: Rejecting any input that contains SQL keywords like UNION , SELECT , or comments ( -- ).
: This is a SQL comment symbol. It tells the database to ignore everything that follows it, effectively neutralizing the rest of the original, legitimate code.
: Using parameterized queries ensures the database treats input as literal text, never as executable code.
: This is likely a "fingerprint" or a unique string used by automated scanning tools (like SQLmap) to identify if the injected code was successfully processed. The "Essay" of a Vulnerability
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