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php 无法连接 memcache

昨天在 linux 虚拟机装了一个 memcache,在 php 可以正常存取数据。 今天重启 linux, 却发现 php 无法连接memcache, 但 telnet 可以连接, 可以存取数据。 希望有大侠帮解答一下,解决问题,马上结贴,给意见、帮顶都给分。

我的 php 代码如下
$memcache = new Memcache; 
$memcache->connect('localhost', 11211);
$memcache->set('key', 'test'); 
$get_value = $memcache->get('key'); 
echo $get_value;

------解决方案--------------------
是不是端口没占了?
------解决方案--------------------
代碼正常。
telnet 成功可以表示端口正常。

telnet localhost 11211
set key 0 0 3
123
看看能否存儲。
------解决方案--------------------
无法连接。总会有错误信息的吧。贴出来瞅瞅。
------解决方案--------------------
求错误信息。
------解决方案--------------------
同求 你这没有错误信息  怎么破啊

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