What are some common pitfalls to avoid when adjusting PHP scripts to accommodate varying input data lengths, such as postal codes?

When adjusting PHP scripts to accommodate varying input data lengths, such as postal codes, common pitfalls to avoid include assuming a fixed length for the input data, not validating the input data length, and not properly sanitizing the input data. To solve this issue, you should dynamically check and validate the length of the input data to ensure it meets the required criteria. 

// Example PHP code snippet to validate a postal code with a minimum length of 5 characters and a maximum length of 10 characters

$postal_code = $_POST['postal_code'];

if(strlen($postal_code) < 5 || strlen($postal_code) > 10) {
    echo "Postal code must be between 5 and 10 characters long.";
} else {
    // Process the valid postal code
}

Keywords

Data validation string manipulation regular expressions error handling input sanitization

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