What are some common pitfalls to avoid when processing user input from a <textarea> in PHP?

One common pitfall to avoid when processing user input from a <textarea> in PHP is not properly sanitizing the input to prevent malicious code injection, such as cross-site scripting (XSS) attacks. To solve this issue, you should use functions like htmlspecialchars() to escape special characters before displaying the input. 

// Sanitize user input from a &lt;textarea&gt;
$user_input = $_POST[&#039;textarea_input&#039;];
$sanitized_input = htmlspecialchars($user_input, ENT_QUOTES);

// Process the sanitized input
// Your code here

Keywords

XSS htmlspecialchars htmlentities validation sanitization

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