
The amount by which to increment the item's value.
---
default: 1
---
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
EXAMPLES
# Increase cache value.
$ wp cache incr my_key 2 my_group
50
Replaces a value in the object cache, if the value already exists.
wp cache replace <key> <value> [<group>] [<expiration>]
Errors if the value can't be replaced.
OPTIONS
<key>
Cache key.
<value>
Value to replace.
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
[<expiration>]
Define how long to keep the value, in seconds. `0` means as long as possible.
---
default: 0
---
EXAMPLES
# Replace cache.
$ wp cache replace my_key new_value my_group
Success: Replaced object 'my_key' in group 'my_group'.
Sets a value to the object cache, regardless of whether it already exists.
wp cache set <key> <value> [<group>] [<expiration>]
Errors if the value can't be set.
OPTIONS
<key>
Cache key.
<value>
Value to set on the key.
[<group>]
Method for grouping data within the cache which allows the same key to be used across groups.
---
default: default
---
[<expiration>]
Define how long to keep the value, in seconds. `0` means as long as possible.
---
default: 0
---
EXAMPLES
# Set cache.
$ wp cache set my_key my_value my_group 300
Success: Set object 'my_key' in group 'my_group'.
Determines whether the object cache implementation supports a particular feature.
wp cache supports <feature>
OPTIONS
<feature>
Name of the feature to check for.
EXAMPLES
# Check whether is add_multiple supported.
$ wp cache supports add_multiple
$ echo $?
0
# Bash script for checking whether for support like this:
if ! wp cache supports non_existing; then
echo 'non_existing is not supported'
fi
Attempts to determine which object cache is being used.
wp cache type
Note that the guesses made by this function are based on the WP_Object_Cache classes that define the 3rd party object cache extension. Changes to those classes could render problems with this function's ability to determine which object cache is being used.
EXAMPLES
# Check cache type.
$ wp cache type
Default
Adds, gets, and deletes entries in the WordPress Transient Cache.
wp transient
By default, the transient cache uses the WordPress database to persist values
between requests. On a single site installation, values are stored in the
wp_options table. On a multisite installation, values are stored in the
wp_options or the wp_sitemeta table, depending on use of the --network
flag.
When a persistent object cache drop-in is installed (e.g. Redis or Memcached), the transient cache skips the database and simply wraps the WP Object Cache.
EXAMPLES
# Set transient.
$ wp transient set sample_key "test data" 3600
Success: Transient added.
# Get transient.
$ wp transient get sample_key
test data
# Delete transient.
$ wp transient delete sample_key
Success: Transient deleted.
# Delete expired transients.
$ wp transient delete --expired
Success: 12 expired transients deleted from the database.
# Delete all transients.
$ wp transient delete --all
Success: 14 transients deleted from the database.
Deletes a transient value.
wp transient delete [<key>] [--network] [--all] [--expired]
For a more complete explanation of the transient cache, including the
network|site cache, please see docs for wp transient.
OPTIONS
[<key>]
Key for the transient.
[--network]
Delete the value of a network|site transient. On single site, this is
is a specially-named cache key. On multisite, this is a global cache
(instead of local to the site).
[--all]
Delete all transients.
[--expired]
Delete all expired transients.
EXAMPLES
# Delete transient.
$ wp transient delete sample_key
Success: Transient deleted.
# Delete expired transients.
$ wp transient delete --expired
Success: 12 expired transients deleted from the database.
# Delete expired site transients.
$ wp transient delete --expired --network
Success: 1 expired transient deleted from the database.
# Delete all transients.
$ wp transient delete --all
Success: 14 transients deleted from the database.
# Delete all site transients.
$ wp transient delete --all --network
Success: 2 transients deleted from the database.
# Delete all transients in a multisite.
$ wp transient delete --all --network && wp site list --field=url | xargs -n1 -I % wp --url=% transient delete --all
Gets a transient value.
wp transient get <key> [--format=<format>] [--network]
For a more complete explanation of the transient cache, including the
network|site cache, please see docs for wp transient.
OPTIONS
<key>
Key for the transient.
[--format=<format>]
Render output in a particular format.
---
default: table
options:
- table
- csv
- json
- yaml
---
[--network]
Get the value of a network|site transient. On single site, this is
is a specially-named cache key. On multisite, this is a global cache
(instead of local to the site).
EXAMPLES
$ wp transient get sample_key
test data
$ wp transient get random_key
Warning: Transient with key "random_key" is not set.
Sets a transient value.
wp transient set <key> <value> [<expiration>] [--network]
<expiration> is the time until expiration, in seconds.
For a more complete explanation of the transient cache, including the
network|site cache, please see docs for wp transient.
OPTIONS
<key>
Key for the transient.
<value>
Value to be set for the transient.
[<expiration>]
Time until expiration, in seconds.
[--network]
Set the value of a network|site transient. On single site, this is
is a specially-named cache key. On multisite, this is a global cache
(instead of local to the site).
EXAMPLES
$ wp transient set sample_key "test data" 3600
Success: Transient added.
Determines the type of transients implementation.
wp transient type
Indicates whether the transients API is using an object cache or the database.
For a more complete explanation of the transient cache, including the
network|site cache, please see docs for wp transient.
EXAMPLES
$ wp transient type
Transients are saved to the database.
Lists transients and their values.
wp transient list [--search=<pattern>] [--exclude=<pattern>] [--network] [--unserialize] [--human-readable] [--fields=<fields>] [--format=<format>]
OPTIONS
[--search=<pattern>]
Use wildcards ( * and ? ) to match transient name.
[--exclude=<pattern>]
Pattern to exclude. Use wildcards ( * and ? ) to match transient name.
[--network]
Get the values of network|site transients. On single site, this is
a specially-named cache key. On multisite, this is a global cache
(instead of local to the site).
[--unserialize]
Unserialize transient values in output.
[--human-readable]
Human-readable output for expirations.
[--fields=<fields>]
Limit the output to specific object fields.
[--format=<format>]
The serialization format for the value.
---
default: table
options:
- table
- json
- csv
- count
- yaml
---
AVAILABLE FIELDS
This field will be displayed by default for each matching option:
- name
- value
- expiration
EXAMPLES
# List all transients
$ wp transient list
+------+-------+---------------+
| name | value | expiration |
+------+-------+---------------+
| foo | bar | 39 mins |
| foo2 | bar2 | no expiration |
| foo3 | bar2 | expired |
| foo4 | bar4 | 4 hours |
+------+-------+---------------+
This package is included with WP-CLI itself, no additional installation necessary.
To install the latest version of this package over what's included in WP-CLI, run:
wp package install git@github.com:wp-cli/cache-command.git
We appreciate you taking the initiative to contribute to this project.
Contributing isn’t limited to just code. We encourage you to contribute in the way that best fits your abilities, by writing tutorials, giving a demo at your local meetup, helping other users with their support questions, or revising our documentation.
For a more thorough introduction, check out WP-CLI's guide to contributing. This package follows those policy and guidelines.
Think you’ve found a bug? We’d love for you to help us get it fixed.
Before you create a new issue, you should search existing issues to see if there’s an existing resolution to it, or if it’s already been fixed in a newer version.
Once you’ve done a bit of searching and discovered there isn’t an open or fixed issue for your bug, please create a new issue. Include as much detail as you can, and clear steps to reproduce if possible. For more guidance, review our bug report documentation.
Want to contribute a new feature? Please first open a new issue to discuss whether the feature is a good fit for the project.
Once you've decided to commit the time to seeing your pull request through, please follow our guidelines for creating a pull request to make sure it's a pleasant experience. See "Setting up" for details specific to working on this package locally.
GitHub issues aren't for general support questions, but there are other venues you can try: https://wp-cli.org/#support
This README.md is generated dynamically from the project's codebase using wp scaffold package-readme (doc). To suggest changes, please submit a pull request against the corresponding part of the codebase.