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(PHP 4 >= 4.2.0, PHP 5)

mcve_void --  VOID a transaction in the settlement queue

Description

int mcve_void ( resource conn, string username, string password, int sid, int ptrannum )

Warning

This function is currently not documented; only the argument list is available.

LXXII. Memcache Functions

Introduction

Memcache module provides handy procedural and object oriented interface to memcached, highly effective caching daemon, which was especially designed to decrease database load in dynamic web applications.

This module doesn't have native support of multiple servers, but you still can implement it yourself in your application. Establish several memcached connections, set priority level for each server etc.

More information about memcached can be found at http://www.danga.com/memcached/ .

Requirements

This module uses functions of zlib to support on-the-fly data compression. Zlib is required to install this module.

PHP 4.3.3 or newer is required to use the memcache extension.

Installation

This PECL extension is not bundled with PHP. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/memcache .

In order to use these functions you must compile PHP with MemCache support by using the --with-memcache[=DIR] option.

Windows users will enable php_memcache.dll inside of php.ini in order to use these functions. You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/ .

Predefined Constants

Table 1. MemCache Constants

Name Description MEMCACHE_COMPRESSED ( integer ) Used to turn on-the-fly data compression on with Memcache::set() , Memcache::add() and Memcache::replace() .

Runtime Configuration

This extension has no configuration directives defined in php.ini .

Resource Types

There is only one resource type used in memcache module - it's the link identifier for a cache server connection.

Examples

Example 1. memcache extension overview example

<?php

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

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

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

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

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

var_dump($get_result);

?>

In the above 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.

Table of Contents Memcache::add  -- Add an item to the server Memcache::close  -- Close memcached server connection Memcache::connect  -- Open memcached server connection memcache_debug  -- Turn debug output on/off Memcache::decrement  -- Decrement item's value Memcache::delete  -- Delete item from the server Memcache::flush  -- Flush all existing items at the server Memcache::get  -- Retrieve item from the server Memcache::getStats  -- Get statistics of the server Memcache::getVersion  -- Return version of the server Memcache::increment  -- Increment item's value Memcache::pconnect  -- Open memcached server persistent connection Memcache::replace  -- Replace value of the existing item Memcache::set  -- Store data at the server

Related Function(s)

Memcache_add()

Memcache_close()

Memcache_connect()

memcache_debug()

Memcache_decrement()

Memcache_delete()

Memcache_flush()

Memcache_get()

Memcache_getStats()

Memcache_getVersion()

Memcache_increment()

Memcache_pconnect()

Memcache_replace()

Memcache_set()