php xml 保存到array数组

<?php

function xmlStringToArray($xmlString)
        {
        $xmlString = preg_replace('/<!--.*?-->/s','',$xmlString);
        $exitAfterManyLoops = 0;
        $xmlArray = array();
        $currentNode = &$xmlArray;
        $currentHierarchy = array();
        $currentDepth = 0;
        while($xmlString != '')
                {
                $exitAfterManyLoops++;
                if($exitAfterManyLoops > 300)
                        {
                        print "BREAK";
                        break;
                        }
                $xmlString = trim(substr($xmlString, strpos($xmlString, '<')));
                $thisNodeAscends = (substr($xmlString, 1, 1) == '/');
                $thisNodeDescends = (substr($xmlString, strpos($xmlString, '>') - 1, 1) != '/');
                $nodeName = substr($xmlString, 1, strpos($xmlString, ' ') -1);
                $openElement = substr($xmlString, strpos($xmlString, ' ') + 1);
                $openElement = substr($openElement, 0, strpos($openElement, '>') );
                if(substr($openElement, strlen($openElement) - 1, 1) == "/")
                        {
                        $openElement = substr($openElement, 0, strlen($openElement) - 1);
                        }

                if($thisNodeAscends)
                        {
                        $currentDepth--;
                        $currentNode = &$currentHierarchy[$currentDepth];
                        }
                else
                        {
                        if($thisNodeDescends)
                                {
                                $currentNode[] = array('__attributes' => parseXmlAttributesString($openElement), '__children' => array(), '__nodeName' => $nodeName);
                                $currentHierarchy[$currentDepth] = &$currentNode;
                                $currentDepth++;
                                $lastItem = &$currentNode[count($currentNode) - 1];
                                $currentNode = &$lastItem['__children'];
                                }
                        else //this node is at the same level
                                {
                                $currentNode[] = array('__attributes' => parseXmlAttributesString($openElement), '__nodeName' => $nodeName);
                                }

                        }
                $xmlString = substr($xmlString, strpos($xmlString, '>') + 1);
                }
        return $xmlArray;
        }

function parseXmlAttributesString($xmlElementString)
        {
        $exitAfter100Loops = 0;
        $xmlElementArray = array();
        while($xmlElementString != '')
                {
                $exitAfter100Loops++;
                if($exitAfter100Loops > 100)
                        {
                        print "BREAK";
                        break;
                        }
                $equalsCharacterPos = strpos($xmlElementString, '=');
                $key = trim(substr($xmlElementString, 0, $equalsCharacterPos));
                $xmlElementString = substr($xmlElementString, $equalsCharacterPos + 1);
                $openBracket = substr($xmlElementString, 0, 1);
                $xmlElementString = substr($xmlElementString, 1);
                $endBracketPos = strpos($xmlElementString, $openBracket);
                $value = substr($xmlElementString, 0, $endBracketPos);
                $xmlElementString = substr($xmlElementString, $endBracketPos + 1);
                if($key)
                        {
                        $xmlElementArray[$key]=$value;
                        }
                }
        return $xmlElementArray;
        }

?>

我在学习PHP的，当我尝试做在session_start（） - 获取有关错误信息不能发送会话cookie。

我看到在这个问题上前面的问题，但是，仍然不能确定我的错误。

如果是错误家伙？
<?php
session_start();
      if ($_POST['add'])
      {
            foreach ($_POST['a_qty'] as $k => $v)
            {
                  $_SESSION['cart'][$k] = $_SESSION['cart'][$k] + $v;
            }
      }
?>
<?php
// look for catalog file
      $catalogfile = "catalog.dat";
      // file is avaialbe, extract data from it and place into $catalog, with sku as key
      if (file_exists($catalogfile))
      {
            $data = file($catalogfile);
            foreach ($data as $line)
            {
                  $lineArray = explode(":", $line);
                  $sku = trim($lineArray[0]);
                  $CATALOG[$sku]['desc'] = trim($lineArray[1]);
                  $CATALOG[$sku]['price'] = trim($lineArray[2]);                             
            }
      }
      else
      {
            die("Could not find the catalog file");
      }
?>
<table border="1" cellspacing="10">
<?php
            // print items from the catalog for selection
            foreach ($CATALOG as $k => $v)
            {
                  echo "<tr><td colspan=2 width=750>";
                  echo "<b>" . $v['desc'] . "</b>";
                  echo "</td></tr>";
                  echo "<tr><td>";
                  echo "Price per unit: " . $CATALOG[$k]['price'];
                  echo "</td><td>Quantity: ";
                  echo "<input size=4 type=text name="a_qty[" . $k . "]">";
                  echo "</td></tr> ";
            }
?>

<?php

function copyViaFtpRecursively($uploadLocation, $previewPath, $remoteDirectory, $ftpType)
        {
        $errorMessage = '';

        $connectionId = getFtpConnection($uploadLocation['host'], $uploadLocation['username'], $uploadLocation['password'], $uploadLocation['port']);
        switch($ftpType)
                {
                case 'active':
                        ftp_pasv($connectionId, False);
                        break;
                case 'passive':
                        ftp_pasv($connectionId, True);
                        break;
                }

        $baseDirectory = $uploadLocation['baseDirectory'];
        if(substr($baseDirectory, strlen($baseDirectory) - 1, 1) != '/')
                {
                $baseDirectory .= '/';
                }
        ftp_mkdir($connectionId, $baseDirectory); // No point showing an error message if the directory exists (most likely cause of error) because it will exist (at least) after the first time.

        $remoteBaseDirectory = $baseDirectory.$remoteDirectory;
        if(substr($remoteBaseDirectory, strlen($remoteBaseDirectory) - 1, 1) == '/')
                {
                $remoteBaseDirectory = substr($remoteBaseDirectory, 0, strlen($remoteBaseDirectory) - 1);
                }

        $remoteBaseDirectory .= '/';
        $errorMessage .= copyFileViaFtp($previewPath, $remoteBaseDirectory, $connectionId);

        ftp_close($connectionId);

        $errorHtml = '';
        if($errorMessage)
                {
                $errorHtml = nl2br($errorMessage);
                }
        return $errorHtml;
        }

function getFtpConnection($host, $username, $password, $port)
        {
        $connectionId = ftp_connect($host);
        if(!@ftp_login($connectionId, $username, $password))
                {
                webServiceError('FTP error. Unable to connect to "'.$host.'" with username "'.$username.'"');
                }
        return $connectionId;
        }

function copyFileViaFtp($sourcePath, $destinationPath, $connectionId)
        {
        $errorMessage = '';
        $sourcePath = str_replace(" ", "-", $sourcePath);
        $destinationPath = str_replace(" ", "-", $destinationPath);
        if(!ftp_mkdir($connectionId, $destinationPath))
                {
                $errorMessage .= "Unable to create directory at ".$destinationPath." (it may already exist) ";
                }
        ftp_site($connectionId, 'CHMOD 0777 '.$destinationPath);
        ftp_chdir($connectionId, $destinationPath);
        //print $sourcePath.' to '.$destinationPath."<br />";
        if(is_dir($sourcePath))
                {
                chdir($sourcePath);
                $handle=opendir('.');
                while(($file = readdir($handle))!==false)
                        {
                        if(($file != ".") && ($file != ".."))
                                {
                                if(is_dir($file))
                                        {
                                        $errorMessage .= copyFileViaFtp($sourcePath.DIRECTORY_SEPARATOR.$file, $file, $connectionId);
                                        chdir($sourcePath);
                                        if(!ftp_cdup($connectionId))
                                                {
                                                $errorMessage .= "Unable to ftp_cdup. ";
                                                }
                                        }
                                else
                                        {
                                        if(substr($file, strlen($file) - 4, 4) != ".zip")
                                                {
                                                $fp = fopen($file,"r");
                                                if(!ftp_fput($connectionId, str_replace(" ", "_", $file), $fp, FTP_BINARY))
                                                        {
                                                        $errorMessage .= "Unable to ftp_fput(). ";
                                                        }
                                                ftp_site($connectionId, 'CHMOD 0755 '.str_replace(" ", "_", $file));
                                                }
                                        }
                                }
                        }
                closedir($handle);
                }

        return $errorMessage;
        }