Operators in PHP can be grouped into ten types, as follows:
| Type | Description |
|---|---|
| Arithmetic | Perform common arithmetical operations, such as addition and subtraction |
| Assignment | Assign values to variables |
| Bitwise | Perform operations on individual bits in an integer |
| Comparison | Compare values in a Boolean fashion and true or false is returned |
| Error Control | Affect error handling |
| Execution | Cause execution of commands as though they were shell commands |
| Incrementing/Decrementing | Increment or decrement a variable's value |
| Logical | Boolean operators such as and, or, and not that can be used to include or exclude |
| String | Concatenates strings |
| Array | Perform operations on arrays |