(PECL memcached >= 0.1.0)
Memcached::prepend — Prepend data to an existing item
$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.
Note:
If the
Memcached::OPT_COMPRESSIONis 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.
keyThe key of the item to prepend the data to.
valueThe string to prepend.
Returns true on success or false on failure.
The Memcached::getResultCode() will return
Memcached::RES_NOTSTORED if the key does not exist.
Example #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'));
?>
The above example will output:
string(6) "defabc"