Are there best practices for handling special characters like "&" in PHP input processing?

Special characters like "&" in PHP input processing can cause issues such as SQL injection or XSS attacks if not properly handled. To mitigate this, it is recommended to sanitize and validate input data before using it in any database queries or outputting it to the browser. One way to do this is by using PHP's htmlspecialchars() function to convert special characters into their HTML entities, making them safe to display on a webpage. 

$input = $_POST['input']; // assuming input is coming from a form submission
$clean_input = htmlspecialchars($input, ENT_QUOTES, 'UTF-8');
// now $clean_input can be safely used in database queries or echoed to the browser

Keywords

PHP special characters input processing htmlentities htmlspecialchars

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