Styjun

I use the PHP script shown below that takes XML data from the Flickr API and gives out an array, but I don't know how to get the values from this array and do some operations with it.

The array has this format:

XmlElement Object
(
 [name] => rsp
 [attributes] => Array
 (
 [stat] => ok
 )

 [content] => 
 [children] => Array
 (
 [0] => XmlElement Object
 (
 [name] => photos
 [attributes] => Array
 (
 [page] => 1
 [pages] => 13751
 [perpage] => 100
 [total] => 1375086
 )

 [content] => 
 [children] => Array
 (
 [0] => XmlElement Object
 (
 [name] => photo
 [attributes] => Array
 (
 [id] => 25000430521
 [owner] => 73422502@N08
 [secret] => 19459b26e4
 [server] => 1703
 [farm] => 2
 [title] => Health
 [ispublic] => 1
 [isfriend] => 0
 [isfamily] => 0
 [url_m] => https://farm2.staticflickr.com/1703/25000430521_19459b26e4.jpg
 [height_m] => 500
 [width_m] => 500
 )

 [content] => 
 [children] => 
 )

 [1] => XmlElement Object
 (
 [name] => photo
 [attributes] => Array
 (
 [id] => 35305743196
 [owner] => 73422502@N08
 [secret] => 9601255217
 [server] => 4232
 [farm] => 5
 [title] => Health
 [ispublic] => 1
 [isfriend] => 0
 [isfamily] => 0
 [url_m] => https://farm5.staticflickr.com/4232/35305743196_9601255217.jpg
 [height_m] => 333
 [width_m] => 500
 )

 [content] => 
 [children] => 
 )

Here is what I try to accomplish:

I try to use these 2 values

´[height_m] => 333 [width_m] => 500´

and use the if construct..

 if (**width_m** / **height_m** >= 1.25 ) 
 echo "<img src=" **url_m** " width="100">;
 
 else 
 echo "<img src=" **url_m** " width="50">;
 

How do I get this construct in a for each loop?

The code that generates the array comes from an awesome user at php.net

class XmlElement 
 var $name;
 var $attributes;
 var $content;
 var $children;
;

function xml_to_object($xml) 
 $parser = xml_parser_create();
 xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
 xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
 xml_parse_into_struct($parser, $xml, $tags);
 xml_parser_free($parser);

 $elements = array(); // the currently filling [child] XmlElement array
 $stack = array();
 foreach ($tags as $tag) 
 return $elements[0]; // the single top-level element

The simplest approach I can conceive (change "$Object" to the variable name of your XMLElement Object):

foreach($Object->children[0]->children as $child) 
 if ($child->attributes['width_m'] / $child->attributes['height_m'] >= 1.25 ) 
 echo "<img src=" . $child->attributes['url_m'] . " width="100">;
 
 else 
 echo "<img src=" . $child->attributes['url_m'] . " width="50">;
 

This is not a foreach loop but it will essentiall do the same thing:

$allImageHtml = array_map(function($photoData)
 $width = ($photoData->attributes['width_m'] / $photoData->attributes['height_m']) >= 1.25 ?100:50;
 return "<img src='$child->attributes['url_m'] width='$width'/>";
, $Object->children[0]->children);

echo implode('<!-- Separator HTML. (ie: br) -->', $allImageHtml);

Alternatively if you would prefer a foreach loop:

foreach($Object->children[0]->children as $photoData)
 $width = ($photoData->attributes['width_m'] / $photoData->attributes['height_m']) >= 1.25 ? 100: 50;
 $spacer = "<!-- Separator HTML. (ie: br) -->";
 echo "<img src='$child->attributes['url_m'] width='$width'/>$spacer";