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Example code of zippovich2/expressions-parser

Informations about the package expressions-parser

Expressions Parser

Used shunting-yard algorithm to convert any expressions to RPN(Reverse Polish Notations) and process it.

Tests Packagist

Installation

composer require zippovich2/expressions-parser

Predefined parsers

Arithmetical expressions parser

Logical expressions parser

Extending

Custom parser

Operators

Types

  1. Operator::TYPE_LEFT_ASSOCIATIVE - left associative.
  2. Operator::TYPE_RIGHT_ASSOCIATIVE - right associative.
  3. Operator::TYPE_FUNCTION - function.
  4. Operator::TYPE_LEFT_ASSOCIATIVE - constant.

Reserved names

An operator cannot be created using the characters ( and ) because it is used for groups and , because it is used for separating function parameters.

Callbacks

You can provide callback for each operator or create global callback to handle all operators.

References

All versions of expressions-parser with dependencies

PHP Build Version
Package Version
Requires php Version >=7.3
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