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run code in 150+ php & hhvm versions
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<?php // Everything you enter here will be executed by our servers. Try it! $data = array( array( 'id' => 1, 'name' => 'bob', 'product_id' => 1, 'product' => 'laptop', 'price' => 999, ), array( 'id' => 1, 'name' => 'bob', 'product_id' => 2, 'product' => 'mouse', 'price' => 15, ), array( 'id' => 1, 'name' => 'bob', 'product_id' => 3, 'product' => 'keyboard', 'price' => 25, ) ); $output = array(); $userColumnIntersect = array_flip(array( 'id', 'name', )); $productColumnIntersect = array_flip(array( 'product', 'price', )); foreach($rows as $row){ $id = $row['id']; if(!isset($output[$id])){ $output[$id] = array_intersect_key($row, $internalOrderColumnIntersect); $output[$id]['products'] = array(); } $productId = $row['product_id']; if(!isset($output[$id]['products'][$productId])){ $productDataRow = array_intersect_key($row, $productColumnIntersect); $output[$id]['products'][$productId] = $productDataRow; } } echo '<pre>'; print_r($output);
Output for 5.1.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined variable: rows in /in/V2kGH on line 41 Warning: Invalid argument supplied for foreach() in /in/V2kGH on line 41 <pre>Array ( )
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: rows in /in/V2kGH on line 56 Warning: Invalid argument supplied for foreach() in /in/V2kGH on line 56 <pre>Array ( )
Output for 4.3.0 - 4.3.10, 4.4.0 - 5.0.5
Warning: Invalid argument supplied for foreach() in /in/V2kGH on line 41 <pre>Array ( )
Output for 4.3.11
<pre>Array ( )