Removes the contents of the cache key in the group.

If the cache key does not exist in the group, then nothing will happen.

$key int|string Required

What the contents in the cache are called.

$group string Optional

Where the cache contents are grouped. Default 'default'.

Default: 'default'

$deprecated bool Optional

Unused.

Default: false

bool True on success, false if the contents were not deleted.

File: wp-includes/class-wp-object-cache.php. View all references

public function delete( $key, $group = 'default', $deprecated = false ) {
	if ( ! $this->is_valid_key( $key ) ) {
		return false;
	}

	if ( empty( $group ) ) {
		$group = 'default';
	}

	if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) {
		$key = $this->blog_prefix . $key;
	}

	if ( ! $this->_exists( $key, $group ) ) {
		return false;
	}

	unset( $this->cache[ $group ][ $key ] );
	return true;
}