What are the potential pitfalls of using str_replace to handle special characters in PHP?

Using str_replace to handle special characters in PHP can be risky as it may not cover all possible special characters, leading to unexpected behavior or security vulnerabilities. It is recommended to use htmlspecialchars or htmlentities functions instead, which will properly encode special characters for HTML output.

// Using htmlspecialchars to handle special characters
$original_string = "This is a <b>bold</b> statement";
$safe_string = htmlspecialchars($original_string, ENT_QUOTES, 'UTF-8');
echo $safe_string;