In what situations should comparison operators like == be used instead of assignment operators like = in PHP scripts?

Comparison operators like == should be used when you want to compare two values to see if they are equal. Assignment operators like = should be used when you want to assign a value to a variable. Using == instead of = in PHP scripts can prevent accidental assignment of values when you actually intended to compare them.

// Incorrect usage of assignment operator
$variable = 5; // Assigns the value 5 to $variable

// Correct usage of comparison operator
if ($variable == 5) { // Compares the value of $variable with 5
    echo "The variable is equal to 5";
}