<?php $convertQ = function ($str) { if ('No' === $str || '0' == $str) { return 'no'; } if ('Yes' === $str || '1' == $str) { return 'yes'; } if ('Unsure' === $str) { return 'maybe'; } throw new \InvalidArgumentException('Unaccounted for value for questionnaire field: ' . $str); }; var_dump($convertQ(0)); // expect 'no', get 'no' var_dump($convertQ('No')); // expect 'no', get 'no' var_dump($convertQ(1)); // expect 'yes', get 'yes' var_dump($convertQ('Yes')); // expect 'yes', get 'yes' var_dump($convertQ('Unsure')); // expect 'maybe', get 'maybe' var_dump($convertQ('a')); // expect thrown error, get error thrown
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