20 June 2025

Escaping HTML attribute values is critical for secure PHP development. You can use the htmlspecialchars function to escape HTML attribute values safely. This function converts special characters like quotes, angle brackets, and ampersands into their corresponding HTML entities. This prevents browsers from misinterpreting user input as HTML or JavaScript and helps protect against cross-site scripting (XSS) attacks.

Source code viewer
  1. $escaped = htmlspecialchars($userInput, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
  2. echo '<input value="' . $escaped . '">';
Programming Language: PHP