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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 10 |
1 files changed, 7 insertions, 3 deletions
@@ -3,7 +3,7 @@ # A simple and extensible math expressions calculator ## Features: -* Built in support for +, -, *, / and power (^) operators +* Built in support for +, -, *, %, / and power (^) operators * Paratheses () and arrays [] are fully supported * Logical operators (==, !=, <, <, >=, <=, &&, ||) * Built in support for most PHP math functions @@ -101,7 +101,7 @@ $executor->calculate('avarage(1, 3, 4, 8)'); // 4 ``` ## Operators: -Default operators: `+ - * / ^` +Default operators: `+ - * / % ^` Add custom operator to executor: @@ -111,7 +111,7 @@ use NXP\Classes\Operator; $executor->addOperator(new Operator( '%', // Operator sign false, // Is right associated operator - 170, // Operator priority + 180, // Operator priority function (&$stack) { $op2 = array_pop($stack); @@ -189,6 +189,10 @@ $calculator->setVarNotFoundHandler( ); ``` +## Floating Point BCMath Support +By default, `MathExecutor` uses PHP floating point math, but if you need a fixed precision, call **useBCMath()**. Precision defaults to 2 decimal points, or pass the required number. +`WARNING`: Functions may return a PHP floating point number. By doing the basic math functions on the results, you will get back a fixed number of decimal points. Use a plus sign in from of any stand alone function to return the proper number of decimal places. + ## Division By Zero Support: Division by zero throws a `\NXP\Exception\DivisionByZeroException` by default ```php |