Accessing data within array

**Chrisio** · Aug 3rd, 2006, 05:07 AM

OK,
I have an array full of data - how on earth do I access that data, if I print_r($data) it echos it onto the screen ok I just cant get it to output what I want. I have tried accessing it thro $data['var'], $data[0] etc but I cant get it to produce.

below is the code that I am using.

PHP Code:


<?php

function GetXMLTree ($xmldata)

{

    // we want to know if an error occurs

    ini_set ('track_errors', '1');



    $xmlreaderror = false;



    $parser = xml_parser_create ('ISO-8859-1');

    xml_parser_set_option ($parser, XML_OPTION_SKIP_WHITE, 1);

    xml_parser_set_option ($parser, XML_OPTION_CASE_FOLDING, 0);

    if (!xml_parse_into_struct ($parser, $xmldata, $vals, $index)) {

        $xmlreaderror = true;

        echo "error";

    }

    xml_parser_free ($parser);



    if (!$xmlreaderror) {

        $result = array ();

        $i = 0;

        if (isset ($vals [$i]['attributes']))

            foreach (array_keys ($vals [$i]['attributes']) as $attkey)

            $attributes [$attkey] = $vals [$i]['attributes'][$attkey];



        $result [$vals [$i]['tag']] = array_merge ($attributes, GetChildren ($vals, $i, 'open'));

    }



    ini_set ('track_errors', '0');

    return $result;

}



function GetChildren ($vals, &$i, $type)

{

    if ($type == 'complete') {

        if (isset ($vals [$i]['value']))

            return ($vals [$i]['value']);

        else

            return '';

    }



    $children = array (); // Contains node data



    /* Loop through children */

    while ($vals [++$i]['type'] != 'close') {

        $type = $vals [$i]['type'];

        // first check if we already have one and need to create an array

        if (isset ($children [$vals [$i]['tag']])) {

            if (is_array ($children [$vals [$i]['tag']])) {

                $temp = array_keys ($children [$vals [$i]['tag']]);

                // there is one of these things already and it is itself an array

                if (is_string ($temp [0])) {

                    $a = $children [$vals [$i]['tag']];

                    unset ($children [$vals [$i]['tag']]);

                    $children [$vals [$i]['tag']][0] = $a;

                }

            } else {

                $a = $children [$vals [$i]['tag']];

                unset ($children [$vals [$i]['tag']]);

                $children [$vals [$i]['tag']][0] = $a;

            }



            $children [$vals [$i]['tag']][] = GetChildren ($vals, $i, $type);

        } else

            $children [$vals [$i]['tag']] = GetChildren ($vals, $i, $type);

        // I don't think I need attributes but this is how I would do them:

        if (isset ($vals [$i]['attributes'])) {

            $attributes = array ();

            foreach (array_keys ($vals [$i]['attributes']) as $attkey)

            $attributes [$attkey] = $vals [$i]['attributes'][$attkey];

            // now check: do we already have an array or a value?

            if (isset ($children [$vals [$i]['tag']])) {

                // case where there is an attribute but no value, a complete with an attribute in other words

                if ($children [$vals [$i]['tag']] == '') {

                    unset ($children [$vals [$i]['tag']]);

                    $children [$vals [$i]['tag']] = $attributes;

                }

                // case where there is an array of identical items with attributes

                elseif (is_array ($children [$vals [$i]['tag']])) {

                    $index = count ($children [$vals [$i]['tag']]) - 1;

                    // probably also have to check here whether the individual item is also an array or not or what... all a bit messy

                    if ($children [$vals [$i]['tag']][$index] == '') {

                        unset ($children [$vals [$i]['tag']][$index]);

                        $children [$vals [$i]['tag']][$index] = $attributes;

                    }

                    $children [$vals [$i]['tag']][$index] = array_merge ($children [$vals [$i]['tag']][$index], $attributes);

                } else {

                    $value = $children [$vals [$i]['tag']];

                    unset ($children [$vals [$i]['tag']]);

                    $children [$vals [$i]['tag']]['value'] = $value;

                    $children [$vals [$i]['tag']] = array_merge ($children [$vals [$i]['tag']], $attributes);

                }

            } else

                $children [$vals [$i]['tag']] = $attributes;

        }

    }



    return $children;

}

$url = "http://www.affiliate.viator.com/xml/affiliateXMLData.jsp?IATA=POS"; //URL of the XML FEED



$contents = file_get_contents($url);



$data = GetXMLTree ($contents);

print_r($data);

//echo $data['ProductPageURL'][1];



?>

**penagate** · Aug 4th, 2006, 04:33 AM

What does print_r($data) output?

**Chrisio** · Aug 4th, 2006, 02:23 PM

Originally Posted by penagate

What does print_r($data) output?

hi,
print_r() produces ...

Code:

Thanks Chris

**modpluz** · Aug 5th, 2006, 02:42 AM

well i think what you want to do is access an array right?

so in the process of looping through the array one or more element of the array is also an array on its own,

say you have an array named myArray() with 5 elements and you want to loop through them.

but in the process one or more elements of myArray() is also an array,

say maybe item 2 and 4 is also an array,

if my illustrations are right then maybe you should try to check if an array element is also an array(if it is then parse it as you wish in script) and so on.

**penagate** · Aug 5th, 2006, 04:24 AM

Use this at the top of your code whenever you use print_r().

PHP Code:


header('Content-type: text/plain');

Then you will actually be able to see meaningful output from print_r(). It's simply a whole lot of nested arrays, you should be able to work out how to access it when you see the output formatted properly.

Example:

Code:

Array (
  [ViatorAffiliateXMLData] => Array (
    [xmlns:xsi] => http://www.w3.org/2001/XMLSchema-instance
    [xsi:noNamespaceSchemaLocation] => affiliate.xsd [CreationDate] => 2006-08-02T03:00:04+10:00
    [SchemaVersion] => 1.0
    [Currency] => USD
    [IATA] => Array (
      [ProductItem] => Array (
        [0] => Array (
          [ProductType] => Sightseeing
          [ProductCode] => 4130POS_AW
          [ReleaseDate] => 20030101
          ...

PHP Code:


$data['ViatorAffiliateXMLData']['IATA']['ProductItem'][0]['ProductCode'] == '4130POS_AW'

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