How can line breaks in input data affect PHP code execution?

Line breaks in input data can potentially lead to unintended behavior in PHP code execution, especially when dealing with functions like `eval()` or when parsing data. To mitigate this risk, it is important to sanitize and validate input data to ensure it does not contain any malicious line breaks or other unexpected characters. 

// Sanitize input data to remove any line breaks
$input = str_replace(array("\r", "\n"), '', $input);

// Validate input data before using it in PHP code
if (/* validation condition */) {
    // Proceed with using the sanitized input data
} else {
    // Handle invalid input data
}

Keywords

line breaks input data PHP code execution security vulnerability data validation

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