如何计算 PHP 数组中的非空条目? [英] How to count non-empty entries in a PHP array?

问题描述

考虑:

[name] => Array ( [1] => name#1
                  [2] => name#2
                  [3] => name#3
                  [4] => name#4
                  [5] =>
                  [6] =>
                  [7] =>
                  [8] =>
                  [9] =>
                )


$name = $_POST['name']

我希望结果是 4.

count ($name) = 9
count (isset($name)) = 1
count (!empty($name)) = 1

我认为最后一个可以完成我需要的内容，但事实并非如此(空条目来自表单上未填写的输入).

I would think that last one would accomplish what I need, but it is not (the empty entries are from unfilled inputs on the form).

推荐答案

您可以使用 array_filter 只保留数组中真实"的值，如下所示:

You can use array_filter to only keep the values that are "truthy" in the array, like this:

array_filter($array);

如果您明确只想要非空，或者您的过滤器功能更复杂:

If you explicitly want only non-empty, or if your filter function is more complex:

array_filter($array, function($x) { return !empty($x); });
# function(){} only works in in php >5.3, otherwise use create_function

所以，只计算非空项目，就像你在每个项目上调用 empty(item) 一样:

So, to count only non-empty items, the same way as if you called empty(item) on each of them:

count(array_filter($array, function($x) { return !empty($x); }));

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