PHP 8.0.0 Beta 4 available for testing

Basic usage

Example #1 memcache extension overview example

In this example, an object is being saved in the cache and then retrieved back. Object and other non-scalar types are serialized before saving, so it's impossible to store resources (i.e. connection identifiers and others) in the cache.


= new Memcache;
$memcache->connect('localhost'11211) or die ("Could not connect");

$version $memcache->getVersion();
"Server's version: ".$version."<br/>\n";

$tmp_object = new stdClass;
$tmp_object->str_attr 'test';
$tmp_object->int_attr 123;

$memcache->set('key'$tmp_objectfalse10) or die ("Failed to save data at the server");
"Store data in the cache (data will expire in 10 seconds)<br/>\n";

$get_result $memcache->get('key');
"Data from the cache:<br/>\n";



Example #2 Using memcache session handler


"tcp://$host:$port?persistent=1&weight=2&timeout=2&retry_interval=10,  ,tcp://$host:$port  ";


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User Contributed Notes 3 notes

atesin > gmail
1 month ago
moderator please merge these posts

an errata to my comment done on 2020-07-28 01:05 about tmpfs session dir...

the tmpfs directory i used to install session files is "/run" not "/tmp"...  as /tmp is auto (or manual) deleted sometimes
atesin > gmail
1 month ago
memcached is great, is lightning fast, very versatile and useful, scalable, and is a must have for many projects

but if you only want speed to minimize session file blocking there is also a good alternative, tmpfs

maybe if you are in debian you already had session directory in tmp (mounted as tmpfs), but beware of daily cleaning process that can mess up your sessions

you can use this trick if you are in centos/other (like me) or even if you are in debian but want to get ride of /tmp cleaning task

i realized in my system /run is also mounted as tmpfs, so i shut php-fpm down, moved my php session dir to /tmp/, reconfigure php and start again... (you can adapt it to your situation)

  systemctl stop php-fpm
  cp -a /var/lib/php/session /tmp/php-session
  vim /etc/php-fpm-d/www.conf
  php_value[session.save_path] = /run/php-session
  systemctl start php-fpm

the only drawback is tmpfs is VOLATILE, just like memcached (data is lost on unmount/shutdown/power fail), to  circumvent this risk i wrote another service that restores/backup php session dir before/after php starts/stops... (UNTESTED!)

  vim /etc/systemd/system/php-session-backup.service
  # basic persistence for tmpfs php sessions
  Description=PHP tmpfs sessions backup/restore on shutdown/boot
  ExecStart=rm -fr /run/php-session
  ExecStart=cp -fa /var/lib/php/session /run/php-session
  ExecStop=rm -fr /var/lib/php/session
  ExecStop=cp -fa /run/php-session /var/lib/php/session
  systemctl enable php-session-backup

you can also complement this with a daily backup task in case of system crash so you will lose just one day

  crontab -e
  0 4 * * * rm -fr /var/lib/php/session;cp -fa /run/php-session /var/lib/php/session

this is very rough though, you can better use inotify + rsync, could take some ideas from here
dkreuter at gmail dot com
11 years ago
If the example doesn't work try to change "localhost" to "".
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