The basic function of an operator is to do something with the value of a variable. That “something” can be to assign a value, change a value, or compare two or more values. Assignment operator ( = ) to assign values to your variables. There are other types of assignment operators, as well as other types of operators in general.
Here are the main types of PHP operators:
Assignment operators : Assign values to variables. Can also add to or subtract from a variable’s current value.
Arithmetic operators : Addition, subtraction, division, and multiplication occur when these operators are used.
Comparison operators : Compare two values and return either true or false. You can then perform actions
based on the returned value.
Logical operators : Determine the status of conditions