Maison >développement back-end >tutoriel php >php shmop_open的有关问题
php shmop_open的问题
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php $arr=array();function application($key,$value=""){ global $arr; if($value=="") { $shm_id = @shmop_open(12345, "a", 0644,100); }else{ @$shm_id = shmop_open(12345, "c",0,0); if(!$shm_id) { $shm_id=shmop_open(12345,"c",0644,100); } } @$byte=shmop_read($shm_id,0,1024*1024); if(!$byte){ return ""; }else{ if($byte!=""){ $arr=unserialize($byte); }else{ return ""; } } if($value=="")//取值 { shmop_close($shm_id); if(array_key_exists($key,$arr)) { return $arr[$key]; } return ""; }else{ $arr[$key]=$value; shmop_write($shm_id,serialize($arr),0); shmop_close($shm_id); }}?>
$p = new shared;//$p->a = 'abcd';//$p->b = 1234;print_r($p->_all);echo $p->b;class shared { private $shm_id; private $shm_key = 0xff3; private $shm_size = 1024; function __construct() { $this->shm_id = shmop_open($this->shm_key, "c", 0644, $this->shm_size) or die('申请失败'); } function __get($name) { $buf = shmop_read($this->shm_id, 0, $this->shm_size); $buf = unserialize(trim($buf)); if($name == '_all') return $buf; return isset($buf[$name]) ? $buf[$name] : false; } function __set($name, $value) { $buf = shmop_read($this->shm_id, 0, $this->shm_size); $buf = unserialize(trim($buf)); $buf[$name] = $value; $buf = serialize($buf); if(strlen($buf) >= $this->shm_size) die('空间不足'); shmop_write($this->shm_id, $buf, 0) or die('写入失败'); }}<br><font color="#e78608">------解决方案--------------------</font><br>和你上一个帖子一样,讨论是在基于 php_shmop.dll 扩展的<br><br>linux 中有另外的方法,但原理是一样的<br>php_shmop 也可以在 linux 中编译,但他却是为 window 设计的<br><br><font color="#e78608">------解决方案--------------------</font><br>我就明着告诉你,你这个问题大了.<br><br>共享内存区需要加锁操作, php没法设置进程共享的mutex, 你可以同样适用一个system v 的sem二值信号量来做锁.<div class="clear"> </div>