How can syntax errors be avoided when using PHP functions like number_format()?

Syntax errors when using PHP functions like number_format() can be avoided by ensuring that the function is used correctly with the appropriate parameters. This includes providing the correct number of arguments and ensuring that they are of the correct data type. Additionally, it is important to pay attention to the placement of parentheses and commas within the function call to avoid syntax errors.

$number = 123456.789;
$formatted_number = number_format($number, 2, '.', ',');
echo $formatted_number;