Overview
KB
Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Development
Learn PHP
 
<Memcached::prependMemcached::quit>
^MemcachedLast updated: Mon, 26 Oct 2026

Memcached::prependByKey

(PECL memcached >= 0.1.0)

Memcached::prependByKey — Prepend data to an existing item on a specific server

Description

public function Memcached::prependByKey(string $server_key, string $key, string $value): ?bool

Memcached::prependByKey() is functionally equivalent to Memcached::prepend(), except that the free-form server_key can be used to map the key to a specific server.

Parameters

server_key

The key identifying the server to store the value on or retrieve it from. Instead of hashing on the actual key for the item, we hash on the server key when deciding which memcached server to talk to. This allows related items to be grouped together on a single server for efficiency with multi operations.

key

The key of the item to prepend the data to.

value

The string to prepend.

Return Values

Returns true on success or false on failure. Returns null when compression is on.

Errors/Exceptions

Returns null and raises an E_WARNING when compression is enabled.

See Also


<Memcached::prependMemcached::quit>
^MemcachedLast updated: Mon, 26 Oct 2026