在 PHP 'switch' 语句中使用比较运算符

沃梦达教程 php问题

2022-01-01 3

Using comparison operators in a PHP #39;switch#39; statement(在 PHP switch 语句中使用比较运算符)

本文介绍了在 PHP 'switch' 语句中使用比较运算符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我需要经历四个条件，我认为最好在 PHP 中使用 switch 语句.但是，我需要检查一个整数是否小于等于，或者大于等于.

I have four conditions that I need to go through and I thought it would be best to use the switch statement in PHP. However, I need to check whether an integer is, let's say, less than or equal, or greater than and equal.

switch ($count) {
    case 20:
        $priority = 'low';
        break;

    case 40:
        $priority = 'medium';
        break;

    case 60:
        $priority = 'high';
        break;

    case 80:
        $priority = 'severe';
        break;
}

使用 if() 语句将如下所示:

With an if() statement it would look like the following:

if ($count <= 20) {
    $priority = 'low';
}

if ($count <= 40) {
    $priority = 'medium';
}

这在 switch-case 中可行吗?

推荐答案

解决这个问题的更一般的情况是:

A more general case for solving this problem is:

switch (true) {
    case $count <= 20:
        $priority = 'low';
        break;

    case $count <= 40:
        $priority = 'medium';
        break;

    case $count <= 60:
        $priority = 'high';
        break;

    default:
        $priority = 'severe';
        break;
}