What are some common pitfalls when using PHP templates and blocks?

One common pitfall when using PHP templates and blocks is not properly escaping user input, which can lead to security vulnerabilities such as cross-site scripting (XSS) attacks. To solve this issue, always use functions like htmlspecialchars() to escape user input before outputting it to the template. 

// Incorrect way of outputting user input without escaping
echo $userInput;

// Correct way of outputting user input with escaping
echo htmlspecialchars($userInput, ENT_QUOTES, 'UTF-8');

Keywords

PHP templates blocks syntax errors variable scoping include statements

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