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[Utility & Helpers](/categories/utility) 4. / 5. 3nr1c/php-shunting-yard ActiveLibrary[Utility & Helpers](/categories/utility) 3nr1c/php-shunting-yard ======================= php-shunting-yard 0.1.1(10y ago)01.3k↓100%MITPHPPHP >=5.3.3 Since Nov 26Pushed 10y ago1 watchersCompare [ Source](https://github.com/3nr1c/shunt)[ Packagist](https://packagist.org/packages/3nr1c/php-shunting-yard)[ Docs](https://github.com/3nr1c/php-shunting-yard)[ RSS](/packages/3nr1c-php-shunting-yard/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (2)Dependencies (1)Versions (4)Used By (0) PHP Shunting Yard Implementation -------------------------------- [](#php-shunting-yard-implementation) ### Example [](#example) Simple equation parsing ``` use RR\Shunt\Parser; $equation = '3 + 4 * 2 / ( 1 - 5 ) ^ 2 ^ 3'; $result = Parser::parse($equation); echo $result; //3.0001220703125 ``` Equation with constants and functions ``` use RR\Shunt\Parser; use RR\Shunt\Context; $ctx = new Context(); $ctx->def('abs'); // wrapper for PHP "abs" function $ctx->def('foo', 5); // constant "foo" with value "5" $ctx->def('bar', function($a, $b) { return $a * $b; }); // define function $equation = '3 + bar(4, 2) / (abs(-1) - foo) ^ 2 ^ 3'; $result = Parser::parse($equation, $ctx); echo $result; //3.0001220703125 ``` Test a condition ``` use RR\Shunt\Parser; use RR\Shunt\Context; $ctx = new Context(); $ctx->def('foo', 5); // constant "foo" with value "5" $equation = '(foo > 3) & (foo < 6)'; $result = Parser::parse($equation, $ctx); echo $result; //true ``` Re-run parsed expression on multiple inputs ``` use RR\Shunt\Parser; use RR\Shunt\Context; $counter = 1; $ctx = new Context(); $ctx->def('data', function() { global $counter; return $counter++; }); // define function $ctx->def('bar', function($a) { return 2*$a; }); // define function $equation = 'bar(data())'; $parser = new Parser(new Scanner($equation)); $result = $parser->reduce($this->ctx); // first result echo $result; // 2 $result = $parser->reduce($this->ctx); // second result echo $result; // 4 ``` ### Authors [](#authors) Originally source code taken from , some changes from: - - - Test cases and refactoring for composer/packagist by . ### Installation Via Composer [](#installation-via-composer) Define the following requirement in your composer.json file: ``` { "require": { "andig/php-shunting-yard": "dev-master" } } ``` Class loading ``` require_once "vendor/autoload.php"; ``` ### Manual Installation [](#manual-installation) Class loading ``` require_once "RR/Shunt/Context.php"; require_once "RR/Shunt/Parser.php"; require_once "RR/Shunt/Scanner.php"; require_once "RR/Shunt/Token.php"; require_once "RR/Shunt/Exception/ParseError.php"; require_once "RR/Shunt/Exception/RuntimeError.php"; require_once "RR/Shunt/Exception/SyntaxError.php"; ``` ### MIT Licence [](#mit-licence) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ### Health Score 26 — LowBetter than 43% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity15 Limited adoption so far Community13 Small or concentrated contributor base Maturity50 Maturing project, gaining track record Bus Factor2 2 contributors hold 50%+ of commits How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~0 days Total 2 Last Release 3901d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/3c0b0a85842eb5ce5556f8ac0284d703f5eec4310a42bd1c7e40828d11fadce9?d=identicon)[3nr1c](/maintainers/3nr1c) --- Top Contributors [![andig](https://avatars.githubusercontent.com/u/184815?v=4)](https://github.com/andig "andig (17 commits)")[![sergej-kurakin](https://avatars.githubusercontent.com/u/196096?v=4)](https://github.com/sergej-kurakin "sergej-kurakin (15 commits)")[![falahati](https://avatars.githubusercontent.com/u/2479372?v=4)](https://github.com/falahati "falahati (10 commits)")[![pmishev](https://avatars.githubusercontent.com/u/5188763?v=4)](https://github.com/pmishev "pmishev (10 commits)")[![3nr1c](https://avatars.githubusercontent.com/u/1206574?v=4)](https://github.com/3nr1c "3nr1c (4 commits)")[![dmromanov](https://avatars.githubusercontent.com/u/299059?v=4)](https://github.com/dmromanov "dmromanov (1 commits)") --- Tags mathshunting yardequation ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/3nr1c-php-shunting-yard/health.svg) ``` [![Health](https://phpackages.com/badges/3nr1c-php-shunting-yard/health.svg)](https://phpackages.com/packages/3nr1c-php-shunting-yard) ``` ### Alternatives [brick/math Arbitrary-precision arithmetic library 2.1k504.0M277](/packages/brick-math)[markrogoyski/math-php Math Library for PHP. 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