我试图让php脚本的两个实例同时运行。我有一个脚本'test.php':
< p><?php echo time(); ?>睡觉...< / p为H. <?php sleep(5); ?> < p><?php echo time(); ?>完成< / p为H.如果我同时在两个浏览器选项卡中加载页面,我可以得到:
1446855680睡觉... 1446855685完成
和这个: $ b
1446855686睡觉...
1446855691完成
其中一个实例阻塞,直到其他加载。这在Firefox和Chromium上都会发生。
如果我制作第二个相同的脚本test2.php,或者将两个url重写为相同的脚本,
1446855862睡觉...
1446855867完成
以及:
1446855863睡觉... 1446855868完成
两个实例都在加载与此同时。因此,这是相同的URL被阻止。
如何获得具有相同URL的脚本的两个实例同时加载/运行?
解决方案正如VolkerK指出的那样,您的测试证实Firefox / Chrome按顺序对完全相同的 URL执行请求。但实际上这不是问题,因为用户通常不会加载同一页面两次,而对于向Ajax请求提供数据的脚本,由于不同的参数被附加,所以URL会有所不同。
如果你想绕过这个机制,你可以在URL中附加一个随机参数(在不同的浏览器标签中有所不同),即 url.to/your/script?urlID = 4821de7e524cf762deab6ed731343466 。随机参数使浏览器看到两个不同的URL,从而并行执行加载。
I'm trying to get two instances of a php script to run concurrently. I have a script, 'test.php':
<p><?php echo time(); ?> Sleeping...</p> <?php sleep(5); ?> <p><?php echo time(); ?> done</p>If I load the page in two browser tabs at the same time, I get this:
1446855680 Sleeping...
1446855685 done
and this:
1446855686 Sleeping...
1446855691 done
One instance blocks until the other loads. This happens on both Firefox and Chromium.
If I make a second identical script, 'test2.php', or rewrite two urls to the same script, and load the two pages in different tabs, I get this:
1446855862 Sleeping...
1446855867 done
and this:
1446855863 Sleeping...
1446855868 done
Both instances are loading at the same time. So it is identical URLs that are being blocked.
How can I get two instances of a script with the same URL to load/run at the same time?
解决方案As VolkerK pointed out and your testing confirmed Firefox/Chrome perform requests for the exact same URL in sequence. However in practice this is not a problem since Users usually do not load the same page twice, and for a script that serves data to Ajax requests the URLs will differ since different parameters are appended.
Should you want to bypass this mechanism in general you can append a random parameter (has to be different in the different browser tabs) to the url, i.e. url.to/your/script?urlID=4821de7e524cf762deab6ed731343466. The random parameter causes the browser to see two different URLs and thus to perform the load in parallel.
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