PHP switch statement inside another switch statement

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忘了有多久
忘了有多久 2021-02-19 05:05

I have this situation where I have to check two GET variables. After checking the first one in one switch statement inside the statement, the second variable has to be checked i

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  • 2021-02-19 05:36

    I can't see any error in your code. I tried it on my machine and it works fine. As it also works fine for you, the error most be somewhere else.

    There's no reason why nested switch statements shouldn't be possible, as switch statements are defined as follows:

    switch($variable) {
      case "case1":
        [statement]
        break;
    }
    

    [statement] can be replaced by a simple command, such as echo "test";, a series of commands echo "test"; echo "test"; or another switch statement. Adding braces doesn't change anything, as these merely serve to group a series of commands - so that more than one command can be used for the then part in conditionals like if([condition]) [then]. The above answer, which surprisingly has 18 upvotes for wrongly advising you to add braces, doesn't change anything.

    To conclude, nested switch statements are possible and the way you used them in your code sample is correct. The error is somewhere else.

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  • 2021-02-19 05:45

    According to the PHP Documentation Examples, it is possible if the case block which contains the nested switch is enclose with braces.

    Follows the mentioned example.

    <?php 
        switch ($argc) { 
            case 'home': { 
                 print('This is $argc, home case.'); 
                break; 
            } 
            case 'subsection': { 
                    switch ($argd) { 
                         case 'links': { 
                                switch($arge) { 
                                    case 'display': { 
                                    print('This is $arge, subsection,links,display case.'); 
                                    break; 
                                    } 
                               } 
                        } 
                    } 
            } 
        } 
    ?>
    
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