PHP 计数数组元素

2021-12-30 00:00:00 arrays count php

有人可以解释为什么这会返回一个数组由 0 个元素组成".:

hi can someone explain why this would return "An array consists of 0 elements." :

$arr = array(1,3,5); 
$count = count($arr); 
if ($count = 0) { echo "An array is empty."; } else { echo "An array has $count elements."; }

顺便说一下，这是我正在做的一个测验，我不确定为什么这是正确答案?

By the way, this is one a quiz i'm working through and i'm not sure why this is the correct answer?

推荐答案

您在条件语句中将 $count 赋值为 0

You are assigning $count to 0 in your conditional statement

代替...

if ($count = 0)

这样做

if ($count === 0)

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