Memcached::prepend

(PECL memcached >= 0.1.0)

Prepend data to an existing item

public bool Memcached::prepend ( string $key, string $value )

Memcached::prepend() prepends the given value string to the value of an existing item. The reason that value is forced to be a string is that prepending mixed types is not well-defined.

Note:

If the Memcached::OPT_COMPRESSION is enabled, the operation will fail and a warning will be issued, because prepending compressed data to a value that is potentially already compressed is not possible.

Parameters:

key

The key of the item to prepend the data to.

value

The string to prepend.

Returns:

Returns TRUE on success or FALSE on failure. The Memcached::getResultCode() will return Memcached::RES_NOTSTORED if the key does not exist.

Examples:

Memcached::prepend() example

<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->setOption(Memcached::OPT_COMPRESSION, false);
 
$m->set('foo', 'abc');
$m->prepend('foo', 'def');
var_dump($m->get('foo'));
?>

The above example will output:

string(6) "defabc"