xmlwriter.php

См. документацию.

<?php
namespace Bitrix\Main;
 
class XmlWriter
{
    private $file = '';
    private $charset = '';
    private $tab = 0;
    private $f = null;
    private $lowercaseTag = false;
    private $errors = array();

    public function __construct(array $params)
    {
        if (isset($params['file']))
        {
            $server = \Bitrix\Main\Application::getInstance()->getContext()->getServer();
            $this->file = $server->getDocumentRoot() . trim($params['file']);
            // create new file
            if (
                isset($params['create_file']) &&
                $params['create_file'] === true &&
                is_writable($this->file)
            )
            {
                unlink($this->file);
            }
        }
        if (isset($params['charset']))
        {
            $this->charset = trim($params['charset']);
        }
        else
        {
            $this->charset = SITE_CHARSET;
        }
        if (isset($params['lowercase']) && $params['lowercase'] === true)
        {
            $this->lowercaseTag = true;
        }
        if (isset($params['tab']))
        {
            $this->tab = (int)$params['tab'];
        }
    }

    private function prepareTag($tag)
    {
        if ($this->lowercaseTag)
        {
            $tag = mb_strtolower($tag);
        }
        return $tag;
    }

    private function prepareValue($value)
    {
        $value = strtr(
                $value,
                array(
                    '<' => '&lt;',
                    '>' => '&gt;',
                    '"' => '&quot;',
                    '\'' => '&apos;',
                    '&' => '&amp;',
                )
            );
        $value = preg_replace('/[\x01-\x08\x0B-\x0C\x0E-\x1F]/', '', $value);
        return $value;
    }

    public function writeBeginTag($code)
    {
        if ($this->f)
        {
            fwrite($this->f, str_repeat("\t", $this->tab) . '<' . $this->prepareTag($code) . '>' . PHP_EOL);
            $this->tab++;
        }
    }

    public function writeEndTag($code)
    {
        if ($this->f)
        {
            $this->tab--;
            fwrite($this->f, str_repeat("\t", $this->tab) . '</' . $this->prepareTag($code) . '>' . PHP_EOL);
        }
    }

    public function writeFullTag($code, $value)
    {
        if ($this->f)
        {
            $code = $this->prepareTag($code);
            fwrite($this->f,
                            str_repeat("\t", $this->tab) .
                            (
                                trim($value) == ''
                                ? '<' . $code . ' />' . PHP_EOL
                                :   '<' . $code . '>' .
                                        $this->prepareValue($value) .
                                    '</' . $code . '>' . PHP_EOL
                            )
                    );
        }
    }

    private function addError($message, $code)
    {
        $this->errors[] = new Error($message, $code);
    }

    public function getErrors()
    {
        return $this->errors;
    }

    public function openFile()
    {
        if ($this->file == '')
        {
            $this->addError('File not accessible.', 'XML_FILE_NOT_ACCESSIBLE');
        }
        else
        {
            \CheckDirPath($this->file);
            $newFile = !file_exists($this->file);
            if (file_exists($this->file) && !is_writable($this->file))
            {
                chmod($this->file, BX_FILE_PERMISSIONS);
            }
            if (($this->f = fopen($this->file, 'ab')))
            {
                chmod($this->file, BX_FILE_PERMISSIONS);
                if ($newFile)
                {
                    fwrite($this->f, '<?xml version="1.0" encoding="'. $this->charset .'"?>' . PHP_EOL);
                }
            }
            else
            {
                $this->addError('File not accessible.', 'XML_FILE_NOT_ACCESSIBLE');
            }
        }
    }

    public function closeFile()
    {
        if ($this->f)
        {
            fclose($this->f);
        }
    }

    public function writeItem(array $item, $wrapperTag = '')
    {
        if ($wrapperTag != '')
        {
            $this->writeBeginTag($wrapperTag);
        }
        foreach ($item as $tag => $value)
        {
            if (is_array($value))
            {
                $this->writeItem($value, $tag);
            }
            else
            {
                $this->writeFullTag($tag, $value);
            }
        }
        if ($wrapperTag != '')
        {
            $this->writeEndTag($wrapperTag);
        }
    }
}