How can PHP developers avoid common errors when manipulating text content that includes HTML tags and line breaks?

When manipulating text content that includes HTML tags and line breaks, PHP developers can avoid common errors by using functions like htmlspecialchars() to escape special characters in the text and nl2br() to convert newline characters to HTML line breaks. This ensures that the HTML tags are not inadvertently broken or misinterpreted during manipulation.

$text = "<p>This is a paragraph with <strong>bold</strong> text.</p>\nNew line.";
$escaped_text = htmlspecialchars($text);
$processed_text = nl2br($escaped_text);

echo $processed_text;