What are the best practices for handling ASCII characters within the range of 32 to 126 in PHP?

When handling ASCII characters within the range of 32 to 126 in PHP, it is important to sanitize and validate user input to prevent any potential security vulnerabilities such as SQL injection or cross-site scripting attacks. One common approach is to use functions like `htmlspecialchars()` or `filter_var()` with the `FILTER_SANITIZE_STRING` filter to ensure that only valid ASCII characters are accepted. 

// Example of sanitizing user input within the ASCII range of 32 to 126
$user_input = $_POST['user_input'];

// Sanitize user input
$clean_input = filter_var($user_input, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);

// Use the sanitized input in your application
echo "Sanitized input: " . $clean_input;

Keywords

ASCII characters character encoding PHP functions string manipulation sanitization

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