(PECL memcached >= 0.1.0)
Memcached::setMulti — Store multiple items
public Memcached::setMulti ( array $items [, int $expiration ] ) : bool
 Memcached::setMulti() is similar to Memcached::set(), but instead of a single key/value item, it works on multiple items specified in items. The expiration time applies to all the items at once. 
items
An array of key/value pairs to store on the server.
expiration
The expiration time, defaults to 0. See Expiration Times for more info.
 Returns true on success or false on failure. Use Memcached::getResultCode() if necessary. 
Example #1 Memcached::setMulti() example
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$items = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => 'value3'
);
$m->setMulti($items, time() + 300);
?> 
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    https://www.php.net/manual/en/memcached.setmulti.php