What are the potential drawbacks of using HTML entities in PHP functions like strip_tags and htmlentities?

Using HTML entities in PHP functions like strip_tags and htmlentities can lead to unexpected behavior or incorrect output. This is because these functions may not handle HTML entities properly, potentially resulting in security vulnerabilities or incorrect data processing. To avoid these issues, it's recommended to use the appropriate functions for handling HTML entities, such as htmlspecialchars or html_entity_decode. 

// Using htmlspecialchars to handle HTML entities properly
$unsafe_input = "<script>alert('XSS attack');</script>";
$safe_output = htmlspecialchars($unsafe_input, ENT_QUOTES, 'UTF-8');
echo $safe_output;

Keywords

HTML entities PHP functions strip_tags htmlentities security vulnerability

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