PHP code example of avadim / math-executor

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

avadim / math-executor example snippets

$calculator = new \avadim\MathExecutor\MathExecutor();

print $calculator->execute('1 + 2 * (2 - (4+10))^2 + sin(10)');

// cascade execution - variable $_ has result of previous calculation
print $calculator
        ->calc('4+10')
        ->calc('1 + 2 * (2 - $_)^2')
        ->calc('$_ + sin(10)')
        ->getResult();

$calculator->setVars([
    'var1' => 0.15,
    'var2' => 0.22
]);

$calculator->execute('$var1 + $var2');

$calculator->loadExtra();

print $calculator->execute('if(100+20+3 > 111, 23, 34)');

$calculator->addFunction('hypotenuse', function($a, $b) {
    return sqrt($a ** 2 + $b ** 2);
}, 2);

print $calculator->execute('hypotenuse(3,4)');

use avadim\MathExecutor\Generic\AbstractToken;
use avadim\MathExecutor\Generic\AbstractTokenOperator;
use avadim\MathExecutor\Token\TokenScalarNumber;

class TokenOperatorModulus extends AbstractTokenOperator
{
    protected static $pattern = 'mod';

    /**
     * Priority of this operator (1 equals "+" or "-", 2 equals "*" or "/", 3 equals "^")
     * @return int
     */
    public function getPriority()
    {
        return 3;
    }

    /**
     * Association of this operator (self::LEFT_ASSOC or self::RIGHT_ASSOC)
     * @return string
     */
    public function getAssociation()
    {
        return self::LEFT_ASSOC;
    }

    /**
     * Execution of this operator
     * @param AbstractToken[] $stack Stack of tokens
     *
     * @return TokenScalarNumber
     */
    public function execute(&$stack)
    {
        $op2 = array_pop($stack);
        $op1 = array_pop($stack);
        $result = $op1->getValue() % $op2->getValue();

        return new TokenScalarNumber($result);
    }
}

$calculator = new avadim\MathExecutor\MathExecutor();
$calculator->addOperator('mod', '\TokenOperatorModulus');
echo $calculator->execute('286 mod 100');

$calculator->setIdentifiers([
    'ONE' => 1,
    'YEAR' => function($variables, $identifiers) { return date('Y'); },
]);

$calculator->execute('YEAR + ONE');