What is the difference between == and === in PHP?

In PHP, the '==' operator is used for comparison and checks if the values on the left and right sides of the operator are equal, while the '===' operator is used for identical comparison and checks if the values and data types on both sides are exactly the same.

When to use ==?

Use the '==' operator when you only want to compare the values and you are not concerned with the data types being equal. It will perform type coercion if necessary.

When to use ===?

Use the '===' operator when you want to ensure that both the values and data types are identical. It will not perform type coercion, so the comparison will be more strict and accurate.