W3Schools Tryit Editor

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<!DOCTYPE html><html><body>​<?php$str = "Jane & 'Tarzan'";echo htmlspecialchars($str, ENT_COMPAT); // Will only convert double quotesecho "<br>";echo htmlspecialchars($str, ENT_QUOTES); // Converts double and single quotesecho "<br>";echo htmlspecialchars($str, ENT_NOQUOTES); // Does not convert any quotes?>​</body></html>​