What other common mistakes or pitfalls should beginners be aware of when working with PHP scripts that involve conditional statements like IF loops?

One common mistake beginners make when working with conditional statements in PHP scripts is forgetting to use double equals (==) for comparison inside IF loops. Using a single equals sign (=) will result in assignment instead of comparison, leading to unexpected behavior. To avoid this mistake, always use double equals (==) for comparison in IF statements.

// Incorrect comparison using single equals sign (=)
$number = 5;

if($number = 5) {
    echo "Number is 5";
}

// Correct comparison using double equals sign (==)
$number = 5;

if($number == 5) {
    echo "Number is 5";
}