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Hi all, I would like to ask you if somebody could have a better idea to build this function. The current one is working, but I feel this built a bit in an amateur manner. Feel free to add your ideas so we can learn more about PHP and how to deal with arrays. I have an array: $arrayVideoSpecs = Array( Array( 'aspect' => '4:3', 'density' => '442368', 'resolution' => '768x576' ), Array( 'aspect' => '4:3', 'density' => '307200', 'resolution' => '640x480' ), Array( 'aspect' => '16:9', 'density' => '2073600', 'resolution' => '1920x1080' ), Array( 'aspect' => '16:9', 'density' => '121600', 'resolution' => '1280x720' ) ); and I want an array as output grouped by video aspect ratio where the key is the pixel density and the value is the video resolution, namely like that for aspect ratio 16:9 ... Array ( [2073600] => 1920x1080 [121600] => 1280x720 ) Then I coded this function which is working but seems amateur ... function groupAndExtractByAspect($array, $groupBy, $aspect, $density, $resolution) { $groupByAspect = Array(); foreach ($array as $value) { $groupByAspect[$value[$aspect]][] = Array($value[$density], $value[$resolution]); } $arrayClean = Array(); foreach ($groupByAspect as $key => $value) { if ($key == $groupBy) { $arrayClean[$key] = $value; } } foreach ($arrayClean as $aspectGroup) { $arrayOutput = Array(); for ($i = 0; $i <= count($aspectGroup); $i++) { $densityIsValid = false; $resolutionIsValid = false; if (!empty($arrayClean[$groupBy][$i][0])) { $density = $arrayClean[$groupBy][$i][0]; $densityIsValid = true; } if (!empty($arrayClean[$groupBy][$i][1])) { $resolution = $arrayClean[$groupBy][$i][1]; $resolutionIsValid = true; } if (($densityIsValid === true) && ($resolutionIsValid === true)) { $arrayOutput[$density] = $resolution; } } } return $arrayOutput; } The usage is as follow ... $showArray = groupAndExtractByAspect($arrayVideoSpecs, '16:9', 'aspect', 'density', 'resolution'); echo '<pre>'; print_r($showArray); echo '</pre>'; Thank you very much for your ideas! Mapg

I'm so confused with multidimensional arrays. May I please ask a couple questions? 1.) In the json array below, How do I use PHP to echo, for example, the price offered by Susan? I tried things like echo $result["data"][0]["Susan"] to work, but it won't work. 2.) Near the top of the array it shows the lowest price is $25.56. How do I get PHP to echo that? Again, I tried echo $result[LowestPrice] but that doesn't work. 3.) The array below is really big. What code do I use to create a smaller array of just [Name] and [OfferingPrice] ?? If I can do that, then I can do the PHP thing where you go "foreach ($result as $var=>$value) { echo "$var...$value" } etc., and I can sort it etc. Here's the array: $result = json_decode($stuff,true); print_r($result); //this is what it is output Array ( [data] => Array ( [info] => Array ( [LowestPrice] => 25.56 [PlaceOfManufacture] => USA ) [OfferingPrice] => Array ( [0] => Array ( [OfferingPrice] => 20.00 [salesAssociate] => Array ( [badgeNumber] => 125 [Name] => Fred ) ) [1] => Array ( [OfferingPrice] => 18.36 [salesAssociate] => Array ( [badgeNumber] => 932 [Name] => Susan ) ) [2] => Array ( [OfferingPrice] => 2.34 [salesAssociate] => Array ( [badgeNumber] => 73 [Name] => Grandpa ) ) [3] => Array ( [OfferingPrice] => 44.28 [salesAssociate] => Array ( [badgeNumber] => 202 [Name] => Stewart ) ) ) ) )