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Long Term Support Release

  • Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
  • Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/ -> mathslib.php (source)

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Differences Between: [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

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Copyright: Petr Skoda (skodak)
License: http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
File Size: 143 lines (5 kb)
Included or required:0 times
Referenced: 0 times
Includes or requires: 0 files

Defines 2 classes

calc_formula:: (2 methods):
  __construct()
  calc_formula()

name:: (5 methods):
  set_params()
  evaluate()
  get_error()
  localize()
  unlocalize()


Class: calc_formula  - X-Ref

This class abstracts evaluation of spreadsheet formulas.
See unit tests in lib/tests/mathslib_test.php for sample usage.

__construct($formula, $params=false)   X-Ref
Constructor for spreadsheet formula with optional parameters

param: string $formula with leading =
param: array $params associative array of parameters used in formula. All parameter names must be lowercase!

calc_formula($formula, $params=false)   X-Ref
Old syntax of class constructor. Deprecated in PHP7.


Class: name  - X-Ref

set_params($params)   X-Ref
Raplace parameters used in existing formula,
parameter names must contain only lowercase [a-z] letters, no other characters are allowed!

param: array $params associative array of parameters used in formula

evaluate()   X-Ref
Evaluate formula

return: mixed number if ok, false if error

get_error()   X-Ref
Get last error.
TODO: localize the strings from contructor and EvalMath library

return: mixed string with last error description or false if ok

localize($formula)   X-Ref
Similar to format_float, formats the numbers and list separators
according to locale specifics.

param: string $formula
return: string localised formula

unlocalize($formula)   X-Ref
Similar to unformat_float, converts floats and lists to PHP standards.

param: string $formula localised formula
return: string