What are the common pitfalls when using if-else loops in PHP?

One common pitfall when using if-else loops in PHP is forgetting to include the curly braces {} around the code block for each condition. This can lead to unexpected behavior or errors in the code. To avoid this issue, always use curly braces to encapsulate the code block for each condition in an if-else statement.

// Incorrect way without curly braces
if ($condition)
    echo "Condition is true";
    echo "This line will always be executed";

// Correct way with curly braces
if ($condition) {
    echo "Condition is true";
}
echo "This line will only be executed if the condition is false";