v2.7.2

Update History.md

v2.7.0

• Optimized the algorithm
• Fixed parsing variables, e.g. 3 * 6x => Syntax error
• Updated: unit tests

v2.6.0

• Refactored: code to PHP 7.3.5
• Updated: composer.json
• Updated: readme

v2.5.0

• Improved the algorithm: it gets better with this release!
• Added: ability to override default valid variables, which will allow to set variables not only with the names x, y, z, a, b.
• Added: History.md
• Updated: readme

v2.4.0

• Improved: now several consecutive operators are available, e.g. 10/--++2
• Improved: a decimal number can be given as 1. or .1 which is equal to 1.0 or 0.1
• Added: constant Inf
• Added: processing of NaN
• Added: unit tests
• Fixed: PHP message "Notice: Undefined offset" in some cases
• Refactored: class properties and names of several methods
• Refactored: short syntax to arrays
• Updated: composer.json
• Updated: PHPDoc
• Updated: readme

v2.3.0

• Added: variables x, y, z, a, b
• Added: constant e
• Added: functions log, exp
• Added: namespace
• Added: composer.json
• Updated: PHPDoc
• Updated: readme

v2.2.0

• Added: functions sqrt, abs, sin, cos, tan
• Refactored: class properties
• Fixed: PHPDoc
• Updated: readme

v2.1.0

• Improved the algorithm: it gets better with this release!
• Improved: now spaces are allowed, like so: 8 + ( 10 * ( 3 + 5 ) ) / 2
• Added: numbers in E notation
• Added: constant pi
• Added: new validation rules