<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Yaml;

use Symfony\Component\Yaml\Tag\TaggedValue;

/**
 * Dumper dumps PHP variables to YAML strings.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @final
 */
class Dumper
{
    /**
     * The amount of spaces to use for indentation of nested nodes.
     */
    private int $indentation;

    public function __construct(int $indentation = 4)
    {
        if ($indentation < 1) {
            throw new \InvalidArgumentException('The indentation must be greater than zero.');
        }

        $this->indentation = $indentation;
    }

    /**
     * Dumps a PHP value to YAML.
     *
     * @param mixed $input  The PHP value
     * @param int   $inline The level where you switch to inline YAML
     * @param int   $indent The level of indentation (used internally)
     * @param int   $flags  A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
     */
    public function dump(mixed $input, int $inline = 0, int $indent = 0, int $flags = 0): string
    {
        $output = '';
        $prefix = $indent ? str_repeat(' ', $indent) : '';
        $dumpObjectAsInlineMap = true;

        if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($input instanceof \ArrayObject || $input instanceof \stdClass)) {
            $dumpObjectAsInlineMap = empty((array) $input);
        }

        if ($inline <= 0 || (!\is_array($input) && !$input instanceof TaggedValue && $dumpObjectAsInlineMap) || empty($input)) {
            $output .= $prefix.Inline::dump($input, $flags);
        } elseif ($input instanceof TaggedValue) {
            $output .= $this->dumpTaggedValue($input, $inline, $indent, $flags, $prefix);
        } else {
            $dumpAsMap = Inline::isHash($input);

            foreach ($input as $key => $value) {
                if ('' !== $output && "\n" !== $output[-1]) {
                    $output .= "\n";
                }

                if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value) && false !== strpos($value, "\n") && false === strpos($value, "\r")) {
                    // If the first line starts with a space character, the spec requires a blockIndicationIndicator
                    // http://www.yaml.org/spec/1.2/spec.html#id2793979
                    $blockIndentationIndicator = (' ' === substr($value, 0, 1)) ? (string) $this->indentation : '';

                    if (isset($value[-2]) && "\n" === $value[-2] && "\n" === $value[-1]) {
                        $blockChompingIndicator = '+';
                    } elseif ("\n" === $value[-1]) {
                        $blockChompingIndicator = '';
                    } else {
                        $blockChompingIndicator = '-';
                    }

                    $output .= sprintf('%s%s%s |%s%s', $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', '', $blockIndentationIndicator, $blockChompingIndicator);

                    foreach (explode("\n", $value) as $row) {
                        if ('' === $row) {
                            $output .= "\n";
                        } else {
                            $output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
                        }
                    }

                    continue;
                }

                if ($value instanceof TaggedValue) {
                    $output .= sprintf('%s%s !%s', $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', $value->getTag());

                    if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value->getValue()) && false !== strpos($value->getValue(), "\n") && false === strpos($value->getValue(), "\r\n")) {
                        // If the first line starts with a space character, the spec requires a blockIndicationIndicator
                        // http://www.yaml.org/spec/1.2/spec.html#id2793979
                        $blockIndentationIndicator = (' ' === substr($value->getValue(), 0, 1)) ? (string) $this->indentation : '';
                        $output .= sprintf(' |%s', $blockIndentationIndicator);

                        foreach (explode("\n", $value->getValue()) as $row) {
                            $output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
                        }

                        continue;
                    }

                    if ($inline - 1 <= 0 || null === $value->getValue() || \is_scalar($value->getValue())) {
                        $output .= ' '.$this->dump($value->getValue(), $inline - 1, 0, $flags)."\n";
                    } else {
                        $output .= "\n";
                        $output .= $this->dump($value->getValue(), $inline - 1, $dumpAsMap ? $indent + $this->indentation : $indent + 2, $flags);
                    }

                    continue;
                }

                $dumpObjectAsInlineMap = true;

                if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \ArrayObject || $value instanceof \stdClass)) {
                    $dumpObjectAsInlineMap = empty((array) $value);
                }

                $willBeInlined = $inline - 1 <= 0 || !\is_array($value) && $dumpObjectAsInlineMap || empty($value);

                $output .= sprintf('%s%s%s%s',
                    $prefix,
                    $dumpAsMap ? Inline::dump($key, $flags).':' : '-',
                    $willBeInlined ? ' ' : "\n",
                    $this->dump($value, $inline - 1, $willBeInlined ? 0 : $indent + $this->indentation, $flags)
                ).($willBeInlined ? "\n" : '');
            }
        }

        return $output;
    }

    private function dumpTaggedValue(TaggedValue $value, int $inline, int $indent, int $flags, string $prefix): string
    {
        $output = sprintf('%s!%s', $prefix ? $prefix.' ' : '', $value->getTag());

        if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value->getValue()) && false !== strpos($value->getValue(), "\n") && false === strpos($value->getValue(), "\r\n")) {
            // If the first line starts with a space character, the spec requires a blockIndicationIndicator
            // http://www.yaml.org/spec/1.2/spec.html#id2793979
            $blockIndentationIndicator = (' ' === substr($value->getValue(), 0, 1)) ? (string) $this->indentation : '';
            $output .= sprintf(' |%s', $blockIndentationIndicator);

            foreach (explode("\n", $value->getValue()) as $row) {
                $output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
            }

            return $output;
        }

        if ($inline - 1 <= 0 || null === $value->getValue() || \is_scalar($value->getValue())) {
            return $output.' '.$this->dump($value->getValue(), $inline - 1, 0, $flags)."\n";
        }

        return $output."\n".$this->dump($value->getValue(), $inline - 1, $indent, $flags);
    }
}

• [D] Command
• [D] Exception
• [D] Resources
• [D] Tag
• [F] CHANGELOG.md
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• [F] composer.json
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• [F] Dumper.php
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• [F] Escaper.php
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• [F] Inline.php
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• [F] LICENSE
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• [F] Parser.php
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• [F] README.md
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• [F] Unescaper.php
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• [F] Yaml.php
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Encryption is a process that transforms data into a secure format, known as ciphertext, which can only be deciphered using a specific decryption key. This means that even if data is intercepted during transmission, it remains unreadable and protected from unauthorized access. Encryption is essential in safeguarding sensitive payment information, such as credit card details and personal data, during online transactions.
Tokenization, on the other hand, involves substituting sensitive data with unique identifiers or "tokens." These tokens serve as placeholders and have no value outside of the specific transaction context. If intercepted, tokens are meaningless and cannot be used to access the original sensitive data. This method significantly reduces the risk of fraud and data breaches, as the actual payment information is not stored or transmitted.
Together, encryption and tokenization form a powerful security framework. Encryption ensures that data is protected during transmission, while tokenization minimizes the risk of exposing sensitive information by replacing it with secure, non-sensitive tokens.
These technologies are integral to modern payment platforms, providing a robust defense against cyber threats. By implementing advanced encryption and tokenization techniques, businesses can enhance the security of digital transactions, ensuring that users' financial and personal information remains safe. This comprehensive approach not only builds user trust but also fortifies the overall security infrastructure of digital payment systems. As cyber threats evolve, the continued advancement of encryption and tokenization will be crucial in maintaining secure and reliable payment processes.

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