请教内存共享的问题！！！
代码如下：
<br><?php<br><br>$sysid = $shmkey = ftok(__FILE__, 't');<br>$flags = "c";<br>$mode = 0766;<br>$size = 1024;<br><br>$shmid = shmop_open($sysid, $flags, $mode, $size);<br>shmop_write($shmid, "Hello", 0);<br>$len = shmop_size($shmid);<br>$cont = shmop_read($sysid, 0, "Hello");<br>var_dump($cont);<br>shmop_delete($shmid);<br>shmop_close($shmid);<br><br>?> <br>
这段代码报错，请问是怎么回事？
<br>PHP Warning: shmop_read(): no shared memory segment with an id of [1946257823] in /home/admin/codes/php/shmop/client.php on line 8<br><br>Warning: shmop_read(): no shared memory segment with an id of [1946257823] in /home/admin/codes/php/shmop/client.php on line 8<br>
------解决思路----------------------
$cont = shmop_read($shmid, 0, "Hello");
