laravel 5 windows下支持memcache

[clms2]

php_memcached.dll扩展在windows下暂时找不到安装方式，原因

所以laravel下使用memcache扩展并修改相关的系统文件。原文地址, 防止以后访问不了，这边也记录下。
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手工修改：

• vendor/laravel/framework/src/Illuminate/Session/SessionManager.php，并增加如下代码：

/**
     * Create an instance of the Memcached session driver.
     *
     * @return IlluminateSessionStore
     */
    protected function createMemcacheDriver()
    {
        return $this->createCacheBased('memcache');
    }

• vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php 增加以下代码:

/**
     * Create an instance of the Memcache cache driver.
     *
     * @return IlluminateCacheMemcachedStore
     */
    protected function createMemcacheDriver(array $config)
    {
        $prefix = $this->getPrefix($config);

        $memcache = $this->app['memcache.connector']->connect($config['servers']);

        return $this->repository(new MemcacheStore($memcache, $prefix));
    }

• /vendor/laravel/framework/src/Illuminate/Cache/CacheServiceProvider.php 修改代码：

/**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('cache', function ($app) {
            return new CacheManager($app);
        });

        $this->app->singleton('cache.store', function ($app) {
            return $app['cache']->driver();
        });

        $this->app->singleton('memcached.connector', function () {
            return new MemcachedConnector;
        });

        $this->app->singleton('memcache.connector', function () {
            return new MemcacheConnector;
        });

        $this->registerCommands();
    }

/**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        return [
            'cache', 'cache.store', 'memcached.connector', 'command.cache.clear', 'command.cache.table', 'memcache.connector',
        ];
    }

• 新增文件 /vendor/laravel/framework/src/Illuminate/Cache/MemcacheConnector.php：

<?php
namespace Illuminate\Cache;

use Memcache;
use RuntimeException;

class MemcacheConnector {

    /**
     * Create a new Memcached connection.
     *
     * @param array  $servers
     * @return Memcache
     */
    public function connect(array $servers)
    {
        $memcache = $this->getMemcache();

        // For each server in the array, we'll just extract the configuration and add
        // the server to the Memcache connection. Once we have added all of these
        // servers we'll verify the connection is successful and return it back.
        foreach ($servers as $server)
        {
            $memcache->addServer($server['host'], $server['port'], $server['weight']);
        }

        if ($memcache->getVersion() === false)
        {
            throw new RuntimeException("Could not establish Memcache connection.");
        }

        return $memcache;
    }

    /**
     * Get a new Memcache instance.
     *
     * @return Memcached
     */
    protected function getMemcache()
    {
        return new Memcache;
    }
}

• 新增文件 /vendor/laravel/framework/src/Illuminate/Cache/MemcacheStore.php:

<?php

namespace Illuminate\Cache;

use Memcache;
use Illuminate\Contracts\Cache\Store;

class MemcacheStore extends TaggableStore implements Store
{
    /**
     * The Memcached instance.
     *
     * @var \Memcached
     */
    protected $memcached;

    /**
     * A string that should be prepended to keys.
     *
     * @var string
     */
    protected $prefix;

    public function __construct(Memcache $memcache, $prefix = '')
    {
        $this->memcache = $memcache;
        $this->prefix = strlen($prefix) > 0 ? $prefix.':' : '';
    }

    /**
     * Retrieve an item from the cache by key.
     *
     * @param  string|array  $key
     * @return mixed
     */
    public function get($key)
    {
        return $this->memcache->get($this->prefix.$key);
    }


    /**
     * Retrieve multiple items from the cache by key.
     *
     * Items not found in the cache will have a null value.
     *
     * @param  array  $keys
     * @return array
     */
    public function many(array $keys)
    {
        $prefixedKeys = array_map(function ($key) {
            return $this->prefix.$key;
        }, $keys);

        $values = $this->memcache->getMulti($prefixedKeys, null, Memcache::GET_PRESERVE_ORDER);

        if ($this->memcache->getResultCode() != 0) {
            return array_fill_keys($keys, null);
        }

        return array_combine($keys, $values);
    }

    /**
     * Store an item in the cache for a given number of minutes.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @param  int     $minutes
     * @return void
     */
    public function put($key, $value, $minutes)
    {
        $compress = is_bool($value) || is_int($value) || is_float($value) ? false : MEMCACHE_COMPRESSED;
        $this->memcache->set($this->prefix.$key, $value, $compress, $minutes * 60);
    }

    /**
     * Store multiple items in the cache for a given number of minutes.
     *
     * @param  array  $values
     * @param  int  $minutes
     * @return void
     */
    public function putMany(array $values, $minutes)
    {
        $prefixedValues = [];

        foreach ($values as $key => $value) {
            $prefixedValues[$this->prefix.$key] = $value;
        }

        $this->memcache->setMulti($prefixedValues, $minutes * 60);
    }
     /**
     * Store an item in the cache if the key doesn't exist.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @param  int     $minutes
     * @return bool
     */
    public function add($key, $value, $minutes)
    {
        return $this->memcache->add($this->prefix.$key, $value, $minutes * 60);
    }

    /**
     * Increment the value of an item in the cache.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return int|bool
     */
    public function increment($key, $value = 1)
    {
        return $this->memcache->increment($this->prefix.$key, $value);
    }

    /**
     * Decrement the value of an item in the cache.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return int|bool
     */
    public function decrement($key, $value = 1)
    {
        return $this->memcache->decrement($this->prefix.$key, $value);
    }

    /**
     * Store an item in the cache indefinitely.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return void
     */
    public function forever($key, $value)
    {
        $this->put($key, $value, 0);
    }

    /**
     * Remove an item from the cache.
     *
     * @param  string  $key
     * @return bool
     */
    public function forget($key)
    {
        return $this->memcache->delete($this->prefix.$key);
    }

    /**
     * Remove all items from the cache.
     *
     * @return void
     */
    public function flush()
    {
        $this->memcache->flush();
    }

    /**
     * Get the underlying Memcached connection.
     *
     * @return \Memcached
     */
    public function getMemcached()
    {
        return $this->memcache;
    }

    /**
     * Get the cache key prefix.
     *
     * @return string
     */
    public function getPrefix()
    {
        return $this->prefix;
    }

    /**
     * Set the cache key prefix.
     *
     * @param  string  $prefix
     * @return void
     */
    public function setPrefix($prefix)
    {
        $this->prefix = ! empty($prefix) ? $prefix.':' : '';
    }
}

• 修改config/cache.php 新增代码：

'memcache' => [
            'driver'  => 'memcache',
            'servers' => [
                [
                    'host' => env('MEMCACHED_HOST', '127.0.0.1'),
                    'port' => env('MEMCACHED_PORT', 11211),
                    'weight' => 100,
                ],
            ],
        ],

• 最后，再需要用到memcache的地方把driver修改即可，eg：'driver' => 'memcache',