Question

我问这个问题要知道，还有其他最好的方法可以在最少的行中编写这个逻辑吗？

这是我的代码，包含很多if和elseif条件：

if ($emission <= 100 ) {
    $cssClass = "emission_a"; 
} elseif ($emission > 101 && $emission <= 120 ){
    $cssClass = "emission_b";
} elseif ($emission >= 121 && $emission <= 150 ){
    $cssClass = "emission_c";
} elseif ($emission >= 151 && $emission <= 165 ){
    $cssClass = "emission_d";
} elseif ($emission >= 166 && $emission <= 185 ){
    $cssClass = "emission_e";
} elseif ($emission >= 186 && $emission <= 125 ){
    $cssClass = "emission_f";
} elseif ($emission >= 226){
    $cssClass = "emission_g";
}

希望有人可以帮助我。谢谢。

Answer 1

如果简化了条件，你可以省去一些字符，但是你需要相同数量的if / elseif语句

Array
(
    [0] => one
    [1] => two
    [2] => group1,three
    [3] => group1,four
    [4] => group2,five
    [5] => group3,six
)

或者你尝试使用像这样的映射数组

<?php

if ($emission <= 100 ) {
    $cssClass = "emission_a"; 
} elseif ($emission <= 120 ) {
    $cssClass = "emission_b";
} elseif ($emission <= 150 ) {
    $cssClass = "emission_c";
} elseif ($emission <= 165 ) {
    $cssClass = "emission_d";
} elseif ($emission <= 185 ) {
    $cssClass = "emission_e";
} else {
    $cssClass = "emission_g";
} 

// this one makes no sense, maybe a typo?
// } elseif ($emission >= 186 && $emission <= 125 ){

如何以最有用的方式编写这种逻辑？

1 个答案: