What alternatives are available to make PHP scripts secure when processing external content?

When processing external content in PHP scripts, it is important to ensure the security of the application to prevent vulnerabilities such as code injection or cross-site scripting attacks. One way to make PHP scripts secure when processing external content is to sanitize and validate the input data before using it in the script. This can be done by using functions like `filter_var()` or `htmlspecialchars()` to filter out any potentially malicious content. 

// Sanitize and validate the input data
$input = $_POST['input'];
$sanitized_input = filter_var($input, FILTER_SANITIZE_STRING);

// Use the sanitized input in the script
echo "Processed input: " . $sanitized_input;

Keywords

input validation output encoding secure coding practices content filtering cross-site scripting (XSS)

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