Prepend data to an existing item

Descrição

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.

Nota:
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.

Parâmetros

key: The key of the item to prepend the data to.
value: The string to prepend.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha. The Memcached::getResultCode() will return Memcached::RES_NOTSTORED if the key does not exist.

Exemplos

Exemplo #1 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'));
?>

O exemplo acima irá imprimir:

string(6) "defabc"

Veja Também

Memcached::prependByKey() - Prepend data to an existing item on a specific server
Memcached::append() - Append data to an existing item