如何计算在PHP数组非空条目？

问题描述

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


$name = $_POST['name']

我想要的结果是 4 。

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

我认为，最后一个会完成我需要什么，而不是。 （空项是从形式空缺输入）

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

推荐答案

您可以使用，只保留该数组中的非空值，如：

You can use array_filter to only keep the values that are non-empty in the array, like this:

array_filter($array);

或者，如果你的过滤功能较为复杂：

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，只计算非空的：

So, to count only non-empty:

count(array_filter($array));

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