PHP Unconference Europe 2015

Memcached::prepend

(PECL memcached >= 0.1.0)

Memcached::prependPrepend 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_COMPRESSIONfalse);

$m->set('foo''abc');
$m->prepend('foo''def');
var_dump($m->get('foo'));
?>

O exemplo acima irá imprimir:

string(6) "defabc"

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