PHP: else

Let's try and modify the function from the previous example so that it returns the whole strings of Sentence is normal or Sentence is question instead of just the sentence type.

<?php

function getTypeOfSentence($sentence)
{
    $lastChar = $sentence[-1];

    if ($lastChar === '?') {
        $sentenceType = 'question';
    } else {
        $sentenceType = 'normal';
    }

    return "Sentence is {$sentenceType}";
}

getTypeOfSentence('Hodor');  // Sentence is normal
getTypeOfSentence('Hodor?'); // Sentence is question

We added else and a new block with curly brackets. This block is only executed if the condition in if is false.

There are two ways to design an if-else clause. The negation allows you to change the order of the blocks:

<?php

function getTypeOfSentence($sentence)
{
    $lastChar = $sentence[-1];

    if ($lastChar !== '?') {
        $sentenceType = 'normal';
    } else {
        $sentenceType = 'question';
    }

    return "Sentence is {$sentenceType}";
}

Which way is preferable? It's easier for the human brain to reason in a straightforward manner rather than via negation. Try to pick a test that has no negations, and then modify the contents of the code blocks to suit it.

Instructions

Write a function, normalizeUrl(), that normalizes data passed to it. It takes a site address and returns it with https:// at the beginning.

The function accepts addresses as ADDRESS or http://ADDRESS, but always returns the address as https://ADDRESS

There are two possible solutions:

1. You can compare the first 7 characters of the argument string with the string http://.
2. You can use the strpos, function to check if the string-argument contains the substring http://.

And then it'll either add or not add https:// accordingly.

Call examples:

<?php

normalizeUrl('google.com');   // 'https://google.com'
normalizeUrl('http://ai.fi'); // 'https://ai.fi'