What are some common pitfalls when using multiple conditions in PHP if statements?

One common pitfall when using multiple conditions in PHP if statements is not properly handling the logical operators. It's important to understand how logical operators like && (AND), || (OR), and ! (NOT) work to ensure that the conditions are evaluated correctly. Another pitfall is not using parentheses to group conditions properly, which can lead to unexpected results. To avoid these pitfalls, make sure to use parentheses to group conditions logically and use the correct logical operators to combine multiple conditions.

// Example of using parentheses to group conditions properly
if (($condition1 && $condition2) || $condition3) {
    // Code block to execute if the conditions are met
}