如何在PHP中创建循环模板 [英] How to create loop templates in php

问题描述

我们可以在C ++中定义循环模板，缩短编码时间：

As we can define loop templates in C++, for making coding shorter:

#define fo(a,b,c) for( a = ( b ); a < ( c ); ++ a )

有什么办法在PHP中做同样的事情？

Is there any way to do the same in PHP?

推荐答案

免责声明：嗯，预处理器宏，但由于PHP的动态性质，不需要/使用预处理器。但是，您可以在其他函数中包装函数，例如下面的示例。

Disclaimer: Well, this is not exactly preprocessor macro, but due to "dynamic" nature of PHP, preprocessors are not needed/used. Instead however, you are able to wrap functions in other functions, like in the example below.

是的，你可以通过创建自己的函数，回调。下面是示例：

Yes, you can do this by creating your own function that is being passed also a callback. Here is the example:

// FO function
function fo($b, $c, $callback) {
    for ($a = $b; $a < $c; ++$a) {
        $callback($a);
    }
}

// example of usage
fo(2,10, function($a){
    echo '['.$a.']';
});

上述代码在PHP 5.3中工作，并输出以下内容：

The above code works in PHP 5.3 and outputs the following:

[2][3][4][5][6][7][8][9]

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