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PHP Quick Scripting Reference by Mikael Olsson

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CHAPTER 3

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Operators

Operators are used to operate on values. They can be grouped into five types: arithmetic, assignment, comparison, logical and bitwise operators.

Arithmetic operators

The arithmetic operators include the four basic arithmetic operations, as well as the modulus operator (%) which is used to obtain the division remainder.

$x = 4 + 2; // 6 // addition$x = 4 - 2; // 2 // subtraction$x = 4 * 2; // 8 // multiplication$x = 4 / 2; // 2 // division$x = 4 % 2; // 0 // modulus (division remainder)

Assignment operators

The second group is the assignment operators. Most importantly, the assignment operator (=) itself, which assigns a value ...

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