使用用户定义的函数搜索PHP数组的绝佳方法 [英] Elegant way to search an PHP array using a user-defined function

问题描述

基本上，我希望能够获得C ++的find_if()，Smalltalk的detect:等功能.

Basically, I want to be able to get the functionality of C++'s find_if(), Smalltalk's detect: etc.:

// would return the element or null
check_in_array($myArray, function($element) { return $elemnt->foo() > 10; });

但是我不知道有任何PHP函数可以做到这一点.我想出了一个近似值":

But I don't know of any PHP function which does this. One "approximation" I came up with:

$check = array_filter($myArray, function($element) { ... });
if ($check) 
    //...

其缺点是代码的目的尚不明确.另外，即使找到了元素，它也不会停止在数组上进行迭代，尽管这更像是nitpick(如果数据集足够大以至于会引起问题，则线性搜索将永远不是答案)

The downside of this is that the code's purpose is not immediately clear. Also, it won't stop iterating over the array even if the element was found, although this is more of a nitpick (if the data set is large enough to cause problems, linear search won't be an answer anyway)

推荐答案

您可以编写自己的函数;)

You can write your own function ;)

function callback_search ($array, $callback) { // name may vary
    return array_filter($array, $callback);
}

这似乎没什么用，但是它增加了语义并且可以提高可读性

This maybe seems useless, but it increases semantics and can increase readability

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