jamesgerat / exprlib
An expression parser in PHP
1.5.1
2024-02-01 13:01 UTC
Requires
- php: >=7.3
Requires (Dev)
- atoum/atoum: 4.0.0
README
For migration from thesoftwarefarm/exprlib and another fork need:
- replace var format from "{{a}}" to "[a]"
- up php to 7.3
An expression parser in PHP, code inspired from codehackit
An alternative to this is Hoa/Math
List of functions and features:
- operators = * + - ^ !=
- acos
- cos
- sin
- tan
- round
- pow
- sqrt
- log
- exp
- sum
- avg
- min
- max
- if (condition, than, else)
- var placing with [varName]
Examples:
<?php // simple math exprlib\Parser::build('2+1')->evaluate(); // 3 exprlib\Parser::build('2/1')->evaluate(); // 2 exprlib\Parser::build('2/(3.6*8.5)')->evaluate(); // 0.06536 exprlib\Parser::build('2+(6/2)+(8*3)')->evaluate(); // 29 exprlib\Parser::build('2+3+6+6/2+3')->evaluate(); // 17 exprlib\Parser::build('0.001 + 0.02')->evaluate(); // 0.021 exprlib\Parser::build("100 - 80 - 90 + 100")->evaluate();//30 // functions exprlib\Parser::build('COS(0)')->evaluate(); // 1 exprlib\Parser::build('cos(90)')->evaluate(); // 0 exprlib\Parser::build('cos(180)')->evaluate(); // -1 exprlib\Parser::build('cos(360)')->evaluate(); // 1 exprlib\Parser::build('sin(0)')->evaluate(); // 0 exprlib\Parser::build('sin(90)')->evaluate(); // 1 exprlib\Parser::build('sin(180)')->evaluate(); // 0 exprlib\Parser::build('sqrt(9)')->evaluate(); // 3 exprlib\Parser::build('sqrt(4)')->evaluate(); // 2 exprlib\Parser::build('sqrt(3)')->evaluate(); // 1.73205 exprlib\Parser::build('tan(180)')->evaluate(); // 0 exprlib\Parser::build('log(10)')->evaluate(); // '1' exprlib\Parser::build('log(10,10)')->evaluate(); // '1' exprlib\Parser::build('ln(10)')->evaluate(); // '2.30259' exprlib\Parser::build('log(0.7)')->evaluate(); // '-0.1549' exprlib\Parser::build('ln(0.7)')->evaluate(); // '-0.35667' exprlib\Parser::build('pow(10, 2)')->evaluate(); // 100 exprlib\Parser::build('pow(10, 3)')->evaluate(); // 1000 exprlib\Parser::build('pow(10, 0)')->evaluate(); // 1 exprlib\Parser::build('exp(12)')->evaluate(); // 162754.79142 exprlib\Parser::build('exp(5.7)')->evaluate(); // 298.8674 exprlib\Parser::build('sum(10, 20, 30)')->evaluate(); // 60 exprlib\Parser::build('avg(10, 20, 30)')->evaluate(); // 20 exprlib\Parser::build('log(0)')->evaluate(); // -INF exprlib\Parser::build('log(0)*-1')->evaluate(); // INF exprlib\Parser::build(sprintf('acos(%s)', rad2deg(8)))->evaluate(); // NAN exprlib\Parser::build('round(2.555,0)')->evaluate(); // 3 exprlib\Parser::build('round(2.555,1)')->evaluate(); // 2.6 exprlib\Parser::build('round(222.555,-1)')->evaluate(); // 220 exprlib\Parser::build('round(225.555,-1)')->evaluate(); // 230 // min-max exprlib\Parser::build('max(10,20,30)')->evaluate(); // 30 exprlib\Parser::build('min(10,20,30)')->evaluate(); // 10 // if-elsing exprlib\Parser::build('if(1=1, 1, 0)')->evaluate(); // 1 exprlib\Parser::build('if(1<2, 1, 0)')->evaluate(); // 0 exprlib\Parser::build('if(1>2, 1, 0)')->evaluate(); // 0 // var placing exprlib\Parser::build('[a]+1')->setVars(['a' => 3])->evaluate(); // 4 exprlib\Parser::build('[a]-[b]')->setVars(['a' => 2, 'b' => 5])->evaluate(); // -3 // var placing with if-elsing exprlib\Parser::build('if([a]=5, 1, 0)')->setVars(['a' => 5])->evaluate(); // 1 exprlib\Parser::build('if([a]>[b], 1, 0)')->setVars(['a' => 3, 'b' => 2])->evaluate(); // 1
Launch tests
Look at .travis.yml
Todo
- Look at how is the best way to decouple Scope
- Add tests