Definition: PHP Secure Pages (PHPSP) is a security mechanism used in PHP web development to prevent cross-site scripting (XSS) attacks. It ensures that all user input fields, including HTML form elements, are not vulnerable to injection attacks from untrusted source code. It adds a layer of protection against XSS by checking if the value entered into the input field is within expected values or types. The security measure typically works through server-side validation and redirects to the attacker's page when an input doesn't match their expected format. This can help protect against common vulnerabilities in web applications such as SQL injection, buffer overflow attacks, and cross-site request forgery (CSRF) attempts.
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