What are some potential issues with the current PHP code for the number guessing game?

Issue: The current PHP code does not properly handle user input validation, leading to potential security vulnerabilities and unexpected behavior. To solve this issue, we can add input validation to ensure that the user input is within the expected range of values (1-100) and is a valid integer. 

// Validate user input for guess
$guess = isset($_POST['guess']) ? (int)$_POST['guess'] : null;

if ($guess < 1 || $guess > 100 || !is_numeric($guess)) {
    echo "Please enter a valid number between 1 and 100.";
    exit;
}

Keywords

syntax error random number generation input validation conditional statements error handling

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