help with my php code

[wilsonshen]

Hi,
Recently I am try to do some programming work.
I want my Zen Cart store to update tracking information to the online system of our shipping agency.
I got strange problem.
I installed in my local PC:
Apache 2.2.9
PHP 5.2.6
MySQL 5.1.28＆4.0.26

I also install a zencart in my local PC.
I ran the following track.php file in my PC:

<?php
echo "hi";
var_dump(esp_track_result('10465708'));

function esp_track_result($sn){
$url         = "http://api.espeedpost.com/track/";
$devid     = "EspeedPost";
$appid     = "80010616-XXXXXXXXXXXX";
if ($sn != '')
    {
    $string = array
    (
    "devid" => $devid,
    "appid" => $appid,
    "cus_name" => "no",
    "cus_value" => $sn,
    );

    $content = Post($url, $string);  
    
    
    
    $objXmlToArray=new xmlToArray();
    $objXmlToArray->parseString($content);
    $data = $objXmlToArray->getTree();
    //print_r($data);
    $objXmlToArray->free();

    //提取查询信息
    $result = $data[GetTrackingInformation][Result][value];

    if ($result == "Success"){
    //echo "The latest status of parcel ".$data[GetTrackingInformation][ParcelNumber][value]." is ".$data[GetTrackingInformation][ParcelInfo][LastStatusContent][value]." at ".$data[GetTrackingInformation][ParcelInfo][LastDateTime][value]."\n";
    //echo "AAAAAA";
    return $data[GetTrackingInformation][ParcelNumber][value];
    }
    if ($result == "Failure"){
    //echo $data[GetTrackingInformation][Reason][value]."\n";
    //echo "BBBBBBB";
    return false;
    }
    
    
    }

}
////////////////////////////////////////////////////////

///////////////////////////////////////////////////////
function Post($url, $post = null)
{  
$context = array();  
  
if (is_array($post))    
    {  
    ksort($post);  
    $context["http"] = array
        (  
        "method" => "POST",  
        "content" => http_build_query($post, "", "&"),  
        );  
    }  
    return file_get_contents($url, false, stream_context_create($context));  
}

//////////////////////////////////////////////////////
function urlvalue($urlname)
{
$urlvalue = !empty($_POST[$urlname]) ? $_POST[$urlname] : $_GET[$urlname];
return $urlvalue;
}

//////////////////////////////////////////////////////////
class xmlToArray
{
    var $parser;
   
    /**
    * source encoding
    *
    * @var string
    */
    var $srcenc;
   
    /**
    * target encoding
    *
    * @var string
    */
    var $dstenc;
   
    /**
    * the original struct
    *
    * @access private
    * @var array
    */
    var $_struct = array();
   
    /**
    * Constructor
    *
    * @access public
    * @param mixed [$srcenc] source encoding
    * @param mixed [$dstenc] target encoding
    * @return void
    * @since
    */
    function xmlToArray($srcenc = null, $dstenc = null)
    {
        $this->srcenc = $srcenc;
        $this->dstenc = $dstenc;
       
        // initialize the variable.
        $this->parser = null;
        $this->_struct = array();
    }
   
    /**
    * 释放资源
    *
    * @access public
    * @return void
    **/
    function free()
    {
        if (isset($this->parser) && is_resource($this->parser))
        {
            xml_parser_free($this->parser);
            unset($this->parser);
        }
    }
   
    /**
    * 解析XML文件
    *
    * @access public
    * @param string [$file] the XML file name
    * @return void
    * @since
    */
    function parseFile($file)
    {
        $data = @file_get_contents($file) or die("Can't open file $file for reading!");
        $this->parseString($data);
    }
   
    /**
    * 解析XML字符串
    *
    * @access public
    * @param string [$data] XML data
    * @return void
    */
    function parseString($data)
    {
        if ($this->srcenc === null)
        {
            $this->parser = @xml_parser_create() or die('Unable to create XML parser resource.');
        }
        else
        {
            $this->parser = @xml_parser_create($this->srcenc) or die('Unable to create XML parser resource with '. $this->srcenc .' encoding.');
        }
       
        if ($this->dstenc !== null)
        {
            @xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->dstenc) or die('Invalid target encoding');
        }
        xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0); // lowercase tags
        xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1); // skip empty tags
        if (!xml_parse_into_struct($this->parser, $data, &$this->_struct))
        {
            printf("XML error: %s at line %d",
            xml_error_string(xml_get_error_code($this->parser)),
            xml_get_current_line_number($this->parser)
        );
        $this->free();
        exit();
        }
       
        $this->_count = count($this->_struct);
        $this->free();
    }
   
    /**
    * 返回解析完毕后的XML数组
    *
    * @access public
    * @return array
    */
    function getTree()
    {
        $i = 0;
        $tree = array();
       
        $tree = $this->addNode(
            $tree,
            $this->_struct[$i]['tag'],
            (isset($this->_struct[$i]['value'])) ? $this->_struct[$i]['value'] : '',
            (isset($this->_struct[$i]['attributes'])) ? $this->_struct[$i]['attributes'] : '',
            $this->getChild($i)
        );
       
        unset($this->_struct);
    return ($tree);
    }
   
    /**
    * recursion the children node data
    *
    * @access public
    * @param integer [$i] the last struct index
    * @return array
    */
    function getChild(&$i)
    {
    // contain node data
    $children = array();
   
    // loop
    while (++$i < $this->_count)
    {
    // node tag name
    $tagname = $this->_struct[$i]['tag'];
    $value = isset($this->_struct[$i]['value']) ? $this->_struct[$i]['value'] : '';
    $attributes = isset($this->_struct[$i]['attributes']) ? $this->_struct[$i]['attributes'] : '';
   
    switch ($this->_struct[$i]['type']) {
    case 'open':
    // node has more children
    $child = $this->getChild($i);
    // append the children data to the current node
    $children = $this->addNode($children, $tagname, $value, $attributes, $child);
    break;
    case 'complete':
    // at end of current branch
    $children = $this->addNode($children, $tagname, $value, $attributes);
    break;
    case 'cdata':
    // node has CDATA after one of it's children
    $children['value'] .= $value;
    break;
    case 'close':
    // end of node, return collected data
    return $children;
    break;
    }
   
    }
    //return $children;
    }
   
        /**
        * Appends some values to an array
        *
        * @access public
        * @param array [$target]
        * @param string [$key]
        * @param string [$value]
        * @param array [$attributes]
        * @param array [$inner] the children
        * @return void
        * @since
        */
        function addNode($target, $key, $value = '', $attributes = '', $child = '')
        {
            if (!isset($target[$key]['value']) && !isset($target[$key][0]))
            {
                if ($child != '')
                {
                    $target[$key] = $child;
                }
                if ($attributes != '')
                {
                    foreach ($attributes as $k => $v)
                    {
                    $target[$key][$k] = $v;
                    }
                }
           
                $target[$key]['value'] = $value;
            }
            else
            {
                if (!isset($target[$key][0]))
                {
                    // is string or other
                    $oldvalue = $target[$key];
                    $target[$key] = array();
                    $target[$key][0] = $oldvalue;
                    $index = 1;
                }
                else
                {
                    // is array
                    $index = count($target[$key]);
                }
           
                if ($child != '') {
                $target[$key][$index] = $child;
                }
           
                if ($attributes != '') {
                foreach ($attributes as $k => $v) {
                $target[$key][$index][$k] = $v;
                }
                }
                $target[$key][$index]['value'] = $value;
            }
            return $target;
        }
}

//////////////////////////////////////////////////////////////////////
?>

Everything works fine. I could get reply.
However, I upload the code to my server:
Apache version 2.2.26
PHP version 5.2.17
MySQL version 5.5.36-log

The php could not run. I got nothing on my browser. Even the first code replying "hi" seems not work. Nothing replied even error indication.
I also wrote other php files and they all could run.
Any ideal what 's wrong?
Thanks for your time.

[twitchtoo]

Which page are you calling the track.php file from in Zen Cart?

[wilsonshen]

I visited this page from browser directly, not called from other page.

[mc12345678]

I visited this page from browser directly, not called from other page.

Can't say from just looking at it that there is any particularly special line of code, but are the same add-ons enabled on the server in php.ini as on local computer?

Do you have access to the server error logs to identify what the server thinks is wrong? The way it is written, ZC won't generate any error, because at the moment it is independent of ZC (or so it appears). Also may want to see if any of the functions used (again, didn't see any that were special while scrolling through) have been deprecated in the more recent version of PHP on the server. Check the php manual for that as a source.