The script will need to read user inputs, and verify them before any processing.
You should never trust the user and implement a few ways to correct him of his mistake,
leading him to provide a correct guess.
A mistake does not count as a try.
The script will read strings only composed of 4 numbers, removing blanks or spaces.
The codemaker will analyse a limited amount of codebreaker's guesses (10), providing either a win or a loose.
BONUS: You can implement a cheating word, resulting in an instant win, revealing the mystery code.
Here are some hints, but you really should try to find by yourself.
You can use iteration control structures such as:
You can use PHP built-in functions such as:
echo "Please guess a 4 digit number: ";
$input = fopen("php://stdin", "r");
$guess = fgets($input);
$guess = trim($guess);
$guess = str_replace(" ", "", $guess);
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