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A program can not be executed without providing some informations to the user.
An elegant way to do it would be to use a function taking a message as parameter, displaying it to the user with some formatting.
Here are some hints, but you really should try to find by yourself.
Hints
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To display some informations, you can use PHP built-in functions such as:
Solution
Click to see a way to implement it
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<?php
function write(string $message)
{
fwrite(STDOUT, $message . PHP_EOL);
}
write("I am a first sentence.");
write("I am a second sentence.");
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