php simplexml - string as object

Question

Hoping somebody can advise on an issue I have with simplexml.

I need to specify the paths for various nodes but I'm not sure if this is possible.

$xml = new SimpleXMLElement($xmlstr); $image1 = 'images->image[0]->image'; foreach ($xml->record as $record) { echo $record->$image1; // i need this be be recognised as $record->images->image[0]->image }

Hope this makes sense! Thanks

Can't you convert it to XPath code? That's a lot easier and more safe to execute than eval()'d PHP code — Harmen
– Harmen, Commented Nov 4, 2010 at 20:11

Jacob Relkin · Accepted Answer · 2010-11-05 02:08:42Z

You can use an array for this:

$xml = new SimpleXMLElement($xmlstr); $levels = array('images', array('key' => 'image', 'index' => 0), 'image'); foreach ($xml->record as $record) { $obj = $record; foreach($levels as $level) { if(is_array($level)) $obj = $obj->{$level['key']}[$level['index']]; else $obj = $obj->$level; } echo $obj; }

This builds up the hierarchy by reassigning $obj equal to itself -> whatever is next in the array.

PHP cannot interpolate array indices in strings, so if you need to use them, just use an associate array as shown above. :-)

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