What are the common mistakes to avoid when using logical operators in PHP?

Common mistakes to avoid when using logical operators in PHP include using the assignment operator "=" instead of the comparison operator "==" or "===" when checking conditions, not properly grouping conditions with parentheses, and misunderstanding the precedence of logical operators. To avoid these mistakes, always double-check the operators you are using, use parentheses to group conditions for clarity, and refer to the operator precedence table in the PHP documentation. Example:

// Incorrect: using assignment operator instead of comparison operator
$age = 25;
if ($age = 18) {
    echo "You are an adult";
}

// Correct: using comparison operator
$age = 25;
if ($age == 18) {
    echo "You are an adult";
}