PHP code example of ailixter / gears-value

1. Go to this page and download the library: Download ailixter/gears-value library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

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

ailixter / gears-value example snippets


    use Ailixter\Gears\IntValue;
    use Ailixter\Gears\ValueInterface;

    class Positive extends IntValue
    {
        protected function validate()
        {
            if ($this->getValue() < 1) {
                $this->addError('value', 'is not positive');
            }
        }
    }

    function calculate(int $int): Positive
    {
        $result = new Positive($int * $int);
        if ($result->getValue() > 81) {
            $result->addError('value', 'too big');
        }
        return $result;
    }

    function readyForUnexpected(IntValue $int)
    {
        if ($int->getErrors()) {
            $result = 81;
        } else {
            $result = $int->getValue();
        }
        echo $result - 1;
    }

    function wantNoUnexpected(int $int)
    {
        echo $int - 1;
    }

    readyForUnexpected(calculate(8));       // 63
    readyForUnexpected(calculate(10));      // 80

    wantNoUnexpected(calculate(8)->get());  // 63

    try {
        wantNoUnexpected(calculate(10)->get()); // exception - too big
    } catch (Ailixter\Gears\Exceptions\ValueException $ve) {
        echo PHP_EOL, $ve->getMessage(), ': ';
        print_r($ve->getValue()->getErrors());
    }
    try {
        calculate(0);                      // exception - not positive
    } catch (Ailixter\Gears\Exceptions\ValueException $ve) {
        echo PHP_EOL, $ve->getMessage(), ': ';
        print_r($ve->getValue()->getErrors());
    }