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Variables are simply containers for information. In order to do anything useful with them, you need Operators .
Operators are symbols that tell the PHP processor to perform certain actions.
For example, the addition(+) symbol is an Operators that tells PHP to add two variables or values, while the greater-than(>) symbol is an Operators that tells PHP to compare two values.
PHP supports more than 50 such Operators , ranging from operators for arithmetical operations to operators for logical comparison and bitwise calculations.
This section discusses the most commonly used Operators .