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Author	unknown
Size:	1140 b
Created:	12/12/2012 9:09am

Version:	2
Hits:	24
Render Time:	0.00 ms


PHP Version

Output: HTML (hide)

Code: (hide)

<pre><?php
 // behaves like array(*, 245, *, 'subfields', *, 'a', *);
 // where * is a wildcard for 0 or more keys
 $keySequence = array(245, 'subfields', 'a');
 	
 	
 $arr = array();
 $arr[245]['subfields']['a'] = 'i match';
 $arr[245]['subfields'][7]['a'] = 'i match';
 $arr[0][0][0][245][0][0]['subfields']['subfields'][0]['a']['a'] = 'i match';
 $arr[0][0][0][0][0][0]['subfields']['subfields'][0]['a']['a'] = 'i dont match';
 $arr[0][0][0][0][0][0]['subfields']['subfields'][0]['a']['a'] = 'i dont match';
 
 // behaves like array(*, 245, *, 'subfields', *, 'a', *);
 // where * is a wildcard for 0 or more keys
 $keySequence = array(245, 'subfields', 'a');
 $iter = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
 $filtered = new CallbackFilterIterator($iter, function ($_, $_, $iterator) use ($keySequence) {
 	$i = 0;
 	$max = count($keySequence);
 	foreach (range(0, $iterator->getDepth()) as $depth) {
 		if ($keySequence[$i] === $iterator->getSubIterator($depth)->key())
 			$i++;
 		if ($i === $max)
 			return true;
 	}
 	return $i === $max;
 });
 
 foreach ($filtered as $leafVal) {
 	echo "$leafVal\n";
 }

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codepad.viper-7.com

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