What are common pitfalls when using if...else statements in PHP?

One common pitfall when using if...else statements in PHP is forgetting to include the opening and closing curly braces for each block of code. This can lead to unexpected behavior and errors in your program. To avoid this, always remember to properly enclose the code within the if and else blocks with curly braces.

// Incorrect way (missing curly braces)
if ($condition)
    echo "Condition is true";
else
    echo "Condition is false";

// Correct way (with curly braces)
if ($condition) {
    echo "Condition is true";
} else {
    echo "Condition is false";
}