What is the purpose of filtering out PHP commands while keeping HTML tags intact in PHP code?

Filtering out PHP commands while keeping HTML tags intact in PHP code is important for security reasons, as it helps prevent potential code injection attacks. By filtering out PHP commands, only safe and expected input will be executed, reducing the risk of malicious code being executed on the server. This can be achieved by using functions like `htmlspecialchars()` to escape special characters in the input, ensuring that only HTML tags are processed by the server. 

<?php
$input = "<script>alert('Hello, World!');</script>";

// Filter out PHP commands and keep HTML tags intact
$safe_input = htmlspecialchars($input);

echo $safe_input;
?>

Keywords

filtering PHP commands HTML tags security input validation

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