Memcached::prepend
(PECL memcached >= 0.1.0)
Memcached::prepend — Prepend data to an existing item
Description
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.
Parameters
-
key -
The key of the item to prepend the data to.
-
value -
The string to prepend.
Return Values
Returns true on success or false on failure.
Returns null when compression is on.
Errors/Exceptions
Returns null and raises an E_WARNING when
compression is enabled.
Examples
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"
See Also
- Memcached::prependByKey() - Prepend data to an existing item on a specific server
- Memcached::append() - Append data to an existing item
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