PHP使用声明? a是什么? [英] PHP using Declare ? What is a tick?

问题描述

我对PHP函数declare有点困惑.

I am a little bit confused by the PHP function declare.

一个勾到底是什么?我以为一个勾号等于一行代码?

What exactly is a single tick? I thought a tick equals one line of code?

但是如果我使用:

function myfunc() {
        print "Tick";   
}

register_tick_function("myfunc");

declare(ticks=1) {
   echo 'foo!bar';
}

脚本打印:

滴答" 2次?

推荐答案

您会在每一行中打勾；和每个区块{} 尝试:

You get a tick for each line ; and each block {} Try that:

declare(ticks=1) echo 'foo!bar';

没有障碍，没有多余的勾号.

No block, no extra tick.

declare(ticks=1) {{ echo 'foo!bar'; }}

更多无关的块=更多的滴答声.

More extraneous blocks = more ticks.

PS:顺便说一句，tick是相当奇特的功能，它们仅在某些极其稀有情况下有用.它们不等同于线程或其他任何东西.如果对您来说，滴答声是解决问题的方法，那么您应该在另一个问题中发布有关您问题的信息，因为这可能不是解决问题的正确方法.

PS: by the way, ticks are quite the exotic feature and they're only useful in a few extremely rare situations. They are not equivalent to threading or anything. If, for you, ticks are the solution to a problem then you should post about your problem in another question because it's probably not the right solution to it.

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