<?php
/*
* By adding type hints and enabling strict type checking, code can become
* easier to read, self-documenting and reduce the number of potential bugs.
* By default, type declarations are non-strict, which means they will attempt
* to change the original type to match the type specified by the
* type-declaration.
*
* In other words, if you pass a string to a function requiring a float,
* it will attempt to convert the string value to a float.
*
* To enable strict mode, a single declare directive must be placed at the top
* of the file.
* This means that the strictness of typing is configured on a per-file basis.
* This directive not only affects the type declarations of parameters, but also
* a function's return type.
*
* For more info review the Concept on strict type checking in the PHP track
* <link>.
*
* To disable strict typing, comment out the directive below.
*/
declare(strict_types=1);
function distance(string $strandA, string $strandB): int
{
return count(array_diff(str_split($strandA), str_split($strandB)));
}
Gives this output:
{"version"=>2, "tests"=>[{"name"=>"testNoDifferenceBetweenIdenticalStrands", "status"=>"fail", "message"=>"HammingTest::testLargeHammingDistance\nFailed asserting that 0 matches expected 4.\n\n/mnt/exercism-iteration/HammingTest.php:61HammingTest::testHammingDistanceInVeryLongStrand\nFailed asserting that 0 matches expected 9.\n\n/mnt/exercism-iteration/HammingTest.php:66HammingTest::testExceptionThrownWhenStrandsAreDifferentLength\nFailed asserting that exception of type \"InvalidArgumentException\" is thrown.", "output"=>""}], "status"=>"pass"}
Top-level status is
pass
when testsfail
This code:
Gives this output: