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Summery Summery
Adds data to the cache if it doesn’t already exist.
Syntax Syntax
Parameters Parameters
- $key
-
(Required) What to call the contents in the cache.
- $data
-
(Required) The contents to store in the cache.
- $group
-
(Optional) Where to group the cache contents. Default 'default'.
Default value: 'default'
- $expire
-
(Optional) When to expire the cache contents. Default 0 (no expiration).
Return Return
(bool) True on success, false if cache key and group already exist.
Source Source
File: wp-includes/class-wp-object-cache.php
public function add( $key, $data, $group = 'default', $expire = 0 ) {
if ( wp_suspend_cache_addition() ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $key;
if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) {
$id = $this->blog_prefix . $key;
}
if ( $this->_exists( $id, $group ) ) {
return false;
}
return $this->set( $key, $data, $group, (int) $expire );
}
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Changelog Changelog
| Version | Description |
|---|---|
| 2.0.0 | Introduced. |