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°²×°Íe³ÉÖ®ºo£¬memcached Ó¦¸ÃÔÚ /usr/bin/memcached¡£
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/usr/bin/memcached -d -m 128 -l 192.168.1.1 -p 11211 -u httpd
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µÚÒ»ÖÖ£¬PHP ÓÐÒ»¸o½Ð×o memcache µÄÀ(C)Õ¹£¬Linux ϱaÒeʱÐeÒª´øÉÏ ¨Cenable-memcache[=DIR] Ñ¡Ïi£¬Window ÏÂÔoÔÚ php.ini ÖÐÈ¥µo php_memcache.dll Ç°±ßµÄ×¢ÊÍ*u£¬Ê¹Æa¿ÉÓá£
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Ê×ÏÈ ÏÂÔØ memcached-client.php£¬ÔÚÏÂÔØÁË memcached-client.php Ö®ºo£¬¾Í¿ÉÒÔͨ¹ýÕa¸oÎļþÖеÄÀa¡°memcached¡±¶Ô memcached þÎñ½øÐвÙ×÷ÁË¡£Æaʵ´uÂeµ÷ÓÃdz£¼oµ¥£¬Ö÷Òª»aÓõ½µÄ½¨ÓÐ add()¡¢get()¡¢replace() ºÍ delete()£¬½¨ËµÃ÷ÈçÏ£º
add ($key, $val, $exp = 0)Íu memcached ÖÐдÈe¶ÔÏo£¬$key ÊǶÔÏoµÄΨһ±eʶ*u£¬$val ÊÇдÈeµÄ¶ÔÏoÊý¾Ý£¬$exp Ϊ¹ýÆÚʱ¼a£¬µ¥Î»ÎªÃe£¬Ä¬ÈÏΪ²»ÏÞʱ¼a£»
get ($key)´Ó memcached ÖлñÈ¡¶ÔÏoÊý¾Ý£¬Í¨¹ý¶ÔÏoµÄΨһ±eʶ*u $key »ñÈ¡£»
replace ($key, $value, $exp=0)ʹÓà $value Ìae»» memcached ÖбeʶuΪ $key µÄ¶ÔÏoÄÚÈÝ£¬²ÎÊýÓe add() ½*¨Ò»Ñu£¬Ö»ÓÐ $key ¶ÔÏo´aeÔÚµÄÇe¿oϲŻaÆð×÷Óã»
delete ($key, $time = 0)ɾ³ý memcached Öбeʶ*uΪ $key µÄ¶ÔÏo£¬$time Ϊ¿ÉÑ¡²ÎÊý£¬±iʾɾ³ý֮ǰÐeÒªµÈ´ý¶a³¤Ê±¼a¡£
ÏÂÃaeÊÇÒ»¶Î¼oµ¥µÄ²aÊÔ´uÂe£¬´uÂeÖжԱeʶ*uΪ 'mykey' µÄ¶ÔÏoÊý¾Ý½øÐдaeÈ¡²Ù×÷£º
<?php
// °uº¬ memcached ÀaÎļþ
require_once('memcached-client.php');
// Ñ¡ÏiÉeÖÃ
$options = array(
'servers' => array('192.168.1.1:11211'), //memcached *þÎñµÄµØÖ*¡¢¶Ë¿Ú£¬¿ÉÓöa¸oÊý×eÔªËرiʾ¶a¸o memcached *þÎñ
'debug' => true, //ÊÇ*ñ´o¿ª debug
'compress_threshold' => 10240, //³¬¹ý¶aÉÙ×Ö½ÚµÄÊý¾Ýʱ½øÐÐѹËo
'persistant' => false //ÊÇ*ñʹÓó־ÃÁ¬½Ó
);
// ´´½¨ memcached ¶ÔÏoʵÀý
$mc = new memcached($options);
// ÉeÖô˽ű¾Ê¹ÓõÄΨһ±eʶ*u
$key = 'mykey';
// Íu memcached ÖÐдÈe¶ÔÏo
$mc->add($key, 'some random strings');
$val = $mc->get($key);
echo "n".str_pad('$mc->add() ', 60, '_')."n";
var_dump($val);
// Ìae»»ÒÑдÈeµÄ¶ÔÏoÊý¾ÝÖµ
$mc->replace($key, array('some'=>'haha', 'array'=>'xxx'));
$val = $mc->get($key);
echo "n".str_pad('$mc->replace() ', 60, '_')."n";
var_dump($val);
// ɾ³ý memcached ÖеĶÔÏo
$mc->delete($key);
$val = $mc->get($key);
echo "n".str_pad('$mc->delete() ', 60, '_')."n";
var_dump($val);
?>
ÊDz»ÊǺܼoµ¥£¬ÔÚʵ¼ÊÓ¦ÓÃÖУ¬Í¨³£»a°ÑÊý¾Ý¿a²eѯµÄ½a¹u¼¯±£´aeµ½ memcached ÖУ¬Ï´ÎÃÎÊʱֱ½Ó´Ó memcached ÖлñÈ¡£¬¶ø²»ÔÙ×oÊý¾Ý¿a²eѯ²Ù×÷£¬ÕaÑu¿ÉÒÔÔںܴo³Ì¶ÈÉϼoÇaÊý¾Ý¿aµÄ¸ºµ£¡£Í¨³£»a½« SQL Ói¾a md5() Ö®ºoµÄÖµ×÷ΪΨһ±eʶu key¡£Ï±ßÊÇÒ»¸oÀuÓà memcached À´»º´aeÊý¾Ý¿a²eѯ½a¹u¼¯µÄʾÀý£¨´Ë´uÂeƬ¶Î½o½ÓÉϱߵÄʾÀý´uÂe£(C)£º
<?php
$sql = 'SELECT * FROM users';
$key = md5($sql); //memcached ¶ÔÏo±eʶ*u
{
// ÔÚ memcached ÖÐδ»ñÈ¡µ½»º´aeÊý¾Ý£¬ÔoʹÓÃÊý¾Ý¿a²eѯ»ñÈ¡¼Ç¼¼¯¡£
echo "n".str_pad('Read datas from MySQL.', 60, '_')."n";
$conn = mysql_connect('localhost', 'test', 'test');
mysql_select_db('test');
$result = mysql_query($sql);
while ($row = mysql_fetch_object($result))
$datas[] = $row;
// ½«Êý¾Ý¿aÖлñÈ¡µ½µÄ½a¹u¼¯Êý¾Ý±£´aeµ½ memcached ÖУ¬ÒÔ¹(C)Ï´Î*ÃÎÊʱʹÓá£
$mc->add($key, $datas);
{
echo "n".str_pad('Read datas from memcached.', 60, '_')."n";
}
var_dump($datas);
?>
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Óû§ÃÎÊÍøҳʱ£¬²e¿´ memcached ÖÐÊÇñÓе±Ç°Óû§µÄ SESSION Êý¾Ý£¬Ê¹Óà session_id() ×÷ΪΨһ±eʶu£»Èç¹uÊý¾Ý´aeÔÚ£¬ÔoÖ±½Óµ»Ø£¬Èç¹u²»´aeÔÚ£¬ÔÙ½øÐÐÊý¾Ý¿aÁ¬½Ó£¬»ñÈ¡ SESSION Êý¾Ý£¬²¢½«´ËÊý¾Ý±£´aeµ½ memcached ÖУ¬¹(C)Ï´ÎʹÓã»
µ±Ç°µÄ PHP ÔËÐнaÊø£¨»oʹÓÃÁË session_write_close()£(C)ʱ£¬»aµ÷Óà My_Sess::write() ½¨£¬½«Êý¾ÝдÈeÊý¾Ý¿a£¬ÕaÑuµÄ»°£¬Ã¿´ÎÈÔÈ»»aÓÐÊý¾Ý¿a²Ù×÷£¬¶ÔÓÚÕa¸o½¨£¬Ò²ÐeÒª½øÐÐÓÅ»¯¡£Ê¹ÓÃÒ»¸oÈ«¾Ö±aÁ¿£¬¼Ç¼Óû§½øÈeÒ³ÃaeʱµÄ SESSION Êý¾Ý£¬È»ºoÔÚ write() ½¨ÄڱȽϴËÊý¾ÝÓeÏeҪдÈeµÄ SESSION Êý¾ÝÊÇñÏaͬ£¬²»Í¬²Å½øÐÐÊý¾Ý¿aÁ¬½Ó¡¢Ð´ÈeÊý¾Ý¿a£¬Í¬Ê±½« memcached ÖжÔÓ¦µÄ¶ÔÏoɾ³ý£¬Èç¹uÏaͬµÄ»°£¬Ôo±iʾ SESSION Êý¾Ýδ¸Ä±a£¬ÄÇô¾Í¿ÉÒÔ²»×oÈκβÙ×÷£¬Ö±½Óµ»ØÁË£»
ÄÇôÓû§ SESSION ¹ýÆÚʱ¼aÔoô½a¾oÄØ£¿¼ÇµÃ memcached µÄ add() ½¨Óиo¹ýÆÚʱ¼a²ÎÊý $exp Â𣿰ÑÕa¸o²ÎÊýÖµÉeÖóÉСÓÚ SESSION ×i´o´ae»iʱ¼a¼´¿É¡£ÁiÍa±ðÍuÁ˸øÄÇÐ(C)Ò»Ö±ÔÚÏßµÄÓû§ÑÓÐø SESSION ʱ³¤£¬Õa¸o¿ÉÒÔÔÚ write() ½¨Öнa¾o£¬Í¨¹ýÅжÏʱ¼a£¬*uºÏÌo¼þÔo¸uÐÂÊý¾Ý¿aÊý¾Ý¡£
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