Subversion-Projekte lars-tiefland.php_share

<?php

/**

 * PHPUnit

 *

 * Copyright (c) 2002-2010, Sebastian Bergmann <sb@sebastian-bergmann.de>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   * Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   * Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in

 *     the documentation and/or other materials provided with the

 *     distribution.

 *

 *   * Neither the name of Sebastian Bergmann nor the names of his

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * @category   Testing

 * @package    PHPUnit

 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>

 * @copyright  2002-2010 Sebastian Bergmann <sb@sebastian-bergmann.de>

 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License

 * @link       http://www.phpunit.de/

 * @since      File available since Release 3.2.0

 */

require_once 'PHPUnit/Util/Filter.php';

PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');

/**

 * XML helpers.

 *

 * @category   Testing

 * @package    PHPUnit

 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>

 * @copyright  2002-2010 Sebastian Bergmann <sb@sebastian-bergmann.de>

 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License

 * @version    Release: 3.4.15

 * @link       http://www.phpunit.de/

 * @since      Class available since Release 3.2.0

 */

class PHPUnit_Util_XML

{

    /**

     * @param  string $string

     * @return string

     * @author Kore Nordmann <mail@kore-nordmann.de>

     * @since  Method available since Release 3.4.6

     */

    public static function prepareString($string)

    {

        return preg_replace(

          '([\\x00-\\x04\\x0b\\x0c\\x0e-\\x1f\\x7f])e',

          'sprintf( "&#x%02x;", ord( "\\1" ) )',

          htmlspecialchars(

            self::convertToUtf8($string), ENT_COMPAT, 'UTF-8'

          )

        );

    }

    /**

     * Converts a string to UTF-8 encoding.

     *

     * @param  string $string

     * @return string

     * @since  Method available since Release 3.2.19

     */

    protected static function convertToUtf8($string)

    {

        if (!self::isUtf8($string)) {

            if (function_exists('mb_convert_encoding')) {

                $string = mb_convert_encoding($string, 'UTF-8');

            } else {

                $string = utf8_encode($string);

            }

        }

        return $string;

    }

    /**

     * Checks a string for UTF-8 encoding.

     *

     * @param  string $string

     * @return boolean

     * @since  Method available since Release 3.3.0

     */

    protected static function isUtf8($string)

    {

        $length = strlen($string);

        for ($i = 0; $i < $length; $i++) {

            if (ord($string[$i]) < 0x80) {

                $n = 0;

            }

            else if ((ord($string[$i]) & 0xE0) == 0xC0) {

                $n = 1;

            }

            else if ((ord($string[$i]) & 0xF0) == 0xE0) {

                $n = 2;

            }

            else if ((ord($string[$i]) & 0xF0) == 0xF0) {

                $n = 3;

            }

            else {

                return FALSE;

            }

            for ($j = 0; $j < $n; $j++) {

                if ((++$i == $length) || ((ord($string[$i]) & 0xC0) != 0x80)) {

                    return FALSE;

                }

            }

        }

        return TRUE;

    }

    /**

     * Loads an XML (or HTML) file into a DOMDocument object.

     *

     * @param  string  $filename

     * @param  boolean $isHtml

     * @return DOMDocument

     * @since  Method available since Release 3.3.0

     */

    public static function loadFile($filename, $isHtml = FALSE)

    {

        $reporting = error_reporting(0);

        $contents  = file_get_contents($filename);

        error_reporting($reporting);

        if ($contents === FALSE) {

            throw new PHPUnit_Framework_Exception(

              sprintf(

                'Could not read "%s".',

                $filename

              )

            );

        }

        return self::load($contents, $isHtml, $filename);

    }

    /**

     * Load an $actual document into a DOMDocument.  This is called

     * from the selector assertions.

     *

     * If $actual is already a DOMDocument, it is returned with

     * no changes.  Otherwise, $actual is loaded into a new DOMDocument

     * as either HTML or XML, depending on the value of $isHtml.

     *

     * Note: prior to PHPUnit 3.3.0, this method loaded a file and

     * not a string as it currently does.  To load a file into a

     * DOMDocument, use loadFile() instead.

     *

     * @param  string|DOMDocument  $actual

     * @param  boolean             $isHtml

     * @param  string              $filename

     * @return DOMDocument

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    public static function load($actual, $isHtml = FALSE, $filename = '')

    {

        if ($actual instanceof DOMDocument) {

            return $actual;

        }

        $internal  = libxml_use_internal_errors(TRUE);

        $reporting = error_reporting(0);

        $dom       = new DOMDocument;

        if ($isHtml) {

            $loaded = $dom->loadHTML($actual);

        } else {

            $loaded = $dom->loadXML($actual);

        }

        libxml_use_internal_errors($internal);

        error_reporting($reporting);

        if ($loaded === FALSE) {

            $message = '';

            foreach (libxml_get_errors() as $error) {

                $message .= $error->message;

            }

            if ($filename != '') {

                throw new PHPUnit_Framework_Exception(

                  sprintf(

                    'Could not load "%s".%s',

                    $filename,

                    $message != '' ? "\n" . $message : ''

                  )

                );

            } else {

                throw new PHPUnit_Framework_Exception($message);

            }

        }

        return $dom;

    }

    /**

     *

     *

     * @param  DOMNode $node

     * @return string

     * @since  Method available since Release 3.4.0

     */

    public static function nodeToText(DOMNode $node)

    {

        if ($node->childNodes->length == 1) {

            return $node->nodeValue;

        }

        $result = '';

        foreach ($node->childNodes as $childNode) {

            $result .= $node->ownerDocument->saveXML($childNode);

        }

        return $result;

    }

    /**

     *

     *

     * @param  DOMNode $node

     * @since  Method available since Release 3.3.0

     * @author Mattis Stordalen Flister <mattis@xait.no>

     */

    public static function removeCharacterDataNodes(DOMNode $node)

    {

        if ($node->hasChildNodes()) {

            for ($i = $node->childNodes->length - 1; $i >= 0; $i--) {

                if (($child = $node->childNodes->item($i)) instanceof DOMCharacterData) {

                    $node->removeChild($child);

                }

            }

        }

    }

    /**

     * "Convert" a DOMElement object into a PHP variable.

     *

     * @param  DOMElement $element

     * @return mixed

     * @since  Method available since Release 3.4.0

     */

    public static function xmlToVariable(DOMElement $element)

    {

        $variable = NULL;

        switch ($element->tagName) {

            case 'array': {

                $variable = array();

                foreach ($element->getElementsByTagName('element') as $element) {

                    $value = self::xmlToVariable($element->childNodes->item(1));

                    if ($element->hasAttribute('key')) {

                        $variable[(string)$element->getAttribute('key')] = $value;

                    } else {

                        $variable[] = $value;

                    }

                }

            }

            break;

            case 'object': {

                $className = $element->getAttribute('class');

                if ($element->hasChildNodes()) {

                    $arguments       = $element->childNodes->item(1)->childNodes;

                    $constructorArgs = array();

                    foreach ($arguments as $argument) {

                        if ($argument instanceof DOMElement) {

                            $constructorArgs[] = self::xmlToVariable($argument);

                        }

                    }

                    $class    = new ReflectionClass($className);

                    $variable = $class->newInstanceArgs($constructorArgs);

                } else {

                    $variable = new $className;

                }

            }

            break;

            case 'boolean': {

                $variable = $element->nodeValue == 'true' ? TRUE : FALSE;

            }

            break;

            case 'integer':

            case 'double':

            case 'string': {

                $variable = $element->nodeValue;

                settype($variable, $element->tagName);

            }

            break;

        }

        return $variable;

    }

    /**

     * Validate list of keys in the associative array.

     *

     * @param  array $hash

     * @param  array $validKeys

     * @return array

     * @throws InvalidArgumentException

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    public static function assertValidKeys(array $hash, array $validKeys)

    {

        $valids = array();

        // Normalize validation keys so that we can use both indexed and

        // associative arrays.

        foreach ($validKeys as $key => $val) {

            is_int($key) ? $valids[$val] = NULL : $valids[$key] = $val;

        }

        $validKeys = array_keys($valids);

        // Check for invalid keys.

        foreach ($hash as $key => $value) {

            if (!in_array($key, $validKeys)) {

                $unknown[] = $key;

            }

        }

        if (!empty($unknown)) {

            throw new InvalidArgumentException(

              'Unknown key(s): ' . implode(', ', $unknown)

            );

        }

        // Add default values for any valid keys that are empty.

        foreach ($valids as $key => $value) {

            if (!isset($hash[$key])) {

                $hash[$key] = $value;

            }

        }

        return $hash;

    }

    /**

     * Parse a CSS selector into an associative array suitable for

     * use with findNodes().

     *

     * @param  string $selector

     * @param  mixed  $content

     * @return array

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    public static function convertSelectToTag($selector, $content = TRUE)

    {

        $selector = trim(preg_replace("/\s+/", " ", $selector));

        // substitute spaces within attribute value

        while (preg_match('/\[[^\]]+"[^"]+\s[^"]+"\]/', $selector)) {

            $selector = preg_replace(

              '/(\[[^\]]+"[^"]+)\s([^"]+"\])/', "$1__SPACE__$2", $selector

            );

        }

        if (strstr($selector, ' ')) {

            $elements = explode(' ', $selector);

        } else {

            $elements = array($selector);

        }

        $previousTag = array();

        foreach (array_reverse($elements) as $element) {

            $element = str_replace('__SPACE__', ' ', $element);

            // child selector

            if ($element == '>') {

                $previousTag = array('child' => $previousTag['descendant']);

                continue;

            }

            $tag = array();

            // match element tag

            preg_match("/^([^\.#\[]*)/", $element, $eltMatches);

            if (!empty($eltMatches[1])) {

                $tag['tag'] = $eltMatches[1];

            }

            // match attributes (\[[^\]]*\]*), ids (#[^\.#\[]*),

            // and classes (\.[^\.#\[]*))

            preg_match_all(

              "/(\[[^\]]*\]*|#[^\.#\[]*|\.[^\.#\[]*)/", $element, $matches

            );

            if (!empty($matches[1])) {

                $classes = array();

                $attrs   = array();

                foreach ($matches[1] as $match) {

                    // id matched

                    if (substr($match, 0, 1) == '#') {

                        $tag['id'] = substr($match, 1);

                    }

                    // class matched

                    else if (substr($match, 0, 1) == '.') {

                        $classes[] = substr($match, 1);

                    }

                    // attribute matched

                    else if (substr($match, 0, 1) == '[' &&

                             substr($match, -1, 1) == ']') {

                        $attribute = substr($match, 1, strlen($match) - 2);

                        $attribute = str_replace('"', '', $attribute);

                        // match single word

                        if (strstr($attribute, '~=')) {

                            list($key, $value) = explode('~=', $attribute);

                            $value             = "regexp:/.*\b$value\b.*/";

                        }

                        // match substring

                        else if (strstr($attribute, '*=')) {

                            list($key, $value) = explode('*=', $attribute);

                            $value             = "regexp:/.*$value.*/";

                        }

                        // exact match

                        else {

                            list($key, $value) = explode('=', $attribute);

                        }

                        $attrs[$key] = $value;

                    }

                }

                if ($classes) {

                    $tag['class'] = join(' ', $classes);

                }

                if ($attrs) {

                    $tag['attributes'] = $attrs;

                }

            }

            // tag content

            if (is_string($content)) {

                $tag['content'] = $content;

            }

            // determine previous child/descendants

            if (!empty($previousTag['descendant'])) {

                $tag['descendant'] = $previousTag['descendant'];

            }

            else if (!empty($previousTag['child'])) {

                $tag['child'] = $previousTag['child'];

            }

            $previousTag = array('descendant' => $tag);

        }

        return $tag;

    }

    /**

     * Parse an $actual document and return an array of DOMNodes

     * matching the CSS $selector.  If an error occurs, it will

     * return FALSE.

     *

     * To only return nodes containing a certain content, give

     * the $content to match as a string.  Otherwise, setting

     * $content to TRUE will return all nodes matching $selector.

     *

     * The $actual document may be a DOMDocument or a string

     * containing XML or HTML, identified by $isHtml.

     *

     * @param  array   $selector

     * @param  string  $content

     * @param  mixed   $actual

     * @param  boolean $isHtml

     * @return false|array

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    public static function cssSelect($selector, $content, $actual, $isHtml = TRUE)

    {

        $matcher = self::convertSelectToTag($selector, $content);

        $dom     = self::load($actual, $isHtml);

        $tags    = self::findNodes($dom, $matcher);

        return $tags;

    }

    /**

     * Parse out the options from the tag using DOM object tree.

     *

     * @param  DOMDocument $dom

     * @param  array       $options

     * @param  boolean     $isHtml

     * @return array

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    public static function findNodes(DOMDocument $dom, array $options, $isHtml = TRUE)

    {

        $valid = array(

          'id', 'class', 'tag', 'content', 'attributes', 'parent',

          'child', 'ancestor', 'descendant', 'children'

        );

        $filtered = array();

        $options  = self::assertValidKeys($options, $valid);

        // find the element by id

        if ($options['id']) {

            $options['attributes']['id'] = $options['id'];

        }

        if ($options['class']) {

            $options['attributes']['class'] = $options['class'];

        }

        // find the element by a tag type

        if ($options['tag']) {

            if ($isHtml) {

                $elements = self::getElementsByCaseInsensitiveTagName(

                  $dom, $options['tag']

                );

            } else {

                $elements = $dom->getElementsByTagName($options['tag']);

            }

            foreach ($elements as $element) {

                $nodes[] = $element;

            }

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // no tag selected, get them all

        else {

            $tags = array(

              'a', 'abbr', 'acronym', 'address', 'area', 'b', 'base', 'bdo',

              'big', 'blockquote', 'body', 'br', 'button', 'caption', 'cite',

              'code', 'col', 'colgroup', 'dd', 'del', 'div', 'dfn', 'dl',

              'dt', 'em', 'fieldset', 'form', 'frame', 'frameset', 'h1', 'h2',

              'h3', 'h4', 'h5', 'h6', 'head', 'hr', 'html', 'i', 'iframe',

              'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'link',

              'map', 'meta', 'noframes', 'noscript', 'object', 'ol', 'optgroup',

              'option', 'p', 'param', 'pre', 'q', 'samp', 'script', 'select',

              'small', 'span', 'strong', 'style', 'sub', 'sup', 'table',

              'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'title',

              'tr', 'tt', 'ul', 'var'

            );

            foreach ($tags as $tag) {

                if ($isHtml) {

                    $elements = self::getElementsByCaseInsensitiveTagName(

                      $dom, $tag

                    );

                } else {

                    $elements = $dom->getElementsByTagName($tag);

                }

                foreach ($elements as $element) {

                    $nodes[] = $element;

                }

            }

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by attributes

        if ($options['attributes']) {

            foreach ($nodes as $node) {

                $invalid = FALSE;

                foreach ($options['attributes'] as $name => $value) {

                    // match by regexp if like "regexp:/foo/i"

                    if (preg_match('/^regexp\s*:\s*(.*)/i', $value, $matches)) {

                        if (!preg_match($matches[1], $node->getAttribute($name))) {

                            $invalid = TRUE;

                        }

                    }

                    // class can match only a part

                    else if ($name == 'class') {

                        // split to individual classes

                        $findClasses = explode(

                          ' ', preg_replace("/\s+/", " ", $value)

                        );

                        $allClasses = explode(

                          ' ',

                          preg_replace("/\s+/", " ", $node->getAttribute($name))

                        );

                        // make sure each class given is in the actual node

                        foreach ($findClasses as $findClass) {

                            if (!in_array($findClass, $allClasses)) {

                                $invalid = TRUE;

                            }

                        }

                    }

                    // match by exact string

                    else {

                        if ($node->getAttribute($name) != $value) {

                            $invalid = TRUE;

                        }

                    }

                }

                // if every attribute given matched

                if (!$invalid) {

                    $filtered[] = $node;

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by content

        if ($options['content'] !== NULL) {

            foreach ($nodes as $node) {

                $invalid = FALSE;

                // match by regexp if like "regexp:/foo/i"

                if (preg_match('/^regexp\s*:\s*(.*)/i', $options['content'], $matches)) {

                    if (!preg_match($matches[1], self::getNodeText($node))) {

                        $invalid = TRUE;

                    }

                }

                // match by exact string

                else if (strstr(self::getNodeText($node), $options['content']) === FALSE) {

                    $invalid = TRUE;

                }

                if (!$invalid) {

                    $filtered[] = $node;

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by parent node

        if ($options['parent']) {

            $parentNodes = self::findNodes($dom, $options['parent']);

            $parentNode  = isset($parentNodes[0]) ? $parentNodes[0] : NULL;

            foreach ($nodes as $node) {

                if ($parentNode !== $node->parentNode) {

                    break;

                }

                $filtered[] = $node;

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by child node

        if ($options['child']) {

            $childNodes = self::findNodes($dom, $options['child']);

            $childNodes = !empty($childNodes) ? $childNodes : array();

            foreach ($nodes as $node) {

                foreach ($node->childNodes as $child) {

                    foreach ($childNodes as $childNode) {

                        if ($childNode === $child) {

                            $filtered[] = $node;

                        }

                    }

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by ancestor

        if ($options['ancestor']) {

            $ancestorNodes = self::findNodes($dom, $options['ancestor']);

            $ancestorNode  = isset($ancestorNodes[0]) ? $ancestorNodes[0] : NULL;

            foreach ($nodes as $node) {

                $parent = $node->parentNode;

                while ($parent->nodeType != XML_HTML_DOCUMENT_NODE) {

                    if ($parent === $ancestorNode) {

                        $filtered[] = $node;

                    }

                    $parent = $parent->parentNode;

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by descendant

        if ($options['descendant']) {

            $descendantNodes = self::findNodes($dom, $options['descendant']);

            $descendantNodes = !empty($descendantNodes) ? $descendantNodes : array();

            foreach ($nodes as $node) {

                foreach (self::getDescendants($node) as $descendant) {

                    foreach ($descendantNodes as $descendantNode) {

                        if ($descendantNode === $descendant) {

                            $filtered[] = $node;

                        }

                    }

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return FALSE;

            }

        }

        // filter by children

        if ($options['children']) {

            $validChild   = array('count', 'greater_than', 'less_than', 'only');

            $childOptions = self::assertValidKeys(

                              $options['children'], $validChild

                            );

            foreach ($nodes as $node) {

                $childNodes = $node->childNodes;

                foreach ($childNodes as $childNode) {

                    if ($childNode->nodeType !== XML_CDATA_SECTION_NODE &&

                        $childNode->nodeType !== XML_TEXT_NODE) {

                        $children[] = $childNode;

                    }

                }

                // we must have children to pass this filter

                if (!empty($children)) {

                    // exact count of children

                    if ($childOptions['count'] !== NULL) {

                        if (count($children) !== $childOptions['count']) {

                            break;

                        }

                    }

                    // range count of children

                    else if ($childOptions['less_than']    !== NULL &&

                            $childOptions['greater_than'] !== NULL) {

                        if (count($children) >= $childOptions['less_than'] ||

                            count($children) <= $childOptions['greater_than']) {

                            break;

                        }

                    }

                    // less than a given count

                    else if ($childOptions['less_than'] !== NULL) {

                        if (count($children) >= $childOptions['less_than']) {

                            break;

                        }

                    }

                    // more than a given count

                    else if ($childOptions['greater_than'] !== NULL) {

                        if (count($children) <= $childOptions['greater_than']) {

                            break;

                        }

                    }

                    // match each child against a specific tag

                    if ($childOptions['only']) {

                        $onlyNodes = self::findNodes(

                          $dom, $childOptions['only']

                        );

                        // try to match each child to one of the 'only' nodes

                        foreach ($children as $child) {

                            $matched = FALSE;

                            foreach ($onlyNodes as $onlyNode) {

                                if ($onlyNode === $child) {

                                    $matched = TRUE;

                                }

                            }

                            if (!$matched) {

                                break(2);

                            }

                        }

                    }

                    $filtered[] = $node;

                }

            }

            $nodes    = $filtered;

            $filtered = array();

            if (empty($nodes)) {

                return;

            }

        }

        // return the first node that matches all criteria

        return !empty($nodes) ? $nodes : array();

    }

    /**

     * Recursively get flat array of all descendants of this node.

     *

     * @param  DOMNode $node

     * @return array

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    protected static function getDescendants(DOMNode $node)

    {

        $allChildren = array();

        $childNodes  = $node->childNodes ? $node->childNodes : array();

        foreach ($childNodes as $child) {

            if ($child->nodeType === XML_CDATA_SECTION_NODE ||

                $child->nodeType === XML_TEXT_NODE) {

                continue;

            }

            $children    = self::getDescendants($child);

            $allChildren = array_merge($allChildren, $children, array($child));

        }

        return isset($allChildren) ? $allChildren : array();

    }

    /**

     * Gets elements by case insensitive tagname.

     *

     * @param  DOMDocument $dom

     * @param  string      $tag

     * @return DOMNodeList

     * @since  Method available since Release 3.4.0

     */

    protected static function getElementsByCaseInsensitiveTagName(DOMDocument $dom, $tag)

    {

        $elements = $dom->getElementsByTagName(strtolower($tag));

        if ($elements->length == 0) {

            $elements = $dom->getElementsByTagName(strtoupper($tag));

        }

        return $elements;

    }

    /**

     * Get the text value of this node's child text node.

     *

     * @param  DOMNode $node

     * @return string

     * @since  Method available since Release 3.3.0

     * @author Mike Naberezny <mike@maintainable.com>

     * @author Derek DeVries <derek@maintainable.com>

     */

    protected static function getNodeText(DOMNode $node)

    {

        if (!$node->childNodes instanceof DOMNodeList) {

            return '';

        }

        $result = '';

        foreach ($node->childNodes as $childNode) {

            if ($childNode->nodeType === XML_TEXT_NODE) {

                $result .= trim($childNode->data) . ' ';

            } else {

                $result .= self::getNodeText($childNode);

            }

        }

        return str_replace('  ', ' ', $result);

    }

}

?>