在开关php中使用strstr [英] Using strstr inside a switch php

问题描述

我只是想不出代码.我想将要更改为switch语句的陈述太多了，但我找不到逻辑.

I just cannot think of the code. I have waay too many if statments which I want to change to be a switch statement, but I cannot find of the logic.

目前，我有:

if(strstr($var,'texttosearch'))
   echo 'string contains texttosearch';

if(strstr($var,'texttosearch1'))
   echo 'string contains texttosearch1';

if(strstr($var,'texttosearch2'))
   echo 'string contains texttosearc2h';

//etc etc...

但是我如何在交换机内实现相同的目标?

But how can I achieve the same within a switch?

推荐答案

switch (true) {
  case strstr($var,'texttosearch'):
    echo 'string contains texttosearch';
    break;
  case strstr($var,'texttosearch1'):
    echo 'string contains texttosearch1';
    break;
  case strstr($var,'texttosearch2'):
    echo 'string contains texttosearc2h';
    break;
}

请注意，这与您自己的解决方案略有不同，因为switch语句将不会针对其他case进行测试(如果已匹配更早的版本)，而是因为您使用了单独的if如果if-else您的方式总是针对每种情况进行测试.

Note, that this is slightly different to your own solution, because the switch-statement will not test against the other cases, if an earlier already matches, but because you use separate ifs, instead if if-else your way always tests against every case.

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