CakeFest 2024: The Official CakePHP Conference

Memcached::prepend

(PECL memcached >= 0.1.0)

Memcached::prependPrepend data to an existing item

Beschreibung

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

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.

Hinweis:

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.

Parameter-Liste

key

The key of the item to prepend the data to.

value

The string to prepend.

Rückgabewerte

Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben. Returns null when compression is on.

Fehler/Exceptions

Returns null and raises an E_WARNING when compression is enabled.

Beispiele

Beispiel #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'));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

string(6) "defabc"

Siehe auch

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