ComplexParameter.php

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<?php
namespace Magento\Framework\Shell;

class ComplexParameter
{
    const DEFAULT_PATTERN = '/^\-\-%s=(.+)$/';

    private $name;

    private $pcre;

    public function __construct($name, $pattern = self::DEFAULT_PATTERN)
    {
        $this->name = $name;
        $this->pcre = sprintf($pattern, preg_quote($name, '/'));
    }

    public function getFromArray($input)
    {
        foreach ($input as $row) {
            $result = $this->getFromString($row);
            if ($result) {
                return $result;
            }
        }
        return [];
    }

    public function getFromString($string)
    {
        if (preg_match($this->pcre, $string, $matches)) {
            parse_str($matches[1], $result);
            return $result;
        }
        return [];
    }

    public function mergeFromArgv($server, array $into = [])
    {
        $result = $into;
        if (isset($server['argv'])) {
            $value = $this->getFromArray($server['argv']);
            $result = array_replace_recursive($into, $value);
        }
        return $result;
    }
}