由于个人电脑的原因，memcache.dll无法使用。这样我就无法操作memcached服务了。
思来想去，就自己写一个API吧。顺便也了解一下memcached协议。
贴代码
<?php
/**
*
* memcached连接客户端
*
*/
class my_memcache{
protected $socket = false;
protected $server_list = array();
protected $host = false;
protected $port = false;
protected $threshold = 0;
protected $min_saving = 0;
function __construct() {
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
}
function __destruct() {
socket_close($this->socket);
}
/**
* 完成
*/
public function add($key,$var,$flag=0,$expire=0){
$this->selectconnect($key);
if ( is_array($var) ){
$var = serialize($var);
}
$len = strlen($var);
if ( $len > $this->threshold && $this->threshold > 0 ){
$flag=1;
$var = $this->gz_ungz_compress($var,1);
$len = strlen($var);
}
$in = "add $key $flag $expire $len\r\n";
$in .= $var."\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
if ( strtoupper($out) == "STORED" ){
return true;
}else{
return false;
}
}
/**
* 完成
*/
public function addServer($host,$port,$persistent=true,$weight=1,$timeout=1,$retry_interval=15,$status=1,$failure_callback = NULL ,$timeoutms = 0){
if ( empty($host) || empty($port) ){
return false;
}
$this->server_list[] = array('host' => $host , 'port' => $port , 'persistent' => true, 'weight' => $weight , 'timeout' => $timeout , 'retry_interval' => $retry_interval , 'status' => $status , 'failure_callback' => $failure_callback );
}
/**
* 完成
*/
public function close(){
return socket_close($this->socket);
}
/**
* 完成
*/
public function connect($host,$port=11211,$timeout=1){
$this->host = $host;
$this->port = $port;
return socket_connect($this->socket,$host,$port);
}
/**
* 完成
*/
protected function selectconnect($key){
if ( empty($key) || empty($this->server_list) ){
return false;
}
$len = count($this->server_list)-1;
$first = ord(substr($key,0,1));
$key = $first%$len;
$server = $this->server_list[$key];
if ( $server['persistent'] ){
socket_get_option ($this->socket,1,SO_KEEPALIVE);
}
return socket_connect($this->socket,$server['host'],$server['port']);
}
/**
* 完成
*/
public function decrement($key,$value=1){
if ( empty($key) ){
return false;
}
$val = intval($value);
$this->selectconnect($key);
$in = "decr $key $val\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
return $out;
}
/**
* 完成
*/
public function delete($key,$timeout =0){
$this->selectconnect($key);
$in = "delete $key\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
if ( $out == 'DELETED' ){
return true;
}else if ( $out == 'NOT_FOUND' ){
return false;
}else{
return false;
}
}
/**
* 完成
*/
public function get($key,$flag=0){
if ( empty($key) ){
return false;
}
$this->selectconnect($key);
$in = "get $key $flag\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,90240);
$out_array = explode("\r\n",$out);
$l1 = $out_array[0];
$l1_array = explode(" ",$l1);
$content = str_replace(array("\r","\n"),'',$out_array[1]);
if ( $l1_array[2] == 1 ){
$content = $this->gz_ungz_compress($content,2);
}
if ( empty($content) ){
return false;
}else{
return $content;
}
}
/**
* 完成
*/
public function getServerStatus($host,$port=11211){
if ( empty($host) ){
return false;
}
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ( socket_connect($socket,$host,$port) ){
socket_close($socket);
return 1;
}else{
return 0;
}
}
/**
* 完成
*/
public function increment($key,$value=1){
if ( empty($key) ){
return false;
}
$val = intval($value);
$this->selectconnect($key);
$in = "incr $key $val\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
return $out;
}
/**
* 完成
*/
public function pconnect($host,$port=11211,$timeout=1){
if ( !socket_set_option($this->socket, SOL_SOCKET, SO_KEEPALIVE, 1) ) {
return false;
}
return socket_connect($this->socket,$host,$port);
}
/**
* 完成
*/
public function replace($key,$var,$flag=0,$expire=0){
$len = strlen($var);
if ( $len > $this->threshold && $this->threshold > 0 ){
$flag=1;
$var = $this->gz_ungz_compress($var,1);
$len = strlen($var);
}
$in = "replace $key $flag $expire $len\r\n";
$in .= $var."\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
if ( strtoupper($out) == "STORED" ){
return true;
}else{
return false;
}
}
/**
* 完成
*/
public function set($key,$var,$flag=0,$expire=0){
$this->selectconnect($key);
if ( is_array($var) ){
$var = serialize($var);
}
$len = strlen($var);
if ( $len > $this->threshold && $this->threshold > 0 ){
$flag=1;
$var = $this->gz_ungz_compress($var,1);
$len = strlen($var);
}
$in = "set $key $flag $expire $len\r\n";
$in .= $var."\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = trim(str_replace("\r\n","",$out));
if ( strtoupper($out) == "STORED" ){
return true;
}else{
return false;
}
}
/**
* 完成
*/
public function getVersion(){
$result = array();
if ( $this->server_list ){
foreach ( $this->server_list as $s ) {
$key = $s['host'].":".$s['port'];
$in = "version\r\n";
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($socket,$s['host'],$s['port']);
socket_write($socket, $in, strlen($in));
$out = socket_read($socket,1024);
$out = str_replace(array("\r","\n"),"",$out);
$out = str_replace("VERSION ","",$out);
$result[$key]= $out;
}
return $result;
}else{
$in = "version\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = str_replace(array("\r","\n"),"",$out);
$out = str_replace("VERSION ","",$out);
$key = $this->host.":".$this->port;
$result[$key]= $out;
return $result;
}
}
/**
* 完成
*/
public function flush(){
$result = array();
if ( $this->server_list ){
foreach ( $this->server_list as $s ) {
$key = $s['host'].":".$s['port'];
$in = "flush_all\r\n";
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($socket,$s['host'],$s['port']);
socket_write($socket, $in, strlen($in));
$out = socket_read($socket,1024);
$out = str_replace(array("\r","\n"),"",$out);
if ( $out == "OK" ){
$result[$key]= true;
}else{
$result[$key]= false;
}
}
return $result;
}else{
$in = "flush_all\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,1024);
$out = str_replace(array("\r","\n"),"",$out);
$key = $this->host.":".$this->port;
if ( $out == "OK" ){
$result[$key]= true;
}else{
$result[$key]= false;
}
return $result;
}
}
/**
* 完成
*/
public function getStats($type=0,$slabid=0,$limit=0){
$this->getExtendedStats($type,$slabid,$limit);
}
/**
* stats reset 清空统计数据=>返回reset
* stats slabs 显示各个slab的信息，包括chunk的大小、数目、使用情况等
* stats cachedump slab_id limit_num 显示某个slab中的前limit_num个key列表
* stats items
* stats detail [on|off|dump] 设置或者显示详细操作记录
* stats malloc 显示内存分配数据
*/
public function getExtendedStats($type=0,$slabid=0,$limit=0){
$type_list = array('reset','malloc','maps','cachedump','slabs','items','sizes');
if ( $type ){
if ( !in_array($type,$type_list) ){
$type = '';
}
}
$slabid = intval($slabid);
$limit = intval($limit);
$result = array();
if ( $this->server_list ){
foreach ( $this->server_list as $s ) {
$key = $s['host'].":".$s['port'];
$in = "stats\r\n";
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($socket,$s['host'],$s['port']);
socket_write($socket, $in, strlen($in));
$out = socket_read($socket,10240);
$out = explode("\r\n",$out);
foreach ($out as $s) {
if ( $s ){
$temp = explode(" ",$s);
if ( count($temp) > 2 ){
$result[$key][$temp[1]] = $temp[2];
}
}
}
}
return $result;
}else{
$in = "stats\r\n";
socket_write($this->socket, $in, strlen($in));
$out = socket_read($this->socket,10240);
if ( empty($out) ){
return false;
}else{
$key = $this->host.":".$this->port;
$out = explode("\r\n",$out);
foreach ($out as $s) {
if ( $s ){
$temp = explode(" ",$s);
if ( count($temp) > 2 ){
$result[$key][$temp[1]] = $temp[2];
}
}
}
return $result;
}
}
}
//开启大值自动压缩(完成)
public function setCompressThreshold($threshold,$min_saving){
$threshold = intval($threshold);
$min_saving = floatval($min_saving);
if ( $threshold <= 0 || $min_saving <= 0 || $min_saving >= 1 ){
return false;
}
$this->threshold = $threshold;
$this->min_saving = $min_saving*10;
return true;
}
//压解--压缩(完成) 默认压缩，否则解压
protected function gz_ungz_compress($string,$type=1){
if ( $type == 1 ){
return gzcompress($string,$this->min_saving);
}else{
return gzuncompress($string);
}
}
//运行时修改服务器参数和状态(完成)
public function setServerParams($host,$port,$timeout=1,$retry_interval=15,$status=1,$failure_callback = NULL){
if ( empty($host) || empty($port) ){
return false;
}
foreach ($this->server_list as $key => $row ) {
if ( $row['host'] == $host && $row['port'] == $port ){
$row['timeout'] = $timeout;
$row['retry_interval'] = $retry_interval;
$row['status'] = $status;
$row['failure_callback'] = $failure_callback;
$this->server_list[$key] = $row;
return true;
}
}
return false;
}
}
跟使用php的memcache扩展是一样的。这次更深入了解他的内部机制了.
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