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    <p>Given your input in <code>$xs</code>, the following:</p> <pre><code>$ret = array_reduce($xs, function($acc,$x) { $acc[$x['lead_id']][$x['field_number']] = $x['value']; return $acc; }, array()); </code></pre> <p>produces the output of:</p> <pre><code>array ( 2 =&gt; array ( 1 =&gt; '37', 2 =&gt; '051000549', 3 =&gt; '1050000605321', 4 =&gt; '1050000605321', 15 =&gt; '250.00', '6.3' =&gt; 'John', '6.6' =&gt; 'Doe', 7 =&gt; 'Microscope', '8.1' =&gt; '1222 McDowell Ave NE', '8.3' =&gt; 'Roanoke', '8.4' =&gt; 'Virginia', '8.5' =&gt; '24012', '8.6' =&gt; 'United States', 9 =&gt; '(540)265-3216', 10 =&gt; 'marty@microscope.com', 11 =&gt; 'John Doe', 16 =&gt; '987654321', '14.1' =&gt; 'Authorized', ), 3 =&gt; array ( 1 =&gt; '27', 2 =&gt; '987654321', 3 =&gt; '1050000123456', 4 =&gt; '1050000123456', 15 =&gt; '350.00', '6.3' =&gt; 'Jane', '6.6' =&gt; 'Doe', 7 =&gt; 'Acme Inc', '8.1' =&gt; '6724 Laban Rd', '8.3' =&gt; 'Roanoke', '8.4' =&gt; 'Virginia', '8.5' =&gt; '24019', '8.6' =&gt; 'United States', 9 =&gt; '(540)362-2773', 10 =&gt; 'm@seoserpent.com', 11 =&gt; 'Acme Inc.', 16 =&gt; '987654321', '14.1' =&gt; 'Authorized', ), ) </code></pre> <p><em>Update:</em> The input I used is:</p> <pre><code>$xs = array ( 0 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '1', 'value' =&gt; '37', ), 1 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '2', 'value' =&gt; '051000549', ), 2 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '3', 'value' =&gt; '1050000605321', ), 3 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '4', 'value' =&gt; '1050000605321', ), 4 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '15', 'value' =&gt; '250.00', ), 5 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '6.3', 'value' =&gt; 'John', ), 6 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '6.6', 'value' =&gt; 'Doe', ), 7 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '7', 'value' =&gt; 'Microscope', ), 8 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '8.1', 'value' =&gt; '1222 McDowell Ave NE', ), 9 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '8.3', 'value' =&gt; 'Roanoke', ), 10 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '8.4', 'value' =&gt; 'Virginia', ), 11 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '8.5', 'value' =&gt; '24012', ), 12 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '8.6', 'value' =&gt; 'United States', ), 13 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '9', 'value' =&gt; '(540)265-3216', ), 14 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '10', 'value' =&gt; 'marty@microscope.com', ), 15 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '11', 'value' =&gt; 'John Doe', ), 16 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '16', 'value' =&gt; '987654321', ), 17 =&gt; array ( 'lead_id' =&gt; '2', 'field_number' =&gt; '14.1', 'value' =&gt; 'Authorized', ), 18 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '1', 'value' =&gt; '27', ), 19 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '2', 'value' =&gt; '987654321', ), 20 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '3', 'value' =&gt; '1050000123456', ), 21 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '4', 'value' =&gt; '1050000123456', ), 22 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '15', 'value' =&gt; '350.00', ), 23 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '6.3', 'value' =&gt; 'Jane', ), 24 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '6.6', 'value' =&gt; 'Doe', ), 25 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '7', 'value' =&gt; 'Acme Inc', ), 26 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '8.1', 'value' =&gt; '6724 Laban Rd', ), 27 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '8.3', 'value' =&gt; 'Roanoke', ), 28 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '8.4', 'value' =&gt; 'Virginia', ), 29 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '8.5', 'value' =&gt; '24019', ), 30 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '8.6', 'value' =&gt; 'United States', ), 31 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '9', 'value' =&gt; '(540)362-2773', ), 32 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '10', 'value' =&gt; 'm@seoserpent.com', ), 33 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '11', 'value' =&gt; 'Acme Inc.', ), 34 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '16', 'value' =&gt; '987654321', ), 35 =&gt; array ( 'lead_id' =&gt; '3', 'field_number' =&gt; '14.1', 'value' =&gt; 'Authorized', ), ); </code></pre> <p>Also, you may find a <code>foreach</code> or <code>while</code> loop more readable than <code>array_reduce</code>:</p> <pre><code>$ret = array(); foreach ($xs as $x) { $ret[$x['lead_id']][$x['field_number']] = $x['value']; } </code></pre>
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    1. POmultidimensional array output. Help me extract and loop through this mess please
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    1. This table or related slice is empty.
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    1. POmultidimensional array output. Help me extract and loop through this mess please
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    1. COThis is EXACTLY what I'm trying to do. Not sure about the value of $xs though. I changed it for me to $join_query from my example but that just returns NULL on a var_dump. Can you advise?
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    2. COI've updated the answer to include the input, maybe there's some subtle difference.
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