What are some best practices for comparing database column names with strings in PHP?

When comparing database column names with strings in PHP, it is important to ensure that the comparison is case-insensitive to avoid errors due to differences in casing. One way to achieve this is by using the strtolower() function to convert both the database column name and the string to lowercase before comparing them.

$columnName = "ColumnName";
$userInput = "columnname";

if(strtolower($columnName) === strtolower($userInput)) {
    echo "Column names match!";
} else {
    echo "Column names do not match.";
}