Answer
Output escaping prevents XSS by converting special characters using htmlspecialchars() or htmlentities().
Quick Answer
Output escaping converts special characters so they cannot be interpreted as code. htmlspecialchars() prevents XSS in HTML context. Use json_encode() when outputting JSON. For SQL use prepared statements. For shell commands use escapeshellarg(). Escape at output time in the correct context. Never trust user input in output without escaping. A missed escape can lead to XSS or injection attacks.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ