What is the function htmlspecialchars() used for in PHP and how does it relate to converting HTML tags?

The function htmlspecialchars() in PHP is used to convert special characters to their corresponding HTML entities. This is important to prevent security vulnerabilities such as cross-site scripting (XSS) attacks, where user input containing HTML tags could be executed as code. By using htmlspecialchars(), HTML tags are converted into their safe representations, ensuring that user input is displayed as text rather than executed as code. 

$user_input = "<script>alert('XSS attack!');</script>";
$safe_input = htmlspecialchars($user_input);
echo $safe_input;

Keywords

htmlspecialchars PHP function HTML tags conversion

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