What are some potential pitfalls when trying to use switch with multiple variables in PHP?

When using switch with multiple variables in PHP, one potential pitfall is that switch statements only allow for a single expression to be evaluated. To work around this limitation, you can concatenate your variables into a single string or use a different control structure like if-else statements. 

// Concatenating variables into a single string
$var1 = 'foo';
$var2 = 'bar';

switch ($var1 . $var2) {
    case 'foobar':
        echo 'Match found!';
        break;
    default:
        echo 'No match found';
}

Keywords

switch statement multiple variables PHP syntax error unexpected behavior

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