PHP TinyExpression

Math evaluation for strings.

TinyExpr Binding

TinyExpr Bindings for PHP

TinyExpr is a very small parser and evaluation library for evaluating math expressions from C

Installation

Linux

git clone --branch "master" --depth 1 https://github.com/MehrAlsNix/ext-tinyexpr.git /tmp/tinyexpression
cd /tmp/tinyexpression
phpize
./configure
make
make install
echo "extension=tinyexpression.so" > /usr/local/etc/php/conf.d/tinyexpression.ini

Windows

tbd.

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Functions

tinyexpr_interp

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(TinyExpression 0.1.0)

tinyexpr_interp - Evaluate math expressions from a string.

Description

tinyexpr_interp ( string $expr ) : float

Parameters

expr string

Return Values

Returns the evaluated math expression as a float.

Examples

docker-compose build
docker-compose up -d
docker-compose exec php bash

php -r "var_dump(tinyexpr_interp('2*9+8-(5/9)'));"
 
float(25.444444444444)

php -r "var_dump(tinyexpr_interp('sin(0.6)'));"
 
float(0.56464247339504)

Not parsable expressions will return NAN:

php -r "var_dump(tinyexpr_interp('(1+2'), is_nan(tinyexpr_interp('(1+2')));"
 
float(NAN)
bool(true)