A list of PHP Operator Types
The following operator types are available in PHP:
| 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 (true or false is returned) |
| Error Control | Affect error handling (several new ones in PHP5) |
| Execution | Cause execution of commands as though they were shell commands |
| Incrementing/Decrementing | Increment or decrement a variable |
| Logical | Boolean operators such as AND, OR, and NOT that can be used to include or exclude (more on this in Chapter 4) |
| String | Concatenates (joins together) strings |
| Array | Perform operations (such as append or split) on arrays |
An exhaustive list and reference for each operator aren’t provided here because that information is easily available online at www.php.net (just go to the site, click documentation, and you’ll find operators listed in the table of contents). When an operator is used in this book, though, some of its peculiarities are discussed.