What are common issues when trying to save HTML code in a longtext column in PHP?

When saving HTML code in a longtext column in PHP, common issues may include escaping special characters, handling single quotes, and dealing with line breaks. To solve these issues, you can use functions like htmlentities() to escape special characters, addslashes() to handle single quotes, and nl2br() to convert line breaks to HTML <br> tags before saving the HTML code to the database.

// Assuming $html contains the HTML code to be saved in the database

// Escape special characters
$html = htmlentities($html);

// Handle single quotes
$html = addslashes($html);

// Convert line breaks to <br> tags
$html = nl2br($html);

// Save the HTML code to the database
$query = "INSERT INTO table_name (html_column) VALUES ('$html')";
mysqli_query($connection, $query);