PHP中关于flock的有关问题
PHP中关于flock的问题
关于flock的问题，我在博客上整体了下，http://www.shionco.com/archives/php_flock.html
例程代码：
$fd = fopen('./a.html', 'wb');
if ($fd) {
if (@flock($fd, LOCK_EX|LOCK_NB)) {
echo '未锁，打开文件并加锁';
sleep(10);
} else {
print '已锁，关闭文件';
}
fclose($fd);
} else {
echo '打开文件失败';
}
我在FF下，建立2个页面，打开第一个页面运行，独占锁定成功，进入延时状态，马上打开第2个页面运行，结果第2页发生阻塞，等到第1页运行结束，第2页也独占锁定成功，进入延时状态，执行完毕，明明使用了LOCK_NB，但并未发生独占锁定失败。无论是新建标签页或新窗口都会发生阻塞！
然而在IE下(我使用的是IE9，别的未测试)，同样的流程，第2页直接独占锁定失败，输出"已锁，关闭文件"；
如果是这样，FF的客户端大量浏览发生内容更新的缓存文件，岂不是都会阻塞？
------解决方案--------------------
你可以这样验证，再创建一个文件，包含上述代码
试着用标签式浏览器分别打开这两个文件，，，，看看是否达到你的需求。。如果是，就是上述原因
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